Note: this is an archived version which has been superseded.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 42 33
• Declination: -28 59
• 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)=77, S(5.0)=31. 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

Last updated: 20 AUG 1996

G0.3+0.0

• Right Ascension: 17 43 05
• Declination: -28 37
• 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

Last updated: 14 AUG 1998

G0.9+0.1

• Right Ascension: 17 44 12
• Declination: -28 08
• 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.

References:

• Helfand & Becker 1987, ApJ, 314, 203. VLA at 1.4 and 5 GHz, and IPC 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

Last updated: 13 AUG 1998

G1.0-0.1

• Right Ascension: 17 46 20
• Declination: -28 25
• 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.

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). 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

Last updated: 13 AUG 1998

G1.4-0.1

• Right Ascension: 17 46 30
• Declination: -27 45
• 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). ADS

Last updated: 30 JUN 1995

G1.9+0.3

• Right Ascension: 17 45 37
• Declination: -27 09
• 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 52 20
• Declination: -25 50
• Size (/arcmin): 11×14
• 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). ADS
• Gaensler 1998, ApJ, 493, 781. VLA at 1.4 GHz (9"×15": S=1.7±0.1). ADS

Last updated: 13 AUG 1998

G3.8+0.3

• Right Ascension: 17 49 50
• Declination: -25 27
• Size (/arcmin): 18
• Type: S?
• Flux density at 1 GHz (/Jy): 4?
• Spectral Index: ?

Radio: Incomplete shell.

References:

• Gray 1994, MNRAS, 270, 847. MOST at 843 MHz (43"×100": S=3.5). ADS

Last updated: 30 JUN 1995

G4.2-3.5

• Right Ascension: 18 05 45
• Declination: -27 04
• 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.
• 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 27 42
• Declination: -21 27
• 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: Historical observations indicate about 4.4 kpc.

References:

• van den Bergh & Kamper 1977, ApJ, 218, 617. Optical proper motions. ADS
• Leibowitz & Danziger 1983, MNRAS, 204, 273. Optical spectra. ADS
• Danziger & Goss 1980, MNRAS, 190, 47P. Revision of distance. ADS
• White & Long 1983, ApJ, 264, 196. IPC 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 HRI map (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

Last updated: 13 AUG 1998

G5.2-2.6

• Right Ascension: 18 04 25
• 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.
• 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: 17 59 00
• Declination: -24 55
• 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.

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). 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). 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. Suggest it is not SNR, see Helfand & Becker 1985, Natur, 313, 118. 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) and 8.4 GHz (3': S=24±3), including polarization. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.0×4'.9: S=38). 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

Last updated: 13 AUG 1998

G5.9+3.1

• Right Ascension: 17 44 20
• Declination: -22 15
• 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).

Last updated: 19th May 1992

G6.1+1.2

• Right Ascension: 17 51 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.
• 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: 17 57 30
• Declination: -23 25
• Size (/arcmin): 42
• 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.

Distance: Uncertain mean optical velocity indicates 3.5--4 kpc.

References:

• Kundu & Velusamy 1972, A&A, 20, 237. NRAO 140-ft at 10 GHz (3').
• van den Bergh et al. 1973, ApJS, 26, 19. Optical.
• 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 HRI 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. IPC and optical observations. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.1×4'.4: S=660). 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

Last updated: 13 AUG 1998

G6.4+4.0

• Right Ascension: 17 42 10
• Declination: -21 20
• 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).

Last updated: 19th May 1992

G7.7-3.7 1814-24

• Right Ascension: 18 14 20
• Declination: -24 05
• 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), 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), including polarization. ADS

Last updated: 20 AUG 1996

G8.7-5.0

• Right Ascension: 18 21 05
• Declination: -23 50
• 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.
• 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 02 35
• Declination: -21 25
• 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). 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), 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 02 10
• 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). ADS
• Dubner et al. 1993, AJ, 105, 2251. VLA at 1.47 GHz (41"×63": S=3.5±0.4). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 AUG 1998

G10.0-0.3

• Right Ascension: 18 05 40
• Declination: -20 26
• Size (/arcmin): 8?
• Type: ?
• Flux density at 1 GHz (/Jy): 2.9
• Spectral Index: 0.8

Radio: Not well resolved.

X-ray: X-ray pulsar.

Point sources: X-ray pulsar associated with soft gamma repeater.

