Note: this is an archived version which has been superseded. The current SNR catalogue is at http://www.mrao.cam.ac.uk/surveys/snrs/

1st quadrant Galactic SNRs (0°<l<45°)

G0.0+0.0 Sgr A East

• Right Ascension: 17 45 44
• Declination: -29 00
• Size (/arcmin): 3.5×2.5
• Type: S
• Flux density at 1 GHz (/Jy): 100?
• Spectral Index: 0.8?

Radio: Non-thermal shell, in complex region, interacting with molecular material to the west.

References:

• Ekers et al. 1983, A&A, 122, 143. VLA at 1.4 GHz and 5 GHz (both 5"×8"), S_{1.4 GHz}=77 Jy, S_{5.0 GHz}=31 Jy. ADS
• Pedlar et al. 1989, ApJ, 342, 769. VLA at 332 MHz (12"), 1.4 GHz (1".3×2".5) and 5 GHz (1".3×2".5). ADS
• Mezger et al. 1989, A&A, 209, 337. Nearby molecular material. ADS
• Ho et al. 1991, Natur, 350, 309. VLA of NH₃ emission from surroundings. ADS
• Anantharamaiah et al. 1991, MNRAS, 249, 262. VLA at 330 MHz (17"×33"). ADS
• Serabyn et al. 1992, ApJ, 395, 166. Nearby molecular material. ADS
• Gray 1994, MNRAS, 270, 835. MOST at 843 MHz (43"×88"). ADS
• Yusef-Zadeh & Mehringer 1995, ApJ, 452, L37. VLA of nearby H₂O masers. ADS
• Yusef-Zadeh et al. 1999, ApJ, 512, 230. OH maser observations. ADS
• Coil & Ho 2000, ApJ, 533, 245. NH₃ observations of surroundings. ADS
• LaRosa et al. 2000, AJ, 119, 207. VLA at 333 MHz (43"×24"). ADS
• Fatuzzo et al. 2001, ApJ, 549, 293. Electron-positron lines from the vicinity. ADS
• Yusef-Zadeh et al. 2001, ApJ, 560, 749. Observations of nearby molecular hydrogen. ADS
• Maeda et al. 2002, ApJ, 570, 671. Chandra observations. ADS
• Sakano et al. 2003, AN, 324 (No S1), 197. XMM-Newton observations.

Last updated: 23 Jan 2004

G0.3+0.0

• Right Ascension: 17 46 15
• Declination: -28 38
• Size (/arcmin): 15×8
• Type: S
• Flux density at 1 GHz (/Jy): 22
• Spectral Index: 0.6

Notes: Has been called G0.33+0.04 and G0.4+0.1.

Radio: Bilateral shell, near Galactic Centre.

References:

• Kassim & Frail 1996, MNRAS, 283, L51. VLA at 333 MHz (23"×42"), plus review of flux densities and other observations. ADS
• LaRosa et al. 2000, AJ, 119, 207. VLA at 333 MHz (43"×24"). ADS

Last updated: 1 Aug 2000

G0.9+0.1

• Right Ascension: 17 47 21
• Declination: -28 09
• Size (/arcmin): 8
• Type: C
• Flux density at 1 GHz (/Jy): 18?
• Spectral Index: varies

Radio: Flat spectrum core within steep spectrum shell.

X-ray: Central core, with non-thermal spectrum.

References:

• Helfand & Becker 1987, ApJ, 314, 203. VLA at 1.4 and 5 GHz, and Einstein observations. ADS
• Gray 1994, MNRAS, 270, 835. MOST at 843 MHz (43"×91"). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Mereghetti et al. 1998, A&A, 331, L77. X-ray detection. ADS
• LaRosa et al. 2000, AJ, 119, 207. VLA at 333 MHz (43"×24"). ADS
• Sidoli et al. 2000, A&A, 361, 719. BeppoSAX observations. ADS
• Gaensler et al. 2001, ApJ, 556, L107. Chandra observations. ADS
• Porquet et al. 2003, A&A, 401, 197. XMM-Newton observations. ADS

Last updated: 23 Jan 2004

G1.0-0.1

• Right Ascension: 17 48 30
• Declination: -28 09
• Size (/arcmin): 8
• Type: S
• Flux density at 1 GHz (/Jy): 15
• Spectral Index: 0.6?

Notes: Has been called G1.05-0.1 and G1.05-0.15.

Radio: Incomplete shell, to the S of Sgr D.

X-ray: Possibly detected.

References:

• Downes et al. 1979, A&AS, 35, 1. Review of flux densities. ADS
• Anantharamaiah et al. 1991, MNRAS, 249, 262. VLA at 330 MHz (64"×100": S=12.3 Jy). ADS
• Liszt 1992, ApJS, 82, 495. VLA at 1.6 GHz (13"×23"). ADS
• Gray 1994, MNRAS, 270, 835. MOST at 843 MHz (43"×91"). ADS
• Mehringer et al. 1998, ApJ, 493, 274. VLA at 1.6 GHz (15"×28") and 5 GHz, including masers observations. ADS
• Yusef-Zadeh et al. 1999, ApJ, 527, 172. VLA of nearby OH masers. ADS
• LaRosa et al. 2000, AJ, 119, 207. VLA at 333 MHz (43"×24"). ADS
• Sidoli et al. 2001, A&A, 372, 651. BeppoSAX possible detection. ADS

Last updated: 17 Oct 2001

G1.4-0.1

• Right Ascension: 17 49 39
• Declination: -27 46
• Size (/arcmin): 10
• Type: S
• Flux density at 1 GHz (/Jy): 2?
• Spectral Index: ?

Radio: Shell, brightest in E.

References:

• Gray 1994, MNRAS, 270, 847. MOST at 843 MHz (43"×92": S=2 Jy). ADS
• Yusef-Zadeh et al. 1999, ApJ, 527, 172. VLA of nearby OH masers. ADS
• Bhatnagar 2002, MNRAS, 332, 1. GMRT at 327 MHz (2.7'×2.4': S=4.2±0.5). ADS

Last updated: 11 Jan 2004

G1.9+0.3

• Right Ascension: 17 48 45
• Declination: -27 10
• Size (/arcmin): 1.2
• Type: S
• Flux density at 1 GHz (/Jy): 0.6
• Spectral Index: 0.7

Radio: Shell, brighter to the N.

References:

• Green & Gull 1984, Natur, 312, 527. VLA at 5 GHz (4".4×2"). ADS
• Gray 1994, MNRAS, 270, 835. MOST at 843 MHz (43"×94"). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G3.7-0.2

• Right Ascension: 17 55 26
• Declination: -25 50
• Size (/arcmin): 14×11
• Type: S
• Flux density at 1 GHz (/Jy): 2.3
• Spectral Index: 0.65

Notes: Hase been called G003.8-00.3.

Radio: Double arc.

References:

• Gray 1994, MNRAS, 270, 847. MOST at 843 MHz (43"×99": S=2.4 Jy). ADS
• Gaensler 1998, ApJ, 493, 781. VLA at 1.4 GHz (9"×15": S=1.7±0.1 Jy). ADS

Last updated: 13 Aug 1998

G3.8+0.3

• Right Ascension: 17 52 55
• Declination: -25 28
• Size (/arcmin): 18
• Type: S?
• Flux density at 1 GHz (/Jy): 3?
• Spectral Index: 0.6

Radio: Incomplete shell.

References:

• Gray 1994, MNRAS, 270, 847. MOST at 843 MHz (43"×100": S=3.5 Jy). ADS
• Bhatnagar 2002, MNRAS, 332, 1. GMRT at 327 MHz (27"×17": S=6.0±0.4). ADS

Last updated: 11 Jan 2004

G4.2-3.5

• Right Ascension: 18 08 55
• Declination: -27 03
• Size (/arcmin): 28
• Type: S
• Flux density at 1 GHz (/Jy): 3.2?
• Spectral Index: 0.6?

Radio: Elongated shell.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS

Last updated: 19th May 1992

G4.5+6.8 Kepler, SN1604, 3C358

• Right Ascension: 17 30 42
• Declination: -21 29
• Size (/arcmin): 3
• Type: S
• Flux density at 1 GHz (/Jy): 19
• Spectral Index: 0.64

Notes: This is the remnant of Kepler's SN of AD1604.

Radio: Incomplete shell, brighter to the N.

Optical: Faint filaments.

X-ray: Shell, brighter to the N.

Distance: Optical expansion and proper motion indicates about 2.9 kpc, HI observations suggest 3.4 to 6.4 kpc.

