Note: this is an archived version which has been superseded.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 (45°<l<90°)

G45.7-0.4

Right Ascension: 19 16 25
Declination: +11 09
Size (/arcmin): 22
Type: S
Flux density at 1 GHz (/Jy): 4.2?
Spectral Index: 0.4?

Radio: Shell, brightest to the SE, poorly defined to NW.

References:

Fürst et al. 1987, A&AS, 69, 403. Effelsberg 100-m at 4.75 GHz (2'.4: S=2.6±0.3 Jy), plus other flux densities. ADS
Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS

Last updated: 13 Aug 1998

G46.8-0.3 (HC30)

Right Ascension: 19 18 10
Declination: +12 09
Size (/arcmin): 17×13
Type: S
Flux density at 1 GHz (/Jy): 14
Spectral Index: 0.5

Notes: Has been called G46.6-0.2.

Radio: Shell, two bright arcs to NNW and SSE.
Distance: HI absorption suggests 6.8-8.8 kpc.

References:

Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=9.8±0.9 Jy), and VRO 37-m at 1.7 GHz (S=14.5±5.5 Jy). ADS
Caswell et al. 1975, AuJPA, 37, 39. Molonglo at 408 MHz (3': S=20.3 Jy) and Parkes 64-m at 5 GHz (4': S=7.1 Jy). ADS
Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_{430 MHz}=46±21 Jy. ADS
Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=5.9±0.6 Jy). ADS
Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
Dubner et al. 1996, AJ, 111, 1304. VLA at 1.4 GHz (58"×53": S=13.3±0.1 Jy). ADS

Last updated: 14 Aug 1998

G49.2-0.7 (W51)

Right Ascension: 19 23 50
Declination: +14 06
Size (/arcmin): 30
Type: S?
Flux density at 1 GHz (/Jy): 160?
Spectral Index: 0.3?

Radio: In complex region, parameters uncertain.
X-ray: Elongated east-west.
Optical: Some diffuse emission possibly associated.
Distance: HI absorption suggests 4.1 kpc.

References:

Shaver & Goss 1970, AuJPA, 14, 133. Parkes 64-m at 5 GHz (4'). ADS
Sato 1973, PASJ, 25, 135. HI absorption. ADS
Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5'), S=51.5±3.2 Jy, for the non-thermal component, but probably confused. 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
Copetti & Schmidt 1991, MNRAS, 250, 127. CLFST at 151 MHz. ADS
Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.1×3'.5). ADS
Subrahmanyan & Goss 1995, MNRAS, 275, 755. VLA at 330 MHz (1'.1). ADS
Koo et al. 1995, ApJ, 447, 211. ROSAT observations. ADS
Frail et al. 1996, AJ, 111, 1651. OH emission near remnant. ADS
Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
Green et al. 1997, AJ, 114, 2058. OH masers. ADS
Koo & Moon 1997, ApJ, 475, 194. Arecibo (3') and VLA (40"×42") at 1.4 GHz for HI. ADS
Koo & Moon 1997, ApJ, 485, 263. NRAO 12-m CO and HCO⁺ observations. ADS
Brogan et al. 2000, ApJ, 537, 875. VLA at 1.7 GHz for OH Zeeman splitting. ADS
Mavromatakis et al. 2001, A&A, 370, 265. Optical observations. ADS
Koo et al. 2002, AJ, 123, 1629. ASCA observations. ADS

Last updated: 7 Jan 2004

G53.6-2.2 3C400.2, NRAO 611

Right Ascension: 19 38 50
Declination: +17 14
Size (/arcmin): 33×28
Type: S
Flux density at 1 GHz (/Jy): 8
Spectral Index: 0.75

Notes: Has been called G53.7-2.2.

Radio: Ring of emission, with extension to NW.
Optical: Filaments and diffuse emission.
X-ray: Centrally brightened, offset to NW.
Distance: Mean optical velocity indicates 6.7 kpc, HI absorption indicates 2.3 kpc.

References:

Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=5.3±0.6 Jy). ADS
van den Bergh 1978, ApJS, 38, 119. Optical. ADS
Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=4.8±0.3 Jy). ADS
Clark et al. 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=11.7 Jy). ADS
Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_{430 MHz}=20±10 Jy, S_{318 MHz}=20±3.6 Jy. ADS
Goss et al. 1975, A&A, 43, 459. WSRT at 610 MHz (1'×3': S=13.2±1.6 Jy). ADS
Sabbadin & d'Odorico 1976, A&A, 49, 119. Optical spectra. ADS
Rosado 1983, RMxAA, 8, 59. Optical spectra. ADS
Blair & Long 1988, PASP, 100, 461. Optical imaging and spectroscopy. ADS
Long et al. 1991, ApJ, 373, 567. Einstein and optical observations. ADS
Winkler et al. 1993, ApJ, 405, 608. Optical imaging. ADS
Dubner et al. 1994, AJ, 108, 207. VLA at 327 MHz (59") and 1.49 GHz (52"), plus X-rays. ADS
Saken et al. 1995, ApJ, 443, 231. ROSAT observations. ADS
Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
Giacani et al. 1998, A&AS, 133, 61. DRAO at 1.4 GHz for HI studies, including distance. ADS
Yoshita et al. 2001, PASJ, 53, 93. ASCA observations, and spectral comparison with ROSAT. ADS