Distance: Association with W31 gives 14.5 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4').
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Kulkarni & Frail 1993, Natur, 365, 33. VLA at 330 MHz (smoothed to 2') and 1.49 GHz (40"×65"), including association with soft gamma repeater. ADS
• Sonobe et al. 1994, ApJ, 436, L23. X-ray observations. ADS
• Kulkarni et al. 1994, Natur, 368, 129. VLA at 1.4 GHz (31") and 8.4 GHz (5".5) ADS
• Vasisht et al. 1995, ApJ, 440, L65. Radio monitoring of core. ADS
• Frail et al. 1996, AJ, 111, 1651. OH emission near remnant. ADS
• Corbel et al. 1997, ApJ, 478, 624. CO observations of surroundings. ADS
• Frail et al. 1997, ApJ, 480, L129. VLA monitoring of changing core. ADS
• Kouveliotou et al. 1998, Natur, 393, 235. X-ray pulsar detection. ADS

Last updated: 17 AUG 1998

G11.2-0.3

• Right Ascension: 18 08 30
• Declination: -19 26
• Size (/arcmin): 4
• Type: C
• Flux density at 1 GHz (/Jy): 22
• Spectral Index: 0.49

Notes: Probably associated with the SN of AD386.

Radio: Symmetrical clumpy shell, possibly with flatter spectrum core.

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

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').
• Radhakrishnan et al. 1972, ApJS, 24, 49. HI absorption.
• 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 HRI observations, with review of flux densities. ADS
• Becker et al. 1985, ApJ, 296, 461. VLA at 1.4 and 5 GHz, plus HI absorption, HRI and IPC observations. ADS
• Morsi & Reich 1987, A&AS, 71, 189. Effelsberg 100-m at 32 GHz (26".5: S=4.04±0.24). 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). 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

Last updated: 17 AUG 1998

G11.4-0.1

• Right Ascension: 18 07 50
• Declination: -19 06
• 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) contaminated by sidelobes of a nearby source, and Parkes 64-m at 5 GHz (4': S=2.8). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=2.0±0.4). 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'.2×4'.1: S=18). ADS
• Dubner et al. 1993, AJ, 105, 2251. VLA at 1.47 GHz (44"×63": S=5.1±0.6). 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 09 15
• Declination: -18 38
• Size (/arcmin): 7?
• Type: ?
• Flux density at 1 GHz (/Jy): 3.5
• Spectral Index: 0.7

Radio: Incomplete shell, defined in E only.

References:

• Clark et al. 1975, AuJPA, 37, 1. Molonglo at 408 MHz (3': S=6.6) and Parkes 64-m at 5 GHz (4': S=1.1). 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). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 AUG 1998

G13.3-1.3

• Right Ascension: 18 16 30
• Declination: -18 01
• Size (/arcmin): 70×40
• Type: S?
• Flux density at 1 GHz (/Jy): ?
• Spectral Index: ?

Radio: Amporphous 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

Last updated: 13 AUG 1998

G13.5+0.2

• Right Ascension: 18 11 20
• Declination: -17 13
• 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) and 1.4 GHz (15": S=2.67±0.5). 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 21 05
• Declination: -16 36
• 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.
• 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 16 00
• Declination: -15 03
• 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) and Parkes 64-m at 5 GHz (4': S=1.9). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=1.1±0.2). 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), 1.4 GHz (23"×14": S=3.9±0.1) 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

G16.7+0.1

• Right Ascension: 18 18 05
• Declination: -14 21
• 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.

References:

• Helfand et al. 1989, ApJ, 341, 151. VLA at 5 GHz (5: S=0.95) and 1.4 GHz (15": S=2.43) and OSRT at 327 MHz (S=5.13). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations, including masers. ADS

Last updated: 13 AUG 1998

G16.8-1.1

• Right Ascension: 18 22 30
• Declination: -14 48
• 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 28 05
• Declination: -14 54
• Size (/arcmin): 24?
• Type: S
• Flux density at 1 GHz (/Jy): 4.8?
• Spectral Index: 0.8?

Radio: Incomplete, poorly defined shell.

References:

• Reich et al. 1988, in SNRISM, p293. Summary of parameters.
• 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

G17.8-2.6

• Right Ascension: 18 30 00
• Declination: -14 41
• 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.
• 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 21 10
• Declination: -12 25
• 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).
• Clark et al. 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=38). 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), including polarization. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (2'.9×3'.5: S=55). ADS
• Dubner et al. 1996, AJ, 111, 1304. VLA at 1.4 GHz (75"×55": S=29.9±0.3). ADS

Last updated: 11 AUG 1996

G18.9-1.1

• Right Ascension: 18 27 00
• Declination: -13 00
• 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), plus other flux densities. ADS
• Odegard 1986, AJ, 92, 1372. TPT at 57.5 MHz (7'.2×8': S=82±15), plus review of flux densities. ADS
• Barnes & Turtle 1988, in SNRISM, p347. Molonglo at 408 MHz (2'.9×3'.1: S=58±9) and Parkes 64-m at 5 GHz (4'.4×4'.1: S=23±6).
• Patnaik et al. 1988, Natur, 332, 136. OSRT 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) 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: 13 AUG 1998

G20.0-0.2

• Right Ascension: 18 25 20
• Declination: -11 37
• 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), 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 30 47
• Declination: -10 37
• Size (/arcmin): 1.2
• Type: F
• Flux density at 1 GHz (/Jy): 6
• Spectral Index: 0.0

Radio: Filled-centre, with high frequency turnover.