References:

• van den Bergh & Kamper 1977, ApJ, 218, 617. Optical proper motions. ADS
• Leibowitz & Danziger 1983, MNRAS, 204, 273. Optical spectra. ADS
• White & Long 1983, ApJ, 264, 196. Einstein observations. ADS
• Matsui et al. 1984, ApJ, 287, 295. VLA at 1.4 (2".5×3".2) and 5 GHz (3".2×4".8) and Einstein image (5"). ADS
• Dickel et al. 1988, ApJ, 330, 254. VLA at 1.4 (1".2×2".3) and 5 GHz (0".6×1".0) at two epochs. ADS
• Smith et al. 1989, ApJ, 347, 925. EXOSAT observations. ADS
• Hatsukade et al. 1990, PASJ, 42, 279. X-ray spectrum. ADS
• Blair et al. 1991, ApJ, 366, 484. Optical imaging and spectroscopy. ADS
• Bandiera & van den Bergh 1991, ApJ, 374, 186. Optical changes. ADS
• van den Bergh 1991, PASP, 103, 194. Optical imaging. ADS
• Predehl & Schmitt 1995, A&A, 293, 889. ROSAT of dust scattered halo. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Hughes 1999, ApJ, 527, 298. ROSAT and Einstein image comparison for expansion studies. ADS
• Reynoso & Goss 1999, AJ, 118, 926. VLA at 1.4 GHz (23"×13") for HI studies. ADS
• Kinugasa & Tsunemi 1999, PASJ, 51, 239. ASCA observations. ADS
• Gerardy & Fesen 2001, AJ, 121, 2781. IR spectroscopy and imaging. ADS
• DeLaney et al. 2002, ApJ, 580, 914. VLA at 1.3 to 1.5 GHz and 5 GHz (7".2) for spectral index studies. ADS
• Morgan et al. 2003, ApJ, 597, L33. Sub-mm dust observations. ADS
• Sollerman et al. 2003, A&A, 407, 249. Optical spectroscopy. ADS

Last updated: 11 Jan 2004

G4.8+6.2

• Right Ascension: 17 33 25
• Declination: -21 34
• Size (/arcmin): 18
• Type: S
• Flux density at 1 GHz (/Jy): 3
• Spectral Index: 0.6

Notes: Has been called G4.5+6.2.

Radio: Faint shell.

References:

• Bhatnagar 2000, MNRAS, 317, 453. GMRT at 327 MHz (2'.2×1'.3: S=5.5±1.2 Jy), and NVSS at 1.4 GHz. ADS

Last updated: 12 Oct 2001

G5.2-2.6

• Right Ascension: 18 07 30
• Declination: -25 45
• Size (/arcmin): 18
• Type: S
• Flux density at 1 GHz (/Jy): 2.6?
• Spectral Index: 0.6?

Radio: Poorly resolved shell.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS

Last updated: 19th May 1992

G5.4-1.2 Milne 56

• Right Ascension: 18 02 10
• Declination: -24 54
• Size (/arcmin): 35
• Type: C?
• Flux density at 1 GHz (/Jy): 35?
• Spectral Index: 0.2?

Notes: Part been called G5.3-1.0. Has been suggested that this is not a SNR.

Radio: Incomplete shell, including wide `v' of emission to east with small flat-spectrum source at apex.

Optical: Detected.

X-ray: Pulsar detected, with faint extension.

Distance: HI absorption suggests >4.3 kpc.

Point sources: Pulsar associated with flat spectrum source.

References:

• Clark et al. 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=38 Jy). ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3'). ADS
• Dickel & Milne 1976, AuJPh, 29, 435. Comparison of earlier Parkes 64-m maps at 2.7 GHz (8'.4) and 5 GHz (4'.4). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=21.9±2.4 Jy). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Zealey et al. 1979, A&AS, 38, 39. Optical detection. ADS
• Becker & Helfand 1985, Natur, 313, 115. VLA at 1.4 and 5 GHz. ADS
• Helfand & Becker 1985, Natur, 313, 118. Suggesting it is not a SNR. ADS
• Manchester et al. 1985, MNRAS, 212, 975. Pulsar detection. ADS
• Caswell et al. 1987, MNRAS, 225, 329. MOST at 843 MHz (42"×110"). ADS
• Frail & Kulkarni 1991, Natur, 352, 785. Pulsar and remnant association. ADS
• Manchester et al. 1991, MNRAS, 253, 7P. Pulsar and remnant association. ADS
• Milne et al. 1992, MNRAS, 255, 707. Parkes 64-m at 4.75 (4'.5: S=30.8±2.1 Jy) and 8.4 GHz (3': S=24±3 Jy), including polarization. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.0×4'.9: S=38 Jy). ADS
• Frail et al. 1994, AJ, 107, 1120. VLA at 327 MHz (68"×73"), plus HI absorption. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Gaensler & Frail 2000, Natur, 406, 158. Pulsar observations, including proper motion. ADS
• Kaspi et al. 2001, ApJ, 562, L163. X-ray detection of pulsar, and upper limit for remnant. ADS
• Thorsett et al. 2002, ApJ, 573, L111. Proper motion study of pulsar. ADS

Last updated: 9 Dec 2001

G5.9+3.1

• Right Ascension: 17 47 20
• Declination: -22 16
• Size (/arcmin): 20
• Type: S
• Flux density at 1 GHz (/Jy): 3.3?
• Spectral Index: 0.4?

Radio: Asymmetric shell.

References:

• Reich et al. 1988, in SNRISM, p293. Effelsberg 100-m at 2.7 GHz (4'.3). ADS

Last updated: 19th May 1992

G6.1+1.2

• Right Ascension: 17 54 55
• Declination: -23 05
• Size (/arcmin): 30×26
• Type: F
• Flux density at 1 GHz (/Jy): 4.0?
• Spectral Index: 0.3?

Notes: Has been called G6.1+1.15.

Radio: Faint, diffuse emission.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS

Last updated: 28 Jun 1995

G6.4-0.1 W28

• Right Ascension: 18 00 30
• Declination: -23 26
• Size (/arcmin): 48
• Type: C
• Flux density at 1 GHz (/Jy): 310
• Spectral Index: varies

Notes: Has been called G6.6-0.2.

Radio: Several non-thermal sources in a ring, with flat spectrum core.

Optical: Filaments.

X-ray: Diffuse emission from most of the remnant.

Point sources: Young pulsar near edge of remnant, but not thought to be related.

Distance: HI observations suggest 1.9 kpc.

References:

• Kundu & Velusamy 1972, A&A, 20, 237. NRAO 140-ft at 10 GHz (3'). ADS
• van den Bergh et al. 1973, ApJS, 26, 19. Optical. ADS
• Dickel & Milne 1976, AuJPh, 29, 435. Comparison of earlier Parkes 64-m maps at 2.7 GHz (8'.4) and 5 GHz (4'.4). ADS
• Dopita et al. 1977, ApJ, 214, 179. Some optical line ratios. ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Lozinskaya 1981, SvAL, 7, 17. Mean optical velocity. ADS
• Andrews et al. 1983, ApJ, 266, 684. VLA at 1.4 GHz (8") 4.9 GHz (3") and 15 GHz (1") of central region only, plus Einstein image of central region. ADS
• Bohigas et al. 1983, RMxAA, 8, 155. Optical spectra. ADS
• Odenwald et al. 1984, ApJ, 279, 162. Nearby IR source. ADS
• Andrews et al. 1985, AJ, 90, 310. VLA of central component. ADS
• Long et al. 1991, ApJ, 373, 567. Einstein and optical observations. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.1×4'.4: S=660 Jy). ADS
• Kaspi et al. 1993, ApJ, 409, L57. Pulsar association. ADS
• Frail et al. 1993, Natur, 365, 136. VLA at 327 MHz (smoothed to 65"), plus pulsar association. ADS
• Frail et al. 1994, ApJ, 424, L111. VLA of associated OH masers. ADS
• Esposito et al. 1996, ApJ, 461, 820. Possible associated gamma-ray emission. ADS
• Frail et al. 1996, AJ, 111, 1651. OH maser emission. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Claussen et al. 1997, ApJ, 489, 143. VLA of OH masers. ADS
• Claussen et al. 1999, ApJ, 522, 349. High resolution observations of OH masers. ADS
• Arikawa et al. 1999, PASJ, 51, L7. Observations of shocked CO. ADS
• Yusef-Zadeh et al. 2000, ApJ, 540, 842. VLA at 327 MHz (2'.6×5'.5) and 1.48 GHz (40"×65"). ADS
• Dubner et al. 2000, AJ, 120, 1933. VLA at 328 MHz (97"×52": S=425±40 Jy) and 1415 MHz (88"×48": S=246±20 Jy), and comparison with other observations. ADS
• Reach & Rho 2000, ApJ, 544, 843. ISO observations on interactions with surroundings. ADS
• Rowell et al. 2000, A&A, 359, 337. Upper limit on high energy gamma-rays. ADS
• Douvion et al. 2001, A&A, 373, 281. ISO observations. ADS
• Roberts et al. 2001, ApJS, 133, 451. ASCA observations. ADS
• Velázquez et al. 2002, AJ, 124, 2145. Parkes 64-m at 1.4 GHz (15') for HI. ADS
• Rho & Borkowski 2002, ApJ, 575, 201. ROSAT and ASCA observations. ADS
• Claussen et al. 2002, ApJ, 580, 909. Observations of nearby source. ADS
• Yusef-Zadeh et al. 2003, ApJ, 583, 267. OH observations. ADS

Last updated: 11 Jan 2004

G6.4+4.0

• Right Ascension: 17 45 10
• Declination: -21 22
• Size (/arcmin): 31
• Type: S
• Flux density at 1 GHz (/Jy): 1.3?
• Spectral Index: 0.4?