Last updated: 17 Oct 2001

G54.1+0.3

Right Ascension: 19 30 31
Declination: +18 52
Size (/arcmin): 1.5
Type: F?
Flux density at 1 GHz (/Jy): 0.5
Spectral Index: 0.1

Radio: Filled-centre.
X-ray: Centrally concentrated, with extensions and diffuse emission.
Point sources: Central pulsar.

References:

Green 1985, MNRAS, 216, 691. 5km at 2.7 GHz (7"×20"). ADS
Reich et al. 1985, A&A, 151, L10. Effelsberg 100-m at 4.75 GHz (2'.4: S=0.37±0.04 Jy) ADS
Velusamy & Becker 1988, AJ, 95, 1162. VLA at 1.4 (14": S=0.48±0.03 Jy), 1.6 (14": S=0.42±0.03 Jy) and 5 GHz (5": S=0.33±0.02 Jy), Ooty at 327 MHz (S=0.50±0.08 Jy), plus review of flux densities. ADS
Seward 1989, AJ, 97, 481. Einstein observations. 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
Lu et al. 2001, A&A, 370, 570. ROSAT and ASCA observations. ADS
Lu et al. 2002, ApJ, 568, L49. Chandra observations. ADS
Camilo et al. 2002, ApJ, 574, L71. Pulsar detection. ADS

Last updated: 7 Jan 2004

G54.4-0.3 (HC40)

Right Ascension: 19 33 20
Declination: +18 56
Size (/arcmin): 40
Type: S
Flux density at 1 GHz (/Jy): 28
Spectral Index: 0.5

Notes: Has been called G54.5-0.3.

Radio: Shell, in complex region.

References:

Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=34.4±5.0 Jy). ADS
Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
Caswell 1985, AJ, 90, 1224. DRAO at 1.4 GHz (1'.3×2'.6: S=18±4 Jy). ADS
Velusamy et al. 1986, JApA, 7, 105. WSRT at 609 MHz (50"×191" smoothed to 100"×200"). ADS
Junkes et al. 1992, A&AS, 96, 1. Surrounding CO. ADS
Junkes et al. 1992, A&A, 261, 289. Nearby IRAS sources. ADS

Last updated: 19 Aug 1998

G55.0+0.3

Right Ascension: 19 32 00
Declination: +19 50
Size (/arcmin): 20×15?
Type: S
Flux density at 1 GHz (/Jy): 0.5?
Spectral Index: 0.5?

Notes: Has been called G55.2+0.5.

Radio: Faint, partial shell.
Distance: Association with HI features implies 14 kpc.
Point sources: Old pulsar nearby.

References:

Matthews et al. 1998, ApJ, 493, 312. WSRT at 327 MHz (1'.0×2'.9: S=0.98±0.15 Jy), DRAO at 1.4 GHz (1'.0×2'.9: S=0.25±0.12 Jy), plus HI observations. ADS

Last updated: 18 Sep 1998

G55.7+3.4

Right Ascension: 19 21 20
Declination: +21 44
Size (/arcmin): 23
Type: S
Flux density at 1 GHz (/Jy): 1.4
Spectral Index: 0.6

Radio: Incomplete shell.
Point sources: Old pulsar within the boundary of the remnant.

References:

Goss et al. 1977, A&A, 61, 93. WSRT observations at 610 MHz (57"×156": S=1.9±0.2 Jy) and 1415 MHz (27"×72": S=1.0±0.1 Jy). ADS

Last updated: 05 Apr 1993

G57.2+0.8 (4C21.53)

Right Ascension: 19 34 59
Declination: +21 57
Size (/arcmin): 12?
Type: S?
Flux density at 1 GHz (/Jy): 1.8?
Spectral Index: ?

Radio: Extended non-thermal arc.
Point sources: Near the millisecond pulsar, but not thought to be related.

