Note: this is an archived version which has been superseded.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 14 05
• Declination: +11 04
• 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), plus other flux densities. ADS

Last updated: 20th May 1992

G46.8-0.3 (HC30)

• Right Ascension: 19 15 50
• Declination: +12 04
• 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), and VRO 37-m at 1.7 GHz (S=14.5±5.5).
• Caswell et al. 1975, AuJPA, 37, 39. Molonglo at 408 MHz (3': S=20.3) and Parkes 64-m at 5 GHz (4': S=7.1). ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S(430)=46±21. ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=5.9±0.6). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Sato 1979, ApL, 20, 43. HI absorption. ADS
• Dubner et al. 1996, AJ, 111, 1304. VLA at 1.4 GHz (58"×53": S=13.3±0.1). ADS

Last updated: 20 AUG 1996

G49.2-0.7 (W51)

• Right Ascension: 19 21 30
• Declination: +14 00
• 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.

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, 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. IPC 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

Last updated: 20 AUG 1996

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

• Right Ascension: 19 36 30
• Declination: +17 08
• Size (arcmin): 28×33
• 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.

References:

• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=5.3±0.6).
• 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).
• Clark et al. 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=11.7). ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S(430)=20±10, S(318)=20±3.6. ADS
• Goss et al. 1975, A&A, 43, 459. WSRT at 610 MHz (1'×3': S=13.2±1.6). 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. IPC 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

Last updated: 30 JUN 1995

G54.1+0.3

• Right Ascension: 19 28 28
• Declination: +18 46
• Size (arcmin): 1.5
• Type: F?
• Flux density at 1 GHz (Jy): 0.5
• Spectral Index: 0.1

Radio: Filled-centre.

X-ray: Detected.

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) ADS
• Velusamy & Becker 1988, AJ, 95, 1162. VLA at 1.4 (14": S=0.48±0.03), 1.6 (14": S=0.42±0.03) and 5 GHz (5": S=0.33±0.02), OSRT at 327 MHz (S=0.50±0.08), plus review of flux densities. ADS
• Seward 1989, AJ, 97, 481. IPC observations ADS

Last updated: 13th June 1990

G54.4-0.3 (HC40)

• Right Ascension: 19 31 10
• Declination: +18 50
• 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).
• 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). ADS
• Velusamy et al. 1986, JA&A, 7, 105. WSRT at 609 MHz (50"×191" smoothed to 100"×200"). ADS
• Junkes et al. 1992, A&AS, 91, 1. Surrounding CO. ADS
• Junkes et al. 1992, A&A, 261, 289. Nearby IRAS sources. ADS

Last updated: 23 FEB 1993

G55.7+3.4

• Right Ascension: 19 19 10
• Declination: +21 38
• 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) and 1415 MHz (27"×72": S=1.0±0.1). ADS

Last updated: 05 APR 1993

G57.2+0.8 (4C21.53)

• Right Ascension: 19 32 50
• Declination: +21 50
• 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 40 25
• Declination: +23 28
• Size (arcmin): 5
• Type: S
• Flux density at 1 GHz (Jy): 3?
• Spectral Index: ?

Radio: Incomplete shell.

References:

• Taylor et al. 1992, AJ, 103, 931. WSRT at 327 MHz (2'.5×1'.0: S=5.1±0.2), and northern sky survey at 4.9 GHz. ADS

Last updated: 19th May 1992

G59.8+1.2

• Right Ascension: 19 36 50
• Declination: +24 12
• 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

G65.1+0.6

• Right Ascension: 19 52 30
• Declination: +28 25
• Size (arcmin): 90×50
• Type: S
• Flux density at 1 GHz (Jy): 6
• Spectral Index: 0.6

Radio: Large, faint shell.

References:

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

Last updated: 14th January 1991

G65.3+5.7

• Right Ascension: 19 31 00
• Declination: +31 05
• 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), estimate S(408)=91±5 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. IPC observations. ADS

Last updated: 10 MAY 1993

G65.7+1.2 DA 495

• Right Ascension: 19 50 10
• Declination: +29 18
• 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), and VRO 37-m at 1.7 GHz (S=4.4±0.5), plus review of flux densities.
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S(430)=8.7±4.9, S(318)=9.7±2.2. ADS
• Landecker & Caswell 1983, AJ, 88, 1810. DRAO at 1.4 GHz (0'.9×1'.5: S=4.4±0.2). ADS
• Velusamy et al. 1989, JA&A, 10, 161. OSRT at 327 MHz (36"×64"), WSRT at 610 MHz (62") and VLA at 1.4 GHz (36" and 12"), including IRAS imaging. ADS

Last updated: 13th June 1990

G67.7+1.8

• Right Ascension: 19 52 34
• Declination: +31 21
• Size (arcmin): 9
• Type: S
• Flux density at 1 GHz (Jy): 1.4
• Spectral Index: 0.3

Radio: Double arc shell.