Radio: Faint asymmetric shell.

References:

• Reich et al. 1988, in SNRISM, p293. Effelsberg 100-m at 2.7 GHz (4'.3). ADS

Last updated: 19th May 1992

G7.0-0.1

• Right Ascension: 18 01 50
• Declination: -22 54
• Size (/arcmin): 15
• Type: S
• Flux density at 1 GHz (/Jy): 2.5?
• Spectral Index: 0.5?

Notes: Has been called G7.06-0.12.

Radio: Double rim, brightest in W, confused by bright HII region M20 in SE.

References:

• Yusef-Zadeh et al. 2000, ApJ, 540, 842. VLA at 327 MHz (2'.6×5'.5) and 1.48 GHz (40"×65"). ADS
• Dubner et al. 2000, AJ, 120, 1933. VLA at 328 MHz (97"×52") and 1415 MHz (88"×48"). ADS

Last updated: 10th October 2001

G7.7-3.7 1814-24

• Right Ascension: 18 17 25
• Declination: -24 04
• Size (/arcmin): 22
• Type: S
• Flux density at 1 GHz (/Jy): 11
• Spectral Index: 0.32

Radio: Shell, with high polarization.

References:

• Dickel & Milne 1976, AuJPh, 29, 435. Comparison of earlier Parkes 64-m maps at 2.7 GHz (8'.4) and 5 GHz (4'.4). ADS
• Milne et al. 1986, MNRAS, 223, 487. MOST at 843 MHz (44"×108") and Parkes 64-m at 8.4 GHz (3': S=4.6±0.5 Jy), with polarization, plus review of flux densities. ADS
• Dubner et al. 1996, AJ, 111, 1304. VLA at 1.4 GHz (70"×35": S=9.9±0.1 Jy), including polarization. ADS

Last updated: 20 Aug 1996

G8.7-5.0

• Right Ascension: 18 24 10
• Declination: -23 48
• Size (/arcmin): 26
• Type: S
• Flux density at 1 GHz (/Jy): 4.4
• Spectral Index: 0.3

Radio: Asymmetric shell.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS

Last updated: 19th May 1992

G8.7-0.1 (W30)

• Right Ascension: 18 05 30
• Declination: -21 26
• Size (/arcmin): 45
• Type: S?
• Flux density at 1 GHz (/Jy): 80
• Spectral Index: 0.5

Radio: Clumpy non-thermal shell, with low-frequency turnover.

X-ray: Northern edge detected.

Point sources: Pulsar inside western edge.

References:

• Odegard 1986, AJ, 92, 1372. TPT at 57.5 MHz (7'.2×9'.7: S=190±50 Jy). ADS
• Kassim & Weiler 1990, Natur, 343, 146. VLA at 327 MHz (3'.0×3'.7). ADS
• Kassim & Weiler 1990, ApJ, 360, 184. VLA at 327 MHz (2'.8×4'.1: S=129±11 Jy), and part at 1.4 GHz (0'.9×1'.8), plus review of flux densities. ADS
• Frail et al. 1994, AJ, 107, 1120. VLA at 327 MHz (37"×55"). ADS
• Finley & Ögelman 1994, ApJ, 434, L25. ROSAT observations, including pulsar. ADS

Last updated: 27 Jun 1995

G9.8+0.6

• Right Ascension: 18 05 08
• Declination: -20 14
• Size (/arcmin): 12
• Type: S
• Flux density at 1 GHz (/Jy): 3.9
• Spectral Index: 0.5

Radio: Asymmetric shell.

References:

• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Caswell 1983, MNRAS, 204, 833. Molonglo at 408 MHz (3': S=5.8±0.6 Jy). ADS
• Dubner et al. 1993, AJ, 105, 2251. VLA at 1.47 GHz (41"×63": S=3.5±0.4 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G11.2-0.3

• Right Ascension: 18 11 27
• Declination: -19 25
• Size (/arcmin): 4
• Type: C
• Flux density at 1 GHz (/Jy): 22
• Spectral Index: 0.6

Notes: Probably associated with the SN of AD386.

Radio: Symmetrical clumpy shell, with flatter spectrum core.

X-ray: Shell, with hard spectrum centrally brightened region around pulsar.

Point sources: Central pulsar.

Distance: HI absorption indicates 5 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS
• Radhakrishnan et al. 1972, ApJS, 24, 49. HI absorption. ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3'). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Downes 1984, MNRAS, 210, 845. VLA at 1465 MHz (20"×25") and Einstein observations, with review of flux densities. ADS
• Becker et al. 1985, ApJ, 296, 461. VLA at 1.4 and 5 GHz, plus HI absorption, Einstein observations. ADS
• Morsi & Reich 1987, A&AS, 71, 189. Effelsberg 100-m at 32 GHz (26".5: S=4.04±0.24 Jy). ADS
• Green et al. 1988, MNRAS, 231, 735. VLA at 1.4 and 5 GHz. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.2×4'.1: S=39 Jy). ADS
• Reynolds et al. 1994, MNRAS, 271, L1. ROSAT image and spectra. ADS
• Vasisht et al. 1996, ApJ, 456, L59. ASCA observations. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Torii et al. 1997, ApJ, 489, L145. ASCA detection of pulsar. ADS
• Torii et al. 1999, ApJ, 523, L69. X-ray timing observations of pulsar. ADS
• Kothes & Reich 2001, A&A, 372, 627. Effelsberg 100-m at 4.25, 10.45, 14.9 and 32 GHz (2'.5, 1'.1, 0'.86, 0'.45: S=9.6±0.5, 6.3±0.4, 5.7±0.4, 3.8±0.4). ADS
• Kaspi et al. 2001, ApJ, 560, 371. Chandra observations. ADS
• Tam et al. 2002, ApJ, 572, 202. VLA at 1.4/1.5 GHz (2".6×1".8: S=16.6±0.9 Jy) and 5 GHz (2".1×1".5: S=8.4±0.9 Jy) for spectral studies. ADS
• Tam & Roberts 2003, ApJ, 598, L27. Multi-epoch VLA observations at 1.4/1.5 GHz and 5 GHz, for expansion studies. ADS
• Roberts et al. 2003, ApJ, 588, 992. Chandra observations. ADS

Last updated: 11 Jan 2004

G11.4-0.1

• Right Ascension: 18 10 47
• Declination: -19 05
• Size (/arcmin): 8
• Type: S?
• Flux density at 1 GHz (/Jy): 6
• Spectral Index: 0.5

Radio: Incomplete shell, possibly with central core.

References:

• Clark et al. 1975, AuJPA, 37, 1. Molonglo at 408 MHz (3': S=9.4 Jy) contaminated by sidelobes of a nearby source, and Parkes 64-m at 5 GHz (4': S=2.8 Jy). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=2.0±0.4 Jy). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.2×4'.1: S=18 Jy). ADS
• Dubner et al. 1993, AJ, 105, 2251. VLA at 1.47 GHz (44"×63": S=5.1±0.6 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G12.0-0.1

• Right Ascension: 18 12 11
• Declination: -18 37
• Size (/arcmin): 7?
• Type: ?
• Flux density at 1 GHz (/Jy): 3.5
• Spectral Index: 0.7

Radio: Incomplete shell, defined in E only.

X-ray: Detected.

References:

• Clark et al. 1975, AuJPA, 37, 1. Molonglo at 408 MHz (3': S=6.6 Jy) and Parkes 64-m at 5 GHz (4': S=1.1 Jy). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.2×4'.1). ADS
• Dubner et al. 1993, AJ, 105, 2251. VLA at 1.47 GHz (41"×61": S=0.7 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS

Last updated: 10 Oct 2001

G13.3-1.3

• Right Ascension: 18 19 20
• Declination: -18 00
• Size (/arcmin): 70×40
• Type: S?
• Flux density at 1 GHz (/Jy): ?
• Spectral Index: ?

Radio: Amorphous emission.

X-ray: Elongated emission.

Optical: Filaments in S.

Distance: Absorption indicates 2-4 kpc.

References:

• Seward et al. 1995, ApJ, 449, 681. ROSAT detection, optical studies and observations of CO. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Koralesky et al. 1998, AJ, 116, 1323. VLA search for OH emission. ADS

Last updated: 1 Aug 2000

G13.5+0.2

• Right Ascension: 18 14 14
• Declination: -17 12
• Size (/arcmin): 5×4
• Type: S
• Flux density at 1 GHz (/Jy): 3.5?
• Spectral Index: 1.0?