References:

Sieber & Seiradakis 1984, A&A, 130, 257. Effelsberg 100-m at 1.4 GHz (8'.8: 1.34±0.1), 2.7 GHz (4'.3: 0.86±0.1), plus other surveys of the area. ADS
Caswell et al. 1985, AJ, 90, 488. DRAO at 1.4 GHz (1'×3'). ADS

Last updated: 1st March 1988

G59.5+0.1

Right Ascension: 19 42 33
Declination: +23 35
Size (/arcmin): 5
Type: S
Flux density at 1 GHz (/Jy): 3?
Spectral Index: ?

Notes: Has been called G59.6+0.1.

Radio: Incomplete shell.

References:

Taylor et al. 1992, AJ, 103, 931. WSRT at 327 MHz (1'.0×2'.5: S=5.1±0.2 Jy), and northern sky survey at 4.9 GHz. ADS
Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS

Last updated: 14 Aug 1998

G59.8+1.2

Right Ascension: 19 38 55
Declination: +24 19
Size (/arcmin): 20×16?
Type: ?
Flux density at 1 GHz (/Jy): 1.6
Spectral Index: 0.5

Notes: Has been called G59.7+1.2.

Radio: Poorly defined source.

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

G63.7+1.1

Right Ascension: 19 47 52
Declination: +27 45
Size (/arcmin): 8
Type: F
Flux density at 1 GHz (/Jy): 1.8
Spectral Index: 0.3

Radio: Centrally brightened, with core.

References:

Wallace et al. 1997, AJ, 114, 2068. WSRT at 1.4 GHz (14"×26": S=1.63 Jy), DRAO at 1.4 GHz (smoothed to 2'), plus review of flux densities and other observations. ADS

Last updated: 13 Aug 1998

G65.1+0.6

Right Ascension: 19 54 40
Declination: +28 35
Size (/arcmin): 90×50
Type: S
Flux density at 1 GHz (/Jy): 6
Spectral Index: 0.6

Radio: Large, faint shell.
Point sources: Pulsar nearby.

References:

Landecker et al. 1990, A&A, 232, 207. DRAO at 408 MHz (3'.5×7'.0: S=9.5±0.1 Jy), and 1.4 GHz (1'.0×2'.0: S=5.4±1.0 Jy). ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS

Last updated: 13 Aug 1998

G65.3+5.7

Right Ascension: 19 33 00
Declination: +31 10
Size (/arcmin): 310×240
Type: S?
Flux density at 1 GHz (/Jy): 52?
Spectral Index: 0.6?

Notes: Has been called G65.2+5.7.

Radio: Large, faint ring? near S91 and S94.
Optical: Filamentary ring.
X-ray: Detected.
Distance: Mean optical velocity suggests 0.8 kpc.

References:

Gull et al. 1977, ApJ, 215, L69. Optical plates. ADS
Reich et al. 1979, A&A, 72, 270. Effelsberg 100-m observations at 1.42 GHz (smoothed to 11': S=42.4±1.6 Jy), estimate S_{408 MHz}=91±5 Jy from previous sky survey. ADS
Lozinskaya 1981, SvAL, 7, 17. Mean optical velocity. ADS
Rosado 1981, ApJ, 250, 222. Optical interferometry. ADS
Fesen et al. 1983, ApJS, 51, 337. Deep [OIII] imagery. ADS
Fesen et al. 1985, ApJ, 292, 29. Optical spectra. ADS
Seward 1990, ApJS, 73, 781. Einstein observations. ADS
Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
Mavromatakis et al. 2002, A&A, 388, 355. Optical observations. ADS

Last updated: 7 Jan 2004

G65.7+1.2 DA 495

Right Ascension: 19 52 10
Declination: +29 26
Size (/arcmin): 18
Type: ?
Flux density at 1 GHz (/Jy): 5.1
Spectral Index: 0.6

Notes: Has mistakenly been called G55.7+1.2.

Radio: Filled-centre or thick shell?

References:

Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=2.8±0.4 Jy), and VRO 37-m at 1.7 GHz (S=4.4±0.5 Jy), plus review of flux densities. ADS
Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_{430 MHz}=8.7±4.9 Jy, S_{318 MHz}=9.7±2.2 Jy. ADS
Landecker & Caswell 1983, AJ, 88, 1810. DRAO at 1.4 GHz (0'.9×1'.5: S=4.4±0.2 Jy). ADS
Velusamy et al. 1989, JApA, 10, 161. Ooty at 327 MHz (36"×64"), WSRT at 610 MHz (62") and VLA at 1.4 GHz (36" and 12"), including IRAS imaging. ADS
Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS

Last updated: 12 Oct 2001

G67.7+1.8

Right Ascension: 19 54 32
Declination: +31 29
Size (/arcmin): 9
Type: S
Flux density at 1 GHz (/Jy): 1.4
Spectral Index: 0.3

Radio: Double arc shell.
Optical: Filaments in N.