X-ray: Detected, with power-law spectrum.

Distance: HI absorption indicates 5.5 kpc.

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 HRI and IPC 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). 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) and 141.9 GHz (S=2.5±1.2). ADS
• Salter et al. 1989, ApJ, 338, 171. NRAO 12-m at 84.2 GHz (S=3.94±0.70), 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). 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

Last updated: 13 AUG 1998

G21.8-0.6 Kes 69

• Right Ascension: 18 30 00
• Declination: -10 10
• 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').
• Wilson 1972, A&A, 19, 354. H₂CO absorption.
• Kundu et al. 1974, AJ, 79, 1332. NRAO 140-ft at 5 GHz (6') and 10 GHz (3').
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft et 2.7 GHz (5': S=42.3±4.6).
• 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. IPC observations. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.3×3'.5: S=132). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations, including masers. ADS

Last updated: 13 AUG 1998

G22.7-0.2

• Right Ascension: 18 30 30
• Declination: -09 15
• 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').
• 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). 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 32 00
• Declination: -08 50
• 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').
• 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). 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 30 20
• Declination: -08 15
• 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').
• 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 36 00
• Declination: -07 35
• 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) and Parkes 64-m at 5 GHz (4': S=3.6). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=2.2±0.5). 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). 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 31 30
• Declination: -07 07
• 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').
• 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) and 4.75 GHz (2'.4: S=17±4) and NRO 45-m at 10.2 GHz (2'.7: S=15±3). 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 38 40
• Declination: -04 59
• 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 compact source.

Point sources: Central long period pulsar.

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').
• 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). 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). ADS
• Caswell et al. 1982, MNRAS, 200, 1143. FIRST at 1415 MHz (60"×45": S=3.5). Revise S(408)=10.4, and S(5000)=1.9±0.2. ADS
• Kriss et al. 1985, ApJ, 288, 703. IPC and HRI 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

Last updated: 17 AUG 1998

G27.8+0.6

• Right Ascension: 18 37 06
• Declination: -04 28
• 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), and 4.75 GHz (2'.4: S=18±2) and NRO 45-m at 10.2 GHz (smoothed to 4'.3: S=8.5±2). 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

G28.8+1.5

• Right Ascension: 18 36 30
• Declination: -02 40
• 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

Last updated: 30 JUN 1995

G29.7-0.3 Kes 75

• Right Ascension: 18 43 48
• Declination: -03 02
• 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.

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').
• Milne & Dickel 1974, AuJPh, 27, 549. Parkes 64-m at 2.7 GHz (8'.4: S=5±20%).
• 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 IPC and HRI. 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). 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). 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

Last updated: 13 AUG 1998

G30.7-2.0

• Right Ascension: 18 51 50
• Declination: -02 58
• 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.
• 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 42 10
• Declination: -01 35
• 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), plus other flux densities. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.6×3'.9: S=8.6). ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS

Last updated: 13 AUG 1998

G31.5-0.6

• Right Ascension: 18 48 35
• Declination: -01 35
• 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.

References:

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

Last updated: 25th February 1988

G31.9+0.0 3C391

• Right Ascension: 18 46 50
• Declination: -00 59
• Size (/arcmin): 5×7
• 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.
• 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) and Effelsberg 100-m at 10.7 GHz (77": S=7.5±0.8). ADS
• Wang & Seward 1984, ApJ, 279, 705. IPC and HRI observations. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.4×3'.7: S=44.8). 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) 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

Last updated: 13 AUG 1998

G32.0-4.9 3C396.1

• Right Ascension: 19 03 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%), 1410 MHz (15': S=19±15%) and 2650 MHz (8'.4: S=8.6±30%). Fluxes if size is 60', plus review of flux densities.
• Caswell 1970, AuJPh, 23, 105. Revision of low frequency flux densities.
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo at 111 MHz (S=105±30). ADS

Last updated: 25th February 1988

G32.1-0.9

• Right Ascension: 18 50 30
• Declination: -01 12
• 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 48 50
• Declination: -00 12
• 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).
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo at 430 MHz (S=19.0±15.5). 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) and Parkes 64-m at 5 GHz (4': S=7.7). 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). ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 13 AUG 1998

G33.2-0.6

• Right Ascension: 18 51 12
• Declination: -00 05
• 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) and 4.75 GHz (2'.5: S=1.75±0.2). ADS
• Dubner et al. 1996, AJ, 111, 1304. VLA at 1.4 GHz (68"×52": S=2.7±0.3). 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 50 15
• Declination: +00 37
• 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: Detected.