Notes: Has been called G13.46+0.16.

Radio: Elongated, incomplete shell.

References:

• Helfand et al. 1989, ApJ, 341, 151. VLA at 5 GHz (S=0.65±0.05 Jy) and 1.4 GHz (15": S=2.67±0.5 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G15.1-1.6

• Right Ascension: 18 24 00
• Declination: -16 34
• Size (/arcmin): 30×24
• Type: S
• Flux density at 1 GHz (/Jy): 5.5?
• Spectral Index: 0.8?

Radio: Elongated, incomplete shell.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS

Last updated: 19th May 1992

G15.9+0.2

• Right Ascension: 18 18 52
• Declination: -15 02
• Size (/arcmin): 7×5
• Type: S?
• Flux density at 1 GHz (/Jy): 5
• Spectral Index: 0.6?

Radio: Incomplete shell, with bright concentration to the E.

References:

• Clark et al. 1975, AuJPA, 37, 1. Molonglo at 408 MHz (3': S=7.7 Jy) and Parkes 64-m at 5 GHz (4': S=1.9 Jy). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=1.1±0.2 Jy). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Caswell et al. 1982, MNRAS, 200, 1143. FIRST at 1415 MHz (58"×44"). ADS
• Dubner et al. 1996, AJ, 111, 1304. VLA at 330 MHz (77"×61": S=11.2±1.0 Jy), 1.4 GHz (23"×14": S=3.9±0.1 Jy) and 4.9 GHz (13"×16"). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G16.2-2.7

• Right Ascension: 18 28 50
• Declination: -16 11
• Size (/arcmin): 17
• Type: S
• Flux density at 1 GHz (/Jy): 2
• Spectral Index: 0.5

Radio: Double rim.

References:

• Trushkin 1999, A&A, 352, L103. Review of radio observations. ADS

Last updated: 26 Jul 2000

G16.7+0.1

• Right Ascension: 18 20 56
• Declination: -14 20
• Size (/arcmin): 4
• Type: C
• Flux density at 1 GHz (/Jy): 3.0
• Spectral Index: 0.6

Notes: Has been called G16.73+0.08.

Radio: Asymmetric shell with flat-spectrum core.

X-ray: Non-thermal core.

References:

• Helfand et al. 1989, ApJ, 341, 151. VLA at 5 GHz (5: S=0.95 Jy) and 1.4 GHz (15": S=2.43 Jy) and Ooty at 327 MHz (S=5.13 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations, including masers. ADS
• Reynoso & Mangum 2000, ApJ, 545, 874. CO observations of surroundings. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS
• Helfand et al. 2003, ApJ, 592, 941. XMM-Newton observations. ADS

Last updated: 11 Jan 2004

G16.8-1.1

• Right Ascension: 18 25 20
• Declination: -14 46
• Size (/arcmin): 30×24?
• Type: ?
• Flux density at 1 GHz (/Jy): 2?
• Spectral Index: ?

Notes: Has been called G16.85-1.05.

Radio: Overlapping thermal and non-thermal emission, parameters uncertain.

Point sources: Pulsar within boundary of non-thermal emission.

References:

• Reich et al. 1986, A&A, 155, 185. Effelsberg 100-m at 4.75 GHz (2'.4), plus other observations. ADS

Last updated: 13 Aug 1998

G17.4-2.3

• Right Ascension: 18 30 55
• Declination: -14 52
• Size (/arcmin): 24?
• Type: S
• Flux density at 1 GHz (/Jy): 4.8?
• Spectral Index: 0.8?

Radio: Incomplete, poorly defined shell.

Optical: Filaments to SE, and diffuse emission.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Boumis et al. 2002, A&A, 385, 1042. Optical observations. ADS

Last updated: 7 Jan 2004

G17.8-2.6

• Right Ascension: 18 32 50
• Declination: -14 39
• Size (/arcmin): 24
• Type: S
• Flux density at 1 GHz (/Jy): 4.0?
• Spectral Index: 0.3?

Radio: Well defined shell.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G18.8+0.3 Kes 67

• Right Ascension: 18 23 58
• Declination: -12 23
• Size (/arcmin): 17×11
• Type: S
• Flux density at 1 GHz (/Jy): 33
• Spectral Index: 0.4

Notes: Has been called G18.9+0.3.

Radio: Incomplete shell, in complex region near the HII region W39.

Distance: HI absorption indicates >9.5 kpc, and possibly <19 kpc.

References:

• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=17±7 Jy). ADS
• Clark et al. 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=38 Jy). ADS
• Caswell et al. 1975, A&A, 45, 239. Parkes HI absorption. ADS
• Dickel & Milne 1976, AuJPh, 29, 435. Comparison of earlier Parkes 64-m maps at 2.7 GHz (8'.4) and 5 GHz (4'.4). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Milne et al. 1989, PASAu, 8, 187. Parkes 64-m at 8.4 GHz (3'.0: S=12.9±1.0 Jy), including polarization. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (2'.9×3'.5: S=55 Jy). ADS
• Dubner et al. 1996, AJ, 111, 1304. VLA at 1.4 GHz (75"×55": S=29.9±0.3 Jy). ADS
• Dubner et al. 1999, AJ, 118, 930. Parkes 64-m at 1.6 GHz (15") for HI, VLA at 1.6 GHz (17"×12") for OH, plus CO observations. ADS

Last updated: 1 Aug 2000

G18.9-1.1

• Right Ascension: 18 29 50
• Declination: -12 58
• Size (/arcmin): 33
• Type: C?
• Flux density at 1 GHz (/Jy): 37
• Spectral Index: varies

Notes: Has been called G18.95-1.1 and G18.94-1.04.

Radio: Non-thermal, diffuse partially limb-brightened, with central ridge.

X-ray: Partial shell.

References:

• Fürst et al. 1985, Natur, 314, 720. Effelsberg 100-m at 4.75 GHz (2'.4: S=23.8 Jy), plus other flux densities. ADS
• Odegard 1986, AJ, 92, 1372. TPT at 57.5 MHz (7'.2×8': S=82±15 Jy), plus review of flux densities. ADS
• Barnes & Turtle 1988, in SNRISM, p347. Molonglo at 408 MHz (2'.9×3'.1: S=58±9 Jy) and Parkes 64-m at 5 GHz (4'.4×4'.1: S=23±6 Jy). ADS
• Patnaik et al. 1988, Natur, 332, 136. Ooty at 327 MHz (0'.6×1'.6). ADS
• Fürst et al. 1989, A&A, 209, 361. Effelsberg 100-m at 4.75 GHz (2'.45: S=23.8 Jy) and VLA at 1.5 and 4.9 GHz (19"×14"), and Effelsberg 100-m at 1.4 GHz (9') for HI. ADS
• Aschenbach et al. 1991, A&A, 246, L32. ROSAT observations. ADS
• Fürst et al. 1997, A&A, 319, 655. ROSAT observations, and Effelsberg 100-m at 10.6 GHz (1'.1). ADS

Last updated: 12 Oct 2001

G20.0-0.2

• Right Ascension: 18 28 07
• Declination: -11 35
• Size (/arcmin): 10
• Type: F
• Flux density at 1 GHz (/Jy): 10
• Spectral Index: 0.0

Radio: Faint, filled-centre, polarized.

Point sources: OH source 20.1-0.1 is nearby.

References:

• Becker & Helfand 1985, ApJ, 297, L25. VLA at 1.4 and 5 GHz (12"). ADS
• Odegard 1986, AJ, 92, 1372. TPT at 57.5 MHz (7'.2×8': S=8.5±2 Jy), plus review of flux densities. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS

Last updated: 13 Aug 1998

G21.5-0.9

• Right Ascension: 18 33 33
• Declination: -10 35
• Size (/arcmin): 4
• Type: C
• Flux density at 1 GHz (/Jy): 6?
• Spectral Index: 0.0

Notes: Early observations relate to the central core only.

Radio: Filled-centre, with high frequency turnover.

X-ray: Central core, with extended, faint halo.

Distance: HI absorption indicates 5.5 kpc or more.