References:

Taylor et al. 1992, AJ, 103, 931. WSRT at 327 MHz (1'.9×1'.0: S=1.9±0.1 Jy), and northern sky survey at 4.9 GHz (S=0.42±0.05 Jy). ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS
Mavromatakis et al. 2001, A&A, 370, 265. Optical observations. ADS

Last updated: 17 Oct 2001

G68.6-1.2

Right Ascension: 20 08 40
Declination: +30 37
Size (/arcmin): 28×25?
Type: ?
Flux density at 1 GHz (/Jy): 0.7?
Spectral Index: 0.0?

Radio: Faint, poorly defined source.

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
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS

Last updated: 13 Aug 1998

G69.0+2.7 CTB 80

Right Ascension: 19 53 20
Declination: +32 55
Size (/arcmin): 80?
Type: ?
Flux density at 1 GHz (/Jy): 120?
Spectral Index: varies

Notes: An association with a SN in AD1408 has been suggested. Has been called G68.8+2.8. Is it a SNR?

Radio: Compact core, flat spectrum plateau, and steeper spectrum extensions, with spectral break?
Optical: Expanding nebulosity near centre, with filaments to the SW and far NE.
X-ray: Diffuse emission with compact source.
Point sources: Pulsar at western edge of core.

References:

Angerhofer et al. 1981, A&A, 94, 313. WSRT at 610 MHz (56"×103") 1.4 GHz (24"×44") and 5 GHz (7"×13"), plus optical. ADS
Becker et al. 1982, ApJ, 255, 557. X-ray observations. ADS
Sofue et al. 1983, PASJ, 35, 437. NRO 45-m at 10.2 GHz (2'.7). ADS
Velusamy & Kundu 1983, JApA, 3, 253. VLA of compact sources. ADS
Blair et al. 1984, ApJ, 282, 161. Optical images and spectra. ADS
Wang & Seward 1984, ApJ, 285, 607. Einstein observations. ADS
Strom et al. 1984, A&A, 139, 43. Radio observations of flat spectrum component, VLA 5 GHz (1".7) and 1.4 GHz. ADS
Mantovani et al. 1985, A&A, 145, 50. Bologna at 408 MHz (2'.6×4'.9: S=67.5±10.5 Jy), Effelsberg 100-m at 1.41 (9': S=62±9 Jy), 1.72 (7'.6: S=66±5 Jy), 2.7 (4'.5: S=52±4 Jy) and 4.75 GHz (2'.4: S=44±3.3 Jy), plus review of flux densities. ADS
Kulkarni et al. 1988, Natur, 331, 50. Pulsar detection. ADS
Angelini et al. 1988, ApJ, 330, L43. EXOSAT spectra. ADS
Fesen et al. 1988, Natur, 334, 229. IRAS of surrounding shell. ADS
Whitehead et al. 1989, MNRAS, 237, 1109. Optical of core. ADS
Salter et al. 1989, ApJ, 338, 171. NRAO 12-m at 84.2 GHz of core, plus review of flux densities. ADS
Hester & Kulkarni 1989, ApJ, 340, 362. Optical imaging and spectroscopy. ADS
Koo et al. 1990, ApJ, 364, 178. Large, expanding HI shell. ADS
Greidanus & Strom 1990, A&A, 240, 376. Optical kinematics of core. ADS
Koo et al. 1993, ApJ, 417, 196. VLA at 1.4 GHz of surrounding HI (1'), plus IRAS. ADS
Safi-Harb et al. 1995, ApJ, 439, 722. ROSAT observations. ADS
Srinivasan 1997, ApJ, 489, 170. gamma-ray observations of pulsar. ADS
Mavromatakis et al. 2001, A&A, 371, 300. Optical observations. ADS
Butler et al. 2002, A&A, 395, 845. HST detection of pulsar. ADS
Migliazzo et al. 2002, ApJ, 567, L141. Pulsar proper motion study. ADS
Castelletti et al. 2003, AJ, 126, 2114. GMRT at 240 and 618 MHz (26"×17" and 10"×6") and VLA at 324 and 1380 MHz (73"×63" and 93"×78"). ADS

Last updated: 11 Jan 2004

G69.7+1.0

Right Ascension: 20 02 40
Declination: +32 43
Size (/arcmin): 16
Type: S
Flux density at 1 GHz (/Jy): 1.6
Spectral Index: 0.8

Radio: Poorly resolved source.

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
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS

Last updated: 13 Aug 1998

G73.9+0.9

Right Ascension: 20 14 15
Declination: +36 12
Size (/arcmin): 22?
Type: S?
Flux density at 1 GHz (/Jy): 9?
Spectral Index: 0.3?

Radio: Diffuse, centrally brightened to SW.
Optical: Faint shell.

