Note: this is an archived version which has been superseded.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).
• 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').
• Sato 1973, PASJ, 25, 135. HI absorption.
• 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.
• 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
• Mavromatakis et al. 2001, A&A, 370, 265. Optical observations. ADS
• Brogan et al. 2000, ApJ, 537, 875. VLA at 1.7 GHz for OH Zeeman splitting. ADS

Last updated: 17 Oct 2001

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).
• 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).
• 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 extension to NE.

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

Last updated: 12 Oct 2001

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).
• 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.
• 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: Strong in Halpha+[NII] and [OIII].

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

Last updated: 13 Aug 1998

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.
• 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.
• 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

Last updated: 17 Oct 2001

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.
• 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: Weak 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).
• 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
• Lozinskaya et al. 1993, ARep, 37, 240. Optical observations. 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

Last updated: 13 Aug 1998

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

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
• Charles et al. 1985, ApJ, 295, 456. Einstein observations. 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
• Ballet et al. 1989, A&A, 211, 217. [FeX] and [FeXIV] spectroscopy. ADS
• Ballet & Rothenflug 1989, A&A, 218, 277. EXOSAT observations. 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
• Blair et al. 1991, ApJ, 374, 202. Far UV mapping. ADS
• Blair et al. 1991, ApJ, 379, L33. UV spectroscopy. 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

Last updated: 17 Oct 2001

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.

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

Last updated: 13 Aug 1998

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).
• 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
• Lozinskaya et al. 2000, AstL, 26, 77. Halpha and X-ray observations. ADS
• Roberts et al. 2001, ApJS, 133, 451. ASCA observations. ADS

Last updated: 8 Nov 2001

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?

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).
• 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

Last updated: 13 Aug 1998

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

Last updated: 13 Aug 1998

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).
• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=148±16 Jy), plus optical filaments.
• Hill 1974, MNRAS, 169, 59. Half-Mile Telescope at 1.4 GHz (3'×3'.9).
• 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).
• 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

Last updated: 12 Oct 2001