References:

• Wilson & Weiler 1976, A&A, 53, 89. WSRT at 5 GHz (6"×35"). ADS
• Becker & Kundu 1976, ApJ, 204, 427. NRAO interferometer at 2.7 GHz (20"×5") and 8 GHz (7"×2"), plus review of flux densities. ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Becker & Szymkowiak 1981, ApJ, 248, L23. VLA at 5 GHz (8"), and Einstein observations. ADS
• Davelaar et al. 1986, ApJ, 300, L59. EXOSAT X-ray spectrum, and VLA HI observations. ADS
• Morsi & Reich 1987, A&AS, 69, 533. Effelsberg 100-m at 32 GHz (26".5: S=5.64±0.29 Jy). ADS
• Fürst et al. 1988, PASJ, 40, 347. NRO array at 22.3 GHz (4".4×7".3). ADS
• Salter et al. 1989, A&A, 225, 167. Observations at 90.7 (29".5: S=3.8±0.4 Jy) and 141.9 GHz (S=2.5±1.2 Jy). ADS
• Salter et al. 1989, ApJ, 338, 171. NRAO 12-m at 84.2 GHz (S=3.94±0.70 Jy), plus review of flux densities. ADS
• Asaoka & Koyama 1990, PASJ, 42, 625. Ginga X-ray spectrum. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.3×3'.4: S=9 Jy). ADS
• Wallace et al. 1994, A&A, 286, 565. HI of surroundings. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Slane et al. 2000, ApJ, 533, L29. Chandra observations identifying X-ray halo. ADS
• Warwick et al. 2001, A&A, 365, L248. XMM-Newton observations of X-ray halo. ADS
• Bock et al. 2001, ApJ, 561, L203. BIMA at 94 GHz (8".6×4".6). ADS
• Safi-Harb et al. 2001, ApJ, 561, 308. Chandra and other X-ray observations. ADS
• La Palombara & Mereghetti 2002, A&A, 383, 916. XMM-Newton upper limit on pulsations. ADS

Last updated: 7 Jan 2004

G21.8-0.6 Kes 69

• Right Ascension: 18 32 45
• Declination: -10 08
• Size (/arcmin): 20
• Type: S
• Flux density at 1 GHz (/Jy): 69
• Spectral Index: 0.5

Radio: Incomplete shell.

X-ray: Detected.

Distance: H₂CO absorption indicates >6.3 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS
• Wilson 1972, A&A, 19, 354. H₂CO absorption. ADS
• Kundu et al. 1974, AJ, 79, 132. NRAO 140-ft at 5 GHz (6') and 10 GHz (3'). ADS
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft et 2.7 GHz (5': S=42.3±4.6 Jy). ADS
• Dickel & Milne 1976, AuJPh, 29, 435. Comparison of earlier Parkes 64-m maps at 2.7 GHz (8'.4) and 5 GHz (4'.4). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Seward 1990, ApJS, 73, 781. Einstein observations. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.3×3'.5: S=132 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations, including masers. ADS

Last updated: 27 Jan 2004

G22.7-0.2

• Right Ascension: 18 33 15
• Declination: -09 13
• Size (/arcmin): 26
• Type: S?
• Flux density at 1 GHz (/Jy): 33
• Spectral Index: 0.6

Radio: Non-thermal ring in complex region, overlapping G23.3-0.3.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.3×3'.4: S=82 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G23.3-0.3 W41

• Right Ascension: 18 34 45
• Declination: -08 48
• Size (/arcmin): 27
• Type: S
• Flux density at 1 GHz (/Jy): 70
• Spectral Index: 0.5

Radio: Incomplete ring, in complex region, overlapping G22.7-0.2.

Point sources: Pulsar association suggested.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.3×3'.4: S=138 Jy). ADS
• Gaensler & Johnston 1995, MNRAS, 275, L73. Possible pulsar association. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G23.6+0.3

• Right Ascension: 18 33 03
• Declination: -08 13
• Size (/arcmin): 10?
• Type: ?
• Flux density at 1 GHz (/Jy): 8?
• Spectral Index: 0.3

Radio: Not well resolved, in complex region.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G24.7-0.6

• Right Ascension: 18 38 43
• Declination: -07 32
• Size (/arcmin): 15?
• Type: S?
• Flux density at 1 GHz (/Jy): 8
• Spectral Index: 0.5

Radio: Incomplete shell, defined in SW.

References:

• Clark et al. 1975, AuJPA, 37, 1. Molonglo at 408 MHz (3': S=12.3 Jy) and Parkes 64-m at 5 GHz (4': S=3.6 Jy). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=2.2±0.5 Jy). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Dubner et al. 1993, AJ, 105, 2251. VLA at 1.47 GHz (44"×56": S=1.9 Jy). ADS
• Frail et al. 1996, AJ, 111, 1651. OH emission near remnant. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS

Last updated: 13 Aug 1998

G24.7+0.6

• Right Ascension: 18 34 10
• Declination: -07 05
• Size (/arcmin): 30×15
• Type: C?
• Flux density at 1 GHz (/Jy): 20?
• Spectral Index: 0.2?

Radio: Filled-centre, with faint shell, and a compact HII region to the S.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Reich et al. 1984, A&A, 133, L4. Effelsberg 100-m at 2.7 GHz (4.3: S=19±3 Jy) and 4.75 GHz (2'.4: S=17±4 Jy) and NRO 45-m at 10.2 GHz (2'.7: S=15±3 Jy). ADS
• Becker & Helfand 1987, ApJ, 316, 660. VLA at 1.4 GHz (12"), and X-ray upper limit. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS

Last updated: 13 Aug 1998

G27.4+0.0 4C-04.71

• Right Ascension: 18 41 19
• Declination: -04 56
• Size (/arcmin): 4
• Type: S
• Flux density at 1 GHz (/Jy): 6
• Spectral Index: 0.68

Notes: Early references refer to G27.3-0.1 (Kes 73), a supposed larger remnant.

Radio: Incomplete shell.

X-ray: Diffuse emission, with central low period pulsar.

Point sources: Central AXP.

Distance: HI absorption indicates 6 to 7.5 kpc.

References:

• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5'). ADS
• Dickel & Milne 1976, AuJPh, 29, 435. Comparison of earlier Parkes 64-m maps at 2.7 GHz (8'.4) and 5 GHz (4'.4). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=2.0±0.5 Jy). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Clark et al. 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=4.4 Jy). ADS
• Caswell et al. 1982, MNRAS, 200, 1143. FIRST at 1415 MHz (60"×45": S=3.5 Jy). Revise S_{408 MHz}=10.4 Jy, and S_{5 GHz}=1.9±0.2 Jy. ADS
• Kriss et al. 1985, ApJ, 288, 703. Einstein observations, plus VLA at 1.4 and 5 GHz (12"). ADS
• Sanbonmatsu & Helfand 1992, AJ, 104, 2189. VLA at 1.4 GHz for HI absorption. ADS
• Helfand et al. 1994, ApJ, 434, 627. ROSAT observations, particularly of central source. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations, including nearby masers. ADS
• Vasisht & Gotthelf 1997, ApJ, 486, L129. ASCA detection of pulsar. ADS
• Gotthelf & Vasisht 1997, ApJ, 486, L133. ASCA observations. ADS
• Gotthelf et al. 1999, ApJ, 522, L49. X-ray timing observations of pulsar. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS
• Mereghetti et al. 2001, MNRAS, 321, 143. Search for optical/IR counterpart to pulsar. ADS

Last updated: 17 Oct 2001

G27.8+0.6

• Right Ascension: 18 39 50
• Declination: -04 24
• Size (/arcmin): 50×30
• Type: F
• Flux density at 1 GHz (/Jy): 30
• Spectral Index: varies

Radio: Filled-centre, with spectral turnover.

References:

• Reich et al. 1984, A&A, 133, L4. Effelsberg 100-m at 2.7 GHz (4'.3: S=23±2 Jy), and 4.75 GHz (2'.4: S=18±2 Jy) and NRO 45-m at 10.2 GHz (smoothed to 4'.3: S=8.5±2 Jy). ADS
• Frail et al. 1996, AJ, 111, 1651. OH emission near remnant. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS

Last updated: 13 Aug 1998

G28.6-0.1

• Right Ascension: 18 43 55
• Declination: -03 53
• Size (/arcmin): 13×9
• Type: S
• Flux density at 1 GHz (/Jy): 3?
• Spectral Index: ?

Radio: Poorly defined regions of non-thermal emission.

X-ray: Diffuse shell, with thermal and non-thermal emission.

References:

• Helfand et al. 1989, ApJ, 341, 151. VLA at 1.4 GHz (15") and 5 GHz (15"). ADS
• Bamba et al. 2001, PASJ, 53, L21. ASCA observations. ADS
• Ueno et al. 2003, ApJ, 588, 338. Chandra observations. ADS

Last updated: 11 Jan 2004

G28.8+1.5

• Right Ascension: 18 39 00
• Declination: -02 55
• Size (/arcmin): 100?
• Type: S?
• Flux density at 1 GHz (/Jy): ?
• Spectral Index: 0.4?

Radio: Part of rim detected.

X-ray: Diffuse, Centrally brightened.

References:

• Schwentker 1994, A&A, 286, L47. ROSAT observations. ADS
• Song et al. 2000, PASJ, 52, 181. ASCA observations. ADS

Last updated: 17 Oct 2001

G29.6+0.1

• Right Ascension: 18 44 52
• Declination: -02 57
• Size (/arcmin): 5
• Type: S
• Flux density at 1 GHz (/Jy): 1.5?
• Spectral Index: 0.5?