References:

Reich et al. 1986, A&A, 155, 185. Effelsberg 100-m at 4.75 GHz (2'.4: S=6.7±0.5 Jy), plus other flux densities. ADS
Chastenay & Pineault 1988, in SNRISM, p297. DRAO at 408 MHz (3'.5×5'.9) and 1.4 GHz (1'.0×1'.7). ADS
Pineault & Chastenay 1990, MNRAS, 246, 169. DRAO at 408 MHz (3'.4×5'.8: S=12.7±1.2 Jy) and 1.4 GHz (1'.0×1'.7: S=7.4±1.0 Jy). ADS
Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
Pineault et al. 1996, AJ, 112, 201. DRAO at 1.4 GHz (smoothed to 2') for HI. ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS
Mavromatakis 2003, A&A, 398, 153. Optical obserations. ADS

Last updated: 7 Jan 2004

G74.0-8.5 Cygnus Loop

Right Ascension: 20 51 00
Declination: +30 40
Size (/arcmin): 230×160
Type: S
Flux density at 1 GHz (/Jy): 210
Spectral Index: varies

Notes: Has been suggested that this is two overlapping remnants.

Radio: Shell, brightest to the NE, with fainter breakout region to S, with spectral variations.
Optical: Large filamentary loop, brightest to the NE, not well defined to the S or W.
X-ray: Shell in soft X-rays.
Point sources: Several compact radio sources within the boundary of the remnant, including CL4, plus X-ray sources in S.
Distance: Optical proper motion and shock velocity gives 0.44 kpc.

References:

Seaquist & Gilmore 1982, AJ, 87, 378. VLA observations of CL4. ADS
Green 1984, MNRAS, 211, 433. Most of remnant at 408 MHz (80"×160"). ADS
Braun & Strom 1986, A&A, 164, 208. IRAS observations. ADS
Straka et al. 1986, ApJ, 306, 266. Radio and optical comparison of NE. VLA at 1.6 GHz (4".7) plus optical. ADS
Raymond et al. 1988, ApJ, 324, 869. Detailed optical study of filaments. ADS
Green 1990, AJ, 100, 1927. DRAO at 408 MHz (3'.3×6'.7) for spectral index study, plus X-ray and optical. ADS
Graham et al. 1991, AJ, 101, 175. Shocked molecular H outside rim in NE. ADS
Shull & Clarke 1991, PASP, 103, 811. Optical spectroscopy of nearside filaments. ADS
Greidanus & Strom 1992, A&A, 257, 265. Optical kinematics. ADS
Shull & Hippelein 1992, ApJ, 383, 714. Optical kinematics and proper motion. ADS
Fesen et al. 1992, AJ, 104, 719. Halpha imagery. ADS
Cornett et al. 1992, ApJ, 395, L9. UV imagery. ADS
Long et al. 1992, ApJ, 400, 214. Optical of Balmer dominated filament. ADS
Arendt et al. 1992, ApJ, 400, 562. IRAS observations. ADS
Vancura et al. 1993, ApJ, 417, 663. Far UV observations. ADS
Hester et al. 1994, ApJ, 420, 721. Halpha, [OIII] and other optical observations of Balmer dominated filaments in NE. ADS
Miyata et al. 1994, PASJ, 46, L101. X-ray observations of NE. ADS
Graham et al. 1995, ApJ, 444, 787. X-ray and optical studies of interaction with surroundings. ADS
Sauvageot & Decourchelle 1995, A&A, 296, 201. [FeX] and [FeXIV] observations. ADS
Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
Levenson et al. 1996, ApJ, 468, 323. ROSAT and optical observations of W. ADS
Decourchelle et al. 1997, A&A, 326, 811. ROSAT observations of N. ADS
Levenson et al. 1997, ApJ, 484, 304. ROSAT observations. ADS
Leahy et al. 1997, AJ, 114, 2081. DRAO at 1.4 GHz (1'×2'), including polarisation. ADS
Miyata et al. 1998, PASJ, 50, 257. ASCA observations. ADS
Miyata et al. 1998, PASJ, 50, 475. ASCA observations of compact X-ray source in S. ADS
Leahy & Roger 1998, ApJ, 505, 784. DRAO at 1.4 GHz (1'.0×1'.9) and 408 MHz (3'.4×6'.9), for spectral index studies in comparison with other radio observations. ADS
Levenson et al. 1998, ApJS, 118, 541. Optical images. ADS
Roger et al. 1999, A&AS, 137, 7. 22 MHz flux density (S=1400±400 Jy). ADS
Bohigas et al. 1999, ApJ, 518, 324. Optical spectroscopy of surroundings. ADS
Levenson et al. 1999, ApJ, 526, 874. ROSAT images. ADS
Blair et al. 1999, AJ, 118, 942. HST observations, for distance. ADS
Aschenbach & Leahy 1999, A&A, 341, 602. ROSAT image, and comparison with radio. ADS
Sauvageot et al. 1999, A&A, 351, 669. [NeV] observations. ADS
Szentgyorgyi et al. 2000, ApJ, 529, 279. [NeV] images. ADS
Danforth et al. 2000, AJ, 119, 2319. UV, optical and X-ray comparison of selected regions. ADS
Sankrit et al. 2000, AJ, 120, 1925. HST far-UV spectra on non-radiative shock. ADS
Miyata et al. 2001, ApJ, 550, 1023. ASCA observations of compact X-ray sources. ADS
Miyata & Tsunemi 2001, ApJ, 552, 624. ASCA spectroscopy of regions in N and E. ADS
Ghavamian et al. 2001, ApJ, 547, 995. Optical spectroscopy. ADS
Danforth et al. 2001, AJ, 122, 938. Far-UV spectroscopy, Halpha and other optical observations of NE region. ADS
Levenson & Graham 2001, ApJ, 559, 948. HST of SE region. ADS
Uyaniker et al. 2002, A&A, 389, L61. Effelsberg 100-m at 2.7 GHz (4'.3) including polarisation, and comparison with ROSAT data. ADS
Leahy 2002, AJ, 123, 2689. DRAO at 1.4 GHz (4'×2') for HI. ADS
Patnaude et al. 2002, AJ, 124, 2118. Optical and ROSAT observations of region in SW. ADS
Blair et al. 2002, ApJS, 140, 367. UV spectroscopy. ADS
Welsh et al. 2002, A&A, 391, 705. Optical absorption to background stars. ADS
Sankrit & Blair 2002, ApJ, 565, 297. UV observations of NE filament. ADS
Levenson et al. 2002, ApJ, 576, 798. Chandra observations of W edge. ADS
Reich et al. 2003, A&A, 408, 961. Effelsberg 100-m at 863 MHz (14'.5: S=184±18 Jy). ADS