Distance: HI absorption gives about 10 kpc.

References:

• Caswell et al. 1975, AuJPA, 37, 39. Molonglo at 408 MHz (3': S=35.5) and Parkes 64-m at 5 GHz (4': S=7.8). ADS
• Caswell et al. 1975, A&A, 45, 239. HI absorption. ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S(430)=69±33. ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3': S=6.8±1.5). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=11.4±1.1). 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 IPC 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). 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

Last updated: 13 AUG 1998

G34.7-0.4 W44, 3C392

• Right Ascension: 18 53 30
• Declination: +01 18
• Size (/arcmin): 35×27
• Type: S
• 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.

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

Point sources: Pulsar within the boundary of the remnant.

Distance: HI absorption indicates 3 kpc.

References:

• Kundu & Velusamy 1972, A&A, 20, 237. NRAO 140-ft at 10.7 GHz (3': S=105±7).
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=177±10).
• 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 which is less than the 390 Jy found by Kesteven 1968, AuJPh, 21, 739 with the same telescope). ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S(430)=540±187. 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. IPC 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). 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
• Caussen 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

Last updated: 19 AUG 1998

G36.6-0.7

• Right Ascension: 18 58 05
• Declination: +02 52
• 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). ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS

Last updated: 13 AUG 1998

G36.6+2.6

• Right Ascension: 18 46 20
• Declination: +04 23
• 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.
• 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 01 40
• Declination: +05 23
• Size (/arcmin): 8×6
• Type: S
• Flux density at 1 GHz (/Jy): 18
• Spectral Index: 0.6

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

X-ray: Centrally brightened.

Distance: HI absorption suggests at least 7.7 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3').
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S(430)=54±38. ADS
• Becker & Kundu 1975, AJ, 80, 679. NRAO 140-ft at 10.6 GHz (3': S=4.1±1.0). 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) and 5 GHz, plus IPC 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 OSRT 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). 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

Last updated: 13 AUG 1998

G39.7-2.0 W50, SS433

• Right Ascension: 19 10 00
• Declination: +04 50
• 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), 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
• Safi-Harb & Ögelman 1997, ApJ, 483, 868. ROSAT observations. ADS

Last updated: 13 AUG 1998

G40.5-0.5

• Right Ascension: 19 04 45
• Declination: +06 26
• 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), and 2.7 GHz (4'.4: S=7.2±0.5), plus review of flux densities. ADS

Last updated: 25th February 1988

G41.1-0.3 3C397

• Right Ascension: 19 05 08
• Declination: +07 03
• 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.

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

References:

• Kundu et al. 1974, AJ, 79, 1332. NRAO 140-ft at 10 GHz (3') and 5 GHz (6').
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=21.3±1.2 for both components).
• Caswell et al. 1975, A&A, 45, 239. HI absorption. ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S(430)=82±51, also Algonquin 46-m at 10.6 GHz (3': S=12±2), and Haystack 36-m at 15.5 GHz (2'.3: S=8.5±3.0). ADS
• Caswell et al. 1975, AuJPA, 37, 39. Molonglo at 408 MHz (3': S=29.8) and Parkes 64-m at 5 GHz (4': S=8.7). 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 HRI and IPC observations. ADS
• Morsi & Reich 1987, A&AS, 71, 189. Effelsberg 100-m at 32 GHz (smoothed to 30": S=1.10±0.19). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.5×3'.6: S=46.3). 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

Last updated: 13 AUG 1998

G42.8+0.6

• Right Ascension: 19 04 55
• Declination: +09 00
• 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.

References:

• Fürst et al. 1987, A&AS, 69, 403. Effelsberg 100-m at 4.75 GHz (2'.4: S=1.5±0.2), 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

Last updated: 13 AUG 1998

G43.3-0.2 W49B

• Right Ascension: 19 08 44
• Declination: +09 01
• 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 10 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 2.7 GHz (4').
• Downes & Wilson 1974, A&A, 34, 133. Effelsberg 100-m at 10.7 GHz (1'.3).
• Caswell et al. 1975, A&A, 45, 239. HI absorption. ADS
• Green et al. 1975, A&A, 44, 187. Effelsberg 100-m at 15.0 GHz (58": S=9.0±0.7). 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. HRI and IPC 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). ADS
• Moffett & Reynolds 1994, ApJ, 437, 705. VLA at 330 MHz (6".7×7".7: S=64.4), 1.48 GHz (4".8×5".2: S=31.8) 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

Last updated: 13 AUG 1998

G43.9+1.6

• Right Ascension: 19 03 30
• Declination: +10 25
• 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.
• 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

Last updated: 13 AUG 1998