Radio: Diffuse shell.

Point sources: AXP associated.

References:

• Gaensler et al. 1999, ApJ, 526, L37. VLA at 5 GHz (13") and 8 GHz (8") ADS
• Vasisht et al. 2000, ApJ, 542, L49. X-ray observations of AXP. ADS

Last updated: 10 Oct 2001

G29.7-0.3 Kes 75

• Right Ascension: 18 46 25
• Declination: -02 59
• Size (/arcmin): 3
• Type: C
• Flux density at 1 GHz (/Jy): 10
• Spectral Index: 0.7

Radio: Shell with flatter spectrum emission from centre.

X-ray: Thermal shell and non-thermal core, and central pulsar.

Point sources: X-ray pulsar.

Distance: HI absorption indicates >9 kpc and possibly at 21 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS
• Milne & Dickel 1974, AuJPh, 27, 549. Parkes 64-m at 2.7 GHz (8'.4: S=5±20% Jy). ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3'). ADS
• Becker & Kundu 1976, ApJ, 204, 427. NRAO interferometer at 2.7 GHz (20"×7") and 8 GHz (25"×8"), plus review of flux densities. ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Becker et al. 1983, ApJ, 268, L93. VLA at 1.4 GHz (3"), plus Einstein observations. ADS
• Becker & Helfand 1984, ApJ, 283, 154. VLA at 5 GHz (2".6), plus HI. ADS
• Morsi & Reich 1987, A&AS, 71, 189. Effelsberg 100-m at 32 GHz (26".5: S=1.02±0.07 Jy). ADS
• Salter et al. 1989, ApJ, 338, 171. NRAO 12-m at 84.2 GHz of core, plus review of flux densities. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.4×3'.7: S=27.4 Jy). ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Blanton & Helfand 1996, ApJ, 470, 961. ASCA observations. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Gotthelf et al. 2000, ApJ, 542, L37. X-ray pulsar detection. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS
• Mereghetti et al. 2002, ApJ, 574, 873. BeppoSAX observations of pulsar. ADS
• Helfand et al. 2003, ApJ, 582, 783. Chandra observations. ADS

Last updated: 11 Jan 2004

G30.7-2.0

• Right Ascension: 18 54 25
• Declination: -02 54
• Size (/arcmin): 16
• Type: ?
• Flux density at 1 GHz (/Jy): 0.5?
• Spectral Index: 0.7?

Radio: Poorly defined.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G30.7+1.0

• Right Ascension: 18 44 00
• Declination: -01 32
• Size (/arcmin): 24×18
• Type: S?
• Flux density at 1 GHz (/Jy): 6
• Spectral Index: 0.4

Radio: Non-thermal, highly polarized part shell?

Point sources: Compact source near centre.

References:

• Reich et al. 1986, A&A, 155, 185. Effelsberg 100-m at 4.75 GHz (2'.4: S=3.4±0.4 Jy), plus other flux densities. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.6×3'.9: S=8.6 Jy). ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS

Last updated: 13 Aug 1998

G31.5-0.6

• Right Ascension: 18 51 10
• Declination: -01 31
• Size (/arcmin): 18?
• Type: S?
• Flux density at 1 GHz (/Jy): 2?
• Spectral Index: ?

Notes: Has been called G31.55-0.65.

Radio: Distorted shell? near HII region.

Optical: Diffuse, incomplete shell.

References:

• Fürst et al. 1987, A&AS, 69, 403. Effelsberg 100-m at 4.75 GHz (2'.4), plus other flux densities. ADS
• Mavromatakis et al. 2001, A&A, 370, 265. Optical observations. ADS

Last updated: 17 Oct 2001

G31.9+0.0 3C391

• Right Ascension: 18 49 25
• Declination: -00 55
• Size (/arcmin): 7×5
• Type: S
• Flux density at 1 GHz (/Jy): 24
• Spectral Index: 0.55

Radio: Shell, brightest in NW.

X-ray: Diffuse with central core.

Distance: HI absorption is seen to the tangent point (8.5 kpc).

References:

• Radhakrishnan et al. 1972, ApJS, 24, 49. HI absorption. ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3'). ADS
• Green et al. 1975, A&A, 44, 187. Effelsberg 100-m at 15 GHz (58": S>1.6). ADS
• Becker & Kundu 1976, ApJ, 204, 427. NRAO interferometer at 2.7 GHz (20"×23") and 8 GHz (24"×9"), plus review of flux densities. ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Goss et al. 1979, A&A, 78, 75. FIRST at 1.4 GHz (54"×66": S=20±2 Jy) and Effelsberg 100-m at 10.7 GHz (77": S=7.5±0.8 Jy). ADS
• Wang & Seward 1984, ApJ, 279, 705. Einstein observations. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.4×3'.7: S=44.8 Jy). ADS
• Reynolds & Moffett 1993, AJ, 105, 2226. VLA at 1.4 GHz (6"), including possible associated CO. ADS
• Moffett & Reynolds 1994, ApJ, 425, 668. VLA at 330 MHz (smoothed to 30": S=38.5±0.5 Jy) 1.46 GHz (6".7) and 4.85 GHz (6".2×6".4), including spectral index and polarization studies. ADS
• Frail et al. 1996, AJ, 111, 1651. OH emission near remnant, including masers. ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
• Reach & Rho 1996, A&A, 315, L277. ISO spectroscopy. ADS
• Rho & Petre 1996, ApJ, 467, 698. ROSAT observations. ADS
• Wilner et al. 1998, AJ, 115, 247. CO observations of surroundings. ADS
• Reach & Rho 1998, ApJ, 507, L93. ISO observations. ADS
• Reach & Rho 1999, ApJ, 511, 836. CO, HCO⁺ and CS observations of surroundings. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS
• Chen & Slane 2001, ApJ, 563, 202. ASCA observations. ADS
• Reach et al. 2002, ApJ, 564, 302. Observations of shocked molecular species. ADS

Last updated: 23 Jan 2004

G32.0-4.9 3C396.1

• Right Ascension: 19 06 00
• Declination: -03 00
• Size (/arcmin): 60?
• Type: S?
• Flux density at 1 GHz (/Jy): 22?
• Spectral Index: 0.5?

Radio: Possible large shell?

References:

• Milne & Hill 1969, AuJPh, 22, 211. Parkes 64-m at 635 MHz (31': S=25±30% Jy), 1410 MHz (15': S=19±15% Jy) and 2650 MHz (8'.4: S=8.6±30% Jy). Fluxes if size is 60', plus review of flux densities. ADS
• Caswell 1970, AuJPh, 23, 105. Revision of low frequency flux densities. ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo at 111 MHz (S=105±30 Jy). ADS

Last updated: 25th February 1988

G32.1-0.9

• Right Ascension: 18 53 10
• Declination: -01 08
• Size (/arcmin): 40?
• Type: C?
• Flux density at 1 GHz (/Jy): ?
• Spectral Index: ?

Radio: Possible faint shell, not well defined.

X-ray: Diffuse, with clumps.

References:

• Folgheraiter et al. 1997, MNRAS, 292, 365. ROSAT and ASCA observations. ADS

Last updated: 17 Aug 1998

G32.8-0.1 Kes 78

• Right Ascension: 18 51 25
• Declination: -00 08
• Size (/arcmin): 17
• Type: S?
• Flux density at 1 GHz (/Jy): 11?
• Spectral Index: 0.2?

Notes: Part has been called G33.1-0.1.

Radio: Elongated shell?

References:

• Velusamy & Kundu 1974, A&A, 32, 375.NRAO 300-ft et 2.7 GHz (5': S=7.2±0.5 Jy). ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo at 430 MHz (S=19.0±15.5 Jy). ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3'). ADS
• Caswell et al. 1975, AuJPA, 37, 39. Molonglo at 408 MHz (3': S=12.8 Jy) and Parkes 64-m at 5 GHz (4': S=7.7 Jy). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.6×3'.8: S=31.3 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Koralesky et al. 1998, AJ, 116, 1323. VLA detection of compact OH emission. ADS

Last updated: 1 Aug 2000

G33.2-0.6

• Right Ascension: 18 53 50
• Declination: -00 02
• Size (/arcmin): 18
• Type: S
• Flux density at 1 GHz (/Jy): 3.5
• Spectral Index: varies

Radio: Incomplete shell.

References:

• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Reich 1982, A&A, 106, 314. Effelsberg 100-m at 2.7 GHz (4'.4: S=2.6±0.3 Jy) and 4.75 GHz (2'.5: S=1.75±0.2 Jy). ADS
• Dubner et al. 1996, AJ, 111, 1304. VLA at 1.4 GHz (68"×52": S=2.7±0.3 Jy). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 Aug 1998

G33.6+0.1 Kes 79, 4C00.70, HC13

• Right Ascension: 18 52 48
• Declination: +00 41
• Size (/arcmin): 10
• Type: S
• Flux density at 1 GHz (/Jy): 22
• Spectral Index: 0.5

Notes: Has been called G33.7+0.0.