Last updated: 11 Jan 2004

G74.9+1.2 CTB 87

Right Ascension: 20 16 02
Declination: +37 12
Size (/arcmin): 8×6
Type: F
Flux density at 1 GHz (/Jy): 9
Spectral Index: varies

Radio: Filled-centre, with high polarization and high frequency turnover.
X-ray: Centrally brightened.
Distance: HI absorption indicates 12 kpc, optical extinction gives 6.1±0.9 kpc.
Point sources: Extragalactic compact source is nearby.

References:

Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_{430 MHz}=12.2±9.7 Jy, S_{318 MHz}=17.7±5.0 Jy. ADS
Weiler & Shaver 1978, A&A, 70, 389. WSRT at 610 MHz (57"×94": S=9.1±1.2 Jy), 1.4 (24"×40": S=8.7±1.2 Jy) and 5 GHz (24"×40": S=5.6±1.3 Jy). ADS
Geldzahler et al. 1980, A&A, 84, 237. Effelsberg 100-m at 2.7 GHz (4'.4: S=7.6±0.5 Jy). ADS
Wilson 1980, ApJ, 241, L19. Einstein observations. ADS
van Gorkom et al. 1982, MNRAS, 198, 757. WSRT HI absorption of nearby compact source. ADS
Seaquist & Gilmore 1982, AJ, 87, 378. VLA observations of nearby source. ADS
Morsi & Reich 1987, A&AS, 69, 533. Effelsberg 100-m at 32 GHz (smoothed to 40": S=1.47±0.19 Jy). ADS
Green & Gull 1989, MNRAS, 237, 555. VLA at 1.4 GHz (1'.2×1'.4) including HI. ADS
Salter et al. 1989, ApJ, 338, 171. NRAO 12-m at 84.2 GHz, plus review of flux densities. ADS
Pineault & Chastenay 1990, MNRAS, 246, 169. DRAO at 408 MHz (3'.4×5'.8: S=11.6±0.4 Jy) and 1.4 GHz (1'.0×1'.7: S=7.2±0.3 Jy). ADS
Asaoka & Koyama 1990, PASJ, 42, 625. Ginga X-ray spectrum. ADS
Wendker et al. 1991, A&A, 241, 551. DRAO at 408 MHz (3'.5×5'.2: S=13.3±0.8 Jy) and Effelsberg 100-m at 4.8 GHz (S=7.5±0.7 Jy). ADS
Wallace et al. 1994, A&A, 286, 565. HI of surroundings. ADS
Cho et al. 1994, AJ, 108, 634. CO of adjacent molecular clouds. ADS
Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
Wallace et al. 1997, A&A, 317, 212. DRAO at 408 MHz (3'.4×5'.5) and 1.4 GHz (1'.0×1'.6) including HI (smoothed to 2'). ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS
Kothes et al. 2003, ApJ, 588, 852. DRAO at 1.4 GHz (1'.6×1') including HI, plus CO observations. ADS

Last updated: 11 Jan 2004

G76.9+1.0

Right Ascension: 20 22 20
Declination: +38 43
Size (/arcmin): 12×9
Type: ?
Flux density at 1 GHz (/Jy): 2
Spectral Index: 0.6

Radio: Diffuse, non-thermal, with low frequency turnover.