Radio: Shell, with bright central region, in complex region.

X-ray: Centrally brightened.

Point sources: Central X-ray source.

Distance: HI absorption gives about 10 kpc.

References:

• Caswell et al. 1975, AuJPA, 37, 39. Molonglo at 408 MHz (3': S=35.5 Jy) and Parkes 64-m at 5 GHz (4': S=7.8 Jy). ADS
• Caswell et al. 1975, A&A, 45, 239. HI absorption. ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_{430 MHz}=69±33 Jy. ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3': S=6.8±1.5 Jy). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=11.4±1.1 Jy). ADS
• Caswell et al. 1981, MNRAS, 195, 89. FIRST at 1415 MHz (1'), plus observations of the nearby point source. ADS
• van Gorkom et al. 1982, MNRAS, 198, 757. WSRT HI absorption to nearby point source, possibly extragalactic. ADS
• Seaquist & Gilmore 1982, AJ, 87, 378. VLA observations of nearby source, plus Einstein observations. ADS
• Green 1989, MNRAS, 238, 737. OH absorption. ADS
• Frail & Clifton 1989, ApJ, 336, 854. VLA at 1.4 GHz (1'×2'.9), including HI absorption. ADS
• Velusamy et al. 1991, AJ, 102, 676. VLA at 327 MHz (1'), 1.5 (7"×14") and 5 GHz (7"), including spectral comparison. ADS
• Green & Dewdney 1992, MNRAS, 254, 686. Observations of adjacent molecular material. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.6×3'.8: S=34.8 Jy). ADS
• Seward & Velusamy 1995, ApJ, 439, 715. ROSAT observations. ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Koralesky et al. 1998, AJ, 116, 1323. VLA search for OH emission. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS
• Tsunemi & Enoguchi 2002, PASJ, 54, 735. ASCA observations. ADS
• Seward et al. 2003, ApJ, 584, 414. Chandra observations. ADS
• Stanimirovic 2003, ApJ, 592, 953. Arecibo OH absorption. ADS

Last updated: 23 Jan 2004

G34.7-0.4 W44, 3C392

• Right Ascension: 18 56 00
• Declination: +01 22
• Size (/arcmin): 35×27
• Type: C
• Flux density at 1 GHz (/Jy): 230
• Spectral Index: 0.30

Notes: Has been called G34.6-0.5.

Radio: Distorted shell, brighter to the E, with pulsar and associated nebula.

Optical: Diffuse emission.

X-ray: Centrally concentrated, thermal spectrum, plus pulsar wind nebula.

Point sources: Pulsar within the boundary of the remnant.

Distance: HI absorption indicates 2.5 kpc.

References:

• Kundu & Velusamy 1972, A&A, 20, 237. NRAO 140-ft at 10.7 GHz (3': S=105±7 Jy). ADS
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=177±10 Jy). ADS
• Caswell et al. 1975, A&A, 45, 239. HI absorption. ADS
• Clark et al. 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=299 Jy). ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_{430 MHz}=540±187 Jy. ADS
• Dickel & Milne 1976, AuJPh, 29, 435. Comparison of earlier Parkes 64-m maps at 2.7 GHz (8'.4) and 5 GHz (4'.4). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Smith et al. 1985, MNRAS, 217, 99. Einstein observations. ADS
• Wolszczan et al. 1991, ApJ, 372, L99. Pulsar detection. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.6×3'.8: S=469 Jy). ADS
• Jones et al. 1993, MNRAS, 265, 631. VLA at 1.4 GHz (15"), plus X-ray spectra. ADS
• Rho et al. 1994, ApJ, 430, 757. Optical and ROSAT observations. ADS
• Koo & Heiles 1995, ApJ, 442, 679. HI of surrounding shell. ADS
• Esposito et al. 1996, ApJ, 461, 820. Possible associated gamma-ray emission. ADS
• Harrus et al. 1996, ApJ, 464, L161. ASCA observations. ADS
• Frail et al. 1996, ApJ, 464, L165. VLA at 1.5 and 8.4 GHz (8".9×7".8) of pulsar nebula. ADS
• Frail et al. 1996, AJ, 111, 1651. OH maser emission. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Reach & Rho 1996, A&A, 315, L277. ISO spectroscopy. ADS
• Harrus et al. 1997, ApJ, 488, 781. X-ray observations. ADS
• Claussen et al. 1997, ApJ, 489, 143. VLA of associated OH masers. ADS
• Giacani et al. 1997, AJ, 113, 1379. VLA at 1.4 GHz (15"), plus optical images. ADS
• Seta et al. 1998, ApJ, 505, 286. CO observations of surroundings. ADS
• Cox et al. 1999, ApJ, 524, 179. Revision of distance. ADS
• Roberts et al. 2001, ApJS, 133, 451. ASCA observations. ADS
• Petre et al. 2002, ApJ, 579, 404. Chandra observations of pulsar and wind nebula. ADS
• Mavromatakis et al. 2003, A&A, 405, 591. Optical observations. ADS

Last updated: 27 Jan 2004

G36.6-0.7

• Right Ascension: 19 00 35
• Declination: +02 56
• Size (/arcmin): 25?
• Type: S?
• Flux density at 1 GHz (/Jy): ?
• Spectral Index: ?

Radio: Polarized arc, possibly part of a larger shell?

References:

• Fürst et al. 1987, A&AS, 69, 403. Effelsberg 100-m at 4.75 GHz (2'.4), plus other flux densities. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.4×3'.7: S=6.7 Jy). ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS

Last updated: 13 Aug 1998

G36.6+2.6

• Right Ascension: 18 48 49
• Declination: +04 26
• Size (/arcmin): 17×13?
• Type: S
• Flux density at 1 GHz (/Jy): 0.7?
• Spectral Index: 0.5?

Radio: Poorly resolved shell.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS

Last updated: 19th May 1992

G39.2-0.3 3C396, HC24, NRAO 593

• Right Ascension: 19 04 08
• Declination: +05 28
• Size (/arcmin): 8×6
• Type: C
• Flux density at 1 GHz (/Jy): 18
• Spectral Index: 0.6

Radio: Shell, brighter to W, with faint `tail' to E.

X-ray: Diffuse, brighter to W, with central core.

Point sources: Central X-ray source.

Distance: HI absorption suggests at least 7.7 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3'). ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_{430 MHz}=54±38 Jy. ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3': S=4.1±1.0 Jy). ADS
• Caswell et al. 1975, A&A, 45, 239. HI absorption. ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Caswell et al. 1982, MNRAS, 200, 1143. FIRST at 1.4 GHz (65"×48"). ADS
• Becker & Helfand 1987, AJ, 94, 1629. VLA at 1.4 GHz (12": S=14 Jy) and 5 GHz, plus Einstein observations. ADS
• Patnaik et al. 1990, A&A, 232, 467. VLA at 1.5 GHz (25") and 1.4 GHz (7".8×7".5) and 5 GHz (25") including polarization, plus Ooty at 327 MHz (100"×31"), including review of flux densities. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.5×3'.6: S=42.5 Jy). ADS
• Anderson & Rudnick 1993, ApJ, 408, 514. VLA at 1.45 and 4.89 GHz for spectral index studies. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Koralesky et al. 1998, AJ, 116, 1323. VLA search for OH emission. ADS
• Harrus & Slane 1999, ApJ, 516, 811. ASCA observations. ADS
• Aharonian et al. 2001, A&A, 375, 1008. Limit on high energy gamma-rays. ADS
• Olbert et al. 2003, ApJ, 592, L45. Chandra observations. ADS

Last updated: 11 Jan 2004

G39.7-2.0 W50, SS433

• Right Ascension: 19 12 20
• Declination: +04 55
• Size (/arcmin): 120×60
• Type: ?
• Flux density at 1 GHz (/Jy): 85?
• Spectral Index: 0.7?

Notes: Eastern part has been called G40.0-3.1. Is this a SNR?

Radio: Elongated shell, containing SS433, adjacent to the HII region S74.

Optical: Faint filaments at the edge of the radio emission.

X-ray: Emission from SS433 and two lobes.

Point sources: SS433 is the compact source in the centre of the W50.

Distance: Distance to SS433 is 5 kpc.