References:

Landecker et al. 1993, A&A, 276, 522. VLA at 1.49 GHz (14"), 4.86 GHz (13"×16") and 8.55 GHz (11"×12"), including polarization and review of flux densities. ADS
Landecker et al. 1997, A&AS, 123, 199. Miyun at 232-MHz (3'.8×5'.4). ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS

Last updated: 13 Aug 1998

G78.2+2.1 DR4, gamma Cygni SNR

Right Ascension: 20 20 50
Declination: +40 26
Size (/arcmin): 60
Type: S
Flux density at 1 GHz (/Jy): 340
Spectral Index: 0.5

Notes: Has been called G78.1+1.8.

Radio: In complex region (early catalogues refer to other proposed remnants in this region).
Optical: Faint filaments, spectra indicate a SNR superposed on a HII region.
X-ray: Weak emission from the SE of the remnant.
Point sources: gamma-ray and X-ray point source in remnant.

References:

Higgs et al. 1977, AJ, 82, 718. DRAO at 1.4 GHz (2'×3': S=270±40 Jy) plus some 10 GHz (4') survey data, reveals true extent of remnant. ADS
d'Odorico & Sabbadin 1977, A&AS, 28, 439. Optical spectra. ADS
van den Bergh 1978, ApJS, 38, 119. Optical. ADS
Landecker et al. 1980, A&AS, 39, 133. DRAO HI observations (2'×3'.1). ADS
Higgs et al. 1983, AJ, 88, 97. CO of surroundings. ADS
Bohigas et al. 1983, RMxAA, 8, 155. Optical spectra, find thermal only. ADS
Braun & Strom 1986, A&AS, 63, 345. WSRT HI observations. ADS
Fukui & Tatematsu 1988, in SNRISM, p261. CO observations of the vicinity (2'.7). ADS
Green 1989, MNRAS, 238, 737. OH observations. ADS
Pineault & Chastenay 1990, MNRAS, 246, 169. DRAO at 408 MHz (3'.4×5'.8: S=480±60 Jy) and 1.4 GHz (1'.0×1'.7: S=270±40 Jy). ADS
Wendker et al. 1991, A&A, 241, 551. DRAO at 408 MHz (3'.5×5'.2: S=540±40 Jy) and Effelsberg 100-m at 4.8 GHz (S=150±15 Jy). ADS
Esposito et al. 1996, ApJ, 461, 820. Associated gamma-ray emission. ADS
Brazier et al. 1996, MNRAS, 281, 1033. gamma-ray and X-ray point source. ADS
Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
Zhang et al. 1997, A&A, 324, 641. Multi-frequency radio comparison. ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS
Roberts et al. 2001, ApJS, 133, 451. ASCA observations. ADS
Uchiyama et al. 2002, ApJ, 571, 866. ASCA observations. ADS
Mavromatakis 2003, A&A, 408, 237. Optical observations. ADS

Last updated: 7 Jan 2004

G82.2+5.3 W63

Right Ascension: 20 19 00
Declination: +45 30
Size (/arcmin): 95×65
Type: S
Flux density at 1 GHz (/Jy): 120?
Spectral Index: 0.5?

Notes: Has been called G82.5+5.3.

Radio: Shell in the Cygnus X complex.
Optical: In complex region, but spectra indicate SNR filaments.
X-ray: Detected.

References:

Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=59.0±3.5 Jy). ADS
Sabbadin 1976, A&A, 51, 159. Optical spectra. ADS
Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8). Incomplete mapping. ADS
Rosado & González 1981, RMxAA, 5, 93. Optical spectra. ADS
Seward 1990, ApJS, 73, 781. Einstein observations. ADS
Higgs et al. 1991, JRASC, 85, 24. DRAO at 408 MHz (3'.4×5'.0: S=165±21 Jy), plus review of flux densities. ADS
Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS
Reich et al. 2003, A&A, 408, 961. Effelsberg 100-m at 863 MHz (14'.5: S=82.5±5.5 Jy). ADS
Uyaniker et al. 2003, ApJ, 585, 785. DRAO at 1.4 GHz (1') including polarisation, of part. ADS

Last updated: 11 Jan 2004

G84.2-0.8

Right Ascension: 20 53 20
Declination: +43 27
Size (/arcmin): 20×16
Type: S
Flux density at 1 GHz (/Jy): 11
Spectral Index: 0.5

Radio: Elongated shell, with a filament aligned with the major axis.

References:

Matthews et al. 1977, A&A, 55, 1. WSRT at 610 MHz (56"×81": S=12.4±1.5 Jy) and Effelsberg 100-m at 2.7 GHz (4'.4: S=6.8±1.3 Jy). ADS
Matthews & Shaver 1980, A&A, 87, 255. WSRT at 1415 MHz (23"×32"), and Effelsberg 100-m at 2.7 GHz (4'.4: S=5.6±0.5 Jy). ADS
Feldt & Green 1993, A&A, 274, 421. DRAO at 1.4 GHz (1'×1'.5), including HI, plus CO observations. ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS
Uyaniker et al. 2003, ApJ, 585, 785. DRAO at 1.4 GHz (1') including polarisation. ADS

Last updated: 11 Jan 2004

G84.9+0.5

Right Ascension: 20 50 30
Declination: +44 53
Size (/arcmin): 6
Type: S
Flux density at 1 GHz (/Jy): 0.8
Spectral Index: 0.4

Radio: Incomplete shell.

References:

Taylor et al. 1992, AJ, 103, 931. WSRT at 327 MHz (1'.4×1'.0: S=1.2±0.1 Jy), and northern sky survey at 4.9 GHz (S=0.40±0.01 Jy). ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS

Last updated: 13 Aug 1998

G85.4+0.7

Right Ascension: 20 50 40
Declination: +45 22
Size (/arcmin): 24
Type: S
Flux density at 1 GHz (/Jy): ?
Spectral Index: 0.5?

Radio: Faint, incomplete shell, within larger thermal shell.
X-ray: Detected.

References:

Kothes et al. 2001, A&A, 376, 641. DRAO at 408 MHz (4'.4×2'.8: S<0.45 Jy) and 1.4 GHz (1'.1×0'.8), plus HI, X-ray and optical data. ADS

Last updated: 12 Oct 2001

G85.9-0.6

Right Ascension: 20 58 40
Declination: +44 53
Size (/arcmin): 24
Type: S
Flux density at 1 GHz (/Jy): ?
Spectral Index: 0.5?

Radio: Faint, incomplete shell.
X-ray: Detected.

References:

Kothes et al. 2001, A&A, 376, 641. DRAO at 408 MHz (4'.4×2'.8: S<0.9 Jy) and 1.4 GHz (1'.1×0'.8), plus HI, X-ray and optical data. ADS

Last updated: 12 Oct 2001

G89.0+4.7 HB21

Right Ascension: 20 45 00
Declination: +50 35
Size (/arcmin): 120×90
Type: S
Flux density at 1 GHz (/Jy): 220
Spectral Index: 0.40

Radio: Distorted shell (4C50.52, an extragalactic double, is within the boundary of the remnant).
Optical: Filaments possibly associated.
X-ray: Centrally brightened.
Distance: Various associations suggest 0.8 kpc.

References:

Hirabayashi & Takahashi 1972, PASJ, 24, 231. 30-m dish at 4.2 GHz (11': S=160±40 Jy). ADS
Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=148±16 Jy), plus optical filaments. ADS
Hill 1974, MNRAS, 169, 59. Half-Mile Telescope at 1.4 GHz (3'×3'.9). ADS
Haslam et al. 1975, A&A, 39, 453. Effelsberg 100-m at 2.7 GHz (4'.4) ADS
Fukui & Tatematsu 1988, in SNRISM, p261. CO observations of the vicinity (2'.7). ADS
Tatematsu et al. 1990, A&A, 237, 189. DRAO at 408 MHz (3'.5×4'.5) and 1.4 GHz (1'.0×1'.3), including HI, plus CO observations of adjacent molecular cloud. ADS
Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
Leahy & Aschenbach 1996, A&A, 315, 260. ROSAT observations. ADS
Lorimer et al. 1998, A&A, 331, 1002. Pulsar search. ADS
Koo et al. 2001, ApJ, 552, 175. NRAO 12-m and other CO observations (27" and 45") of eastern part. ADS
Reich et al. 2003, A&A, 408, 961. Effelsberg 100-m at 863 MHz (14'.5: S=228±5 Jy). ADS
Uyaniker et al. 2003, ApJ, 585, 785. DRAO at 1.4 GHz (1') including polarisation. ADS

Last updated: 11 Jan 2004

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Dave Green/MRAO, Cambridge, UK/D.A.Green@mrao.cam.ac.uk