References:

• van den Bergh 1980, ApJ, 236, L23. Optical in Halpha and [SII]. ADS
• Zealey et al. 1980, MNRAS, 192, 731. Optical spectra. ADS
• van Gorkom et al. 1982, MNRAS, 198, 757. WSRT HI absorption to nearby point source (not SS433). ADS
• Seaquist & Gilmore 1982, AJ, 87, 378. VLA observations of nearby source. ADS
• Watson et al. 1983, ApJ, 273, 688. X-ray observations. ADS
• Downes et al. 1986, MNRAS, 218, 393. Effelsberg 100-m at 4.75 GHz (2'.4: S=34±4 Jy), plus previous 1.7 and 2.7 GHz data. ADS
• Romney et al. 1987, ApJ, 321, 822. VLBI of SS433, including distance. ADS
• Elston & Baum 1987, AJ, 94, 1633. Mosaic with VLA at 1.4 GHz (30") of fine structure only. ADS
• Kawai et al. 1989, PASJ, 41, 491. X-ray observations of SS433. ADS
• Band 1989, ApJ, 336, 937. Einstein and EXOSAT observations. ADS
• Yamauchi et al. 1994, PASJ, 46, L109. X-ray spectral observations. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Brinkmann et al. 1996, A&A, 312, 306. ROSAT observations. ADS
• Kotami et al. 1996, PASJ, 48, 619. X-ray line emission from SS433. ADS
• Safi-Harb & Ögelman 1997, ApJ, 483, 868. ROSAT observations. ADS
• Dubner et al. 1998, AJ, 116, 1842. VLA at 328 MHz (64"×60": S=160±20 Jy), and 1.4 GHz (56"×54"), plus NRAO 140-ft at 1.4 GHz (21') for HI observations. ADS
• Safi-Harb & Petre 1999, ApJ, 512, 784. X-ray observations. ADS
• Aharonian et al. 2001, A&A, 375, 1008. Limit on high energy gamma-rays. ADS

Last updated: 17 Oct 2001

G40.5-0.5

• Right Ascension: 19 07 10
• Declination: +06 31
• Size (/arcmin): 22
• Type: S
• Flux density at 1 GHz (/Jy): 11
• Spectral Index: 0.5

Radio: Shell, brightest to the NE.

References:

• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Downes et al. 1980, A&A, 92, 47. Effelsberg 100-m at 1.7 GHz (7'.6: S=9.3±1.3 Jy), and 2.7 GHz (4'.4: S=7.2±0.5 Jy), plus review of flux densities. ADS
• Aharonian et al. 2001, A&A, 375, 1008. Limit on high energy gamma-rays. ADS

Last updated: 17 Oct 2001

G41.1-0.3 3C397

• Right Ascension: 19 07 34
• Declination: +07 08
• Size (/arcmin): 4.5×2.5
• Type: S
• Flux density at 1 GHz (/Jy): 22
• Spectral Index: 0.48

Radio: 3C397 is two sources: the E is the SNR, the W is a HII region.

X-ray: Brighter to the E and W, with possible central component.

Distance: Possible limit of >7.5 kpc for non-thermal component from HI absorption.

References:

• Kundu et al. 1974, AJ, 79, 132. NRAO 140-ft at 10 GHz (3') and 5 GHz (6'). ADS
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=21.3±1.2 Jy for both components). ADS
• Caswell et al. 1975, A&A, 45, 239. HI absorption. ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_{430 MHz}=82±51 Jy, also Algonquin 46-m at 10.6 GHz (3': S=12±2 Jy), and Haystack 36-m at 15.5 GHz (2'.3: S=8.5±3.0 Jy). ADS
• Caswell et al. 1975, AuJPA, 37, 39. Molonglo at 408 MHz (3': S=29.8 Jy) and Parkes 64-m at 5 GHz (4': S=8.7 Jy). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Caswell et al. 1982, MNRAS, 200, 1143. FIRST at 1.4 GHz (58"×52"). ADS
• Becker et al. 1985, ApJ, 296, 461. VLA at 1.4 and 5 GHz (8"), plus Einstein observations. ADS
• Morsi & Reich 1987, A&AS, 71, 189. Effelsberg 100-m at 32 GHz (smoothed to 30": S=1.10±0.19 Jy). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.5×3'.6: S=46.3 Jy). ADS
• Anderson & Rudnick 1993, ApJ, 408, 514. VLA at 1.45 and 4.89 GHz, for spectral index studies. ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Chen et al. 1999, ApJ, 520, 737. ASCA and ROSAT observations. ADS
• Dyer & Reynolds 1999, ApJ, 526, 365. VLA at 1.5 GHz (6".9×6".6) and 4.8 GHz (46".4×5".6), including polarization and comparison with ROSAT image. ADS
• Safi-Harb et al. 2000, ApJ, 545, 922. ROSAT, ASCA and other X-ray observations. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS
• Aharonian et al. 2001, A&A, 375, 1008. Limit on high energy gamma-rays. ADS

Last updated: 27 Jan 2004

G42.8+0.6

• Right Ascension: 19 07 20
• Declination: +09 05
• Size (/arcmin): 24
• Type: S
• Flux density at 1 GHz (/Jy): 3?
• Spectral Index: 0.5?

Notes: Has been called G42.8+0.65.

Radio: Faint shell.

Point sources: Near soft gamma repeater, and young pulsar.

References:

• Fürst et al. 1987, A&AS, 69, 403. Effelsberg 100-m at 4.75 GHz (2'.4: S=1.5±0.2 Jy), plus other flux densities. ADS
• Vasisht et al. 1994, ApJ, 431, L35. VLA at 327 MHz (3'.2×3'.4). ADS
• Hurley et al. 1996, ApJ, 463, L13. Observations of soft gamma repeater field. ADS
• Lorimer & Xilouris 2000, ApJ, 545, 385. Pulsar detection. ADS
• Aharonian et al. 2001, A&A, 375, 1008. Limit on high energy gamma-rays. ADS
• Kaplan et al. 2002, ApJ, 566, 378. VLA at 333 MHz (50"), and other observations of the region. ADS

Last updated: 11 Jan 2004

G43.3-0.2 W49B

• Right Ascension: 19 11 08
• Declination: +09 06
• Size (/arcmin): 4×3
• Type: S
• Flux density at 1 GHz (/Jy): 38
• Spectral Index: 0.48

Radio: Shell, brightest to the SE and W, near the HII region W49A.

X-ray: Filled-centre.

Distance: HI absorption indicates 12.5 to 14 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 2.7 GHz (4'). ADS
• Downes & Wilson 1974, A&A, 34, 133. Effelsberg 100-m at 10.7 GHz (1'.3). ADS
• Green et al. 1975, A&A, 44, 187. Effelsberg 100-m at 15.0 GHz (58": S=9.0±0.7 Jy). ADS
• Lockhart & Goss 1978, A&A, 67, 355. HI absorption. ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Pye et al. 1984, MNRAS, 207, 649. Einstein observations, and VLA at 1.4 and 5 GHz (both 12"). ADS
• Smith et al. 1985, ApJ, 296, 469. EXOSAT spectrum. ADS
• Morsi & Reich 1987, A&AS, 71, 189. Effelsberg 100-m at 32 GHz (smoothed to 30": S=6.90±0.38 Jy). ADS
• Moffett & Reynolds 1994, ApJ, 437, 705. VLA at 330 MHz (6".7×7".7: S=64.4 Jy), 1.48 GHz (4".8×5".2: S=31.8 Jy) and 4.85 GHz (4".0×4".1), including polarization. ADS
• Fujimoto et al. 1995, PASJ, 47, L31. ASCA observations. ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Hwang et al. 2000, ApJ, 532, 970. ROSAT image and ASCA spectroscopy. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS
• Aharonian et al. 2001, A&A, 375, 1008. Limit on high energy gamma-rays. ADS
• Brogan & Troland 2001, ApJ, 550, 799. VLA at 1.4 GHz (27"×24" and 5") for HI Zeeman splitting. ADS
• Lacey et al. 2001, ApJ, 559, 954. VLA at 74 MHz (26"×23": S=55.6 Jy) and 326 MHz (6".6×6".2: S=56.0 Jy). ADS
• Kaplan et al. 2002, ApJ, 566, 378. VLA at 333 MHz (50"), and other observations of the region. ADS

Last updated: 23 Jan 2004

G43.9+1.6

• Right Ascension: 19 05 50
• Declination: +10 30
• Size (/arcmin): 60?
• Type: S?
• Flux density at 1 GHz (/Jy): 8.6?
• Spectral Index: 0.2?

Radio: Large, poorly defined faint shell.

Point sources: Soft gamma repeater nearby.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters. ADS
• Reich et al. 1990, A&AS, 85, 633. Effelsberg 100-m at 2.7 GHz (4'.3). ADS
• Vasisht et al. 1994, ApJ, 431, L35. VLA at 327 MHz (3'.2×3'.4). ADS
• Hurley et al. 1996, ApJ, 463, L13. Observations of soft gamma repeater field. ADS
• Kaplan et al. 2002, ApJ, 566, 378. VLA at 333 MHz (50"), and other observations of the region. ADS

Last updated: 11 Jan 2004