References:

• Taylor et al. 1992, AJ, 103, 931. WSRT at 327 MHz (1'.9×1'.0: S=1.9±0.1), and northern sky survey at 4.9 GHz (S=0.42±0.05). ADS

Last updated: 19th May 1992

G68.6-1.2

• Right Ascension: 20 06 40
• Declination: +30 28
• 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

Last updated: 28 JUN 1995

G69.0+2.7 CTB 80

• Right Ascension: 19 51 30
• Declination: +32 45
• 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, JA&A, 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. IPC 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), Effelsberg 100-m at 1.41 (9': S=62±9), 1.72 (7'.6: S=66±5), 2.7 (4'.5: S=52±4) and 4.75 GHz (2'.4: S=44±3.3), plus review of flux densities. ADS
• Kulkarni et al. 1988, Nat, 331, 50. Pulsar detection. ADS
• Angelini et al. 1988, ApJ, 330, L43. EXOSAT spectra. ADS
• Fesen et al. 1988, Nat, 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

Last updated: 30 JUN 1995

G69.7+1.0

• Right Ascension: 20 00 45
• Declination: +32 35
• 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

Last updated: 28 JUN 1995

G73.9+0.9

• Right Ascension: 20 12 20
• Declination: +36 03
• Size (arcmin): 22?
• Type: S?
• Flux density at 1 GHz (Jy): 9?
• Spectral Index: 0.3?

Radio: Incomplete, clumpy shell.

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), 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) and 1.4 GHz (1'.0×1'.7: S=7.4±1.0). ADS
• Lozinskaya et al. 1993, AZh, 70, 469. (See also AR, 37, 240.) Optical observations. ADS

Last updated: 26 AUG 1996

G74.0-8.5 Cygnus Loop

• Right Ascension: 20 49 00
• Declination: +30 30
• 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.

References:

• Keen et al. 1973, A&A, 28, 197. Effelsberg 100-m at 2.7 GHz (4'.8), NE at 10.7 GHz (1'.25).
• Dickel & Willis 1980, A&A, 85, 55. WSRT at 610 MHz (56"×107") of NE area (NGC6992) only. ADS
• Seaquist & Gilmore 1982, AJ, 87, 378. VLA observations of CL4. ADS
• Fesen et al. 1982, ApJ, 262, 171. Optical spectroscopy. ADS
• Hester et al. 1983, ApJ, 273, 219. Optical imagery. ADS
• Ku et al. 1984, ApJ, 278, 615. IPC and HRI X-ray observations. ADS
• Green 1984, MNRAS, 211, 433. Most of remnant at 408 MHz (80"×160") with OMT. ADS
• Charles et al. 1985, ApJ, 295, 456. IPC 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

Last updated: 31 JUL 1995

G74.9+1.2 CTB 87

• Right Ascension: 20 14 10
• Declination: +37 03
• 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)=12.2±9.7, S(318)=17.7±5.0. ADS
• Weiler & Shaver 1978, A&A, 70, 389. WSRT at 610 MHz (57"×94": S=9.1±1.2), 1.4 (24"×40": S=8.7±1.2) and 5 GHz (24"×40": S=5.6±1.3). ADS
• Geldzahler et al. 1980, A&A, 84, 237. Effelsberg 100-m at 2.7 GHz (4'.4: S=7.6±0.5). ADS
• Wilson 1980, ApJ, 241, L19. IPC 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). 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) and 1.4 GHz (1'.0×1'.7: S=7.2±0.3). 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) and Effelsberg 100-m at 4.8 GHz (S=7.5±0.7). 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

Last updated: 01 JUL 1995

G76.9+1.0

• Right Ascension: 20 20 30
• Declination: +38 33
• Size (arcmin): 9×12
• Type: ?
• Flux density at 1 GHz (Jy): 2?
• Spectral Index: 0.6?

Radio: Diffuse, non-thermal.

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

Last updated: 30 JUN 1995

G78.2+2.1 DR4, gamma Cygni

• Right Ascension: 20 19 00
• Declination: +40 15
• 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.

References:

• Higgs et al. 1977, AJ, 82, 718. DRAO at 1.4 GHz (2'×3': S=270±40) 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, in IAU101, p281. IPC observations.
• 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) and 1.4 GHz (1'.0×1'.7: S=270±40). ADS
• Wendker et al. 1991, A&A, 241, 551. DRAO at 408 MHz (3'.5×5'.2: S=540±40) and Effelsberg 100-m at 4.8 GHz (S=150±15). ADS
• Esposito et al. 1996, ApJ, 461, 820. Associated gamma-ray emission. ADS

Last updated: 20 AUG 1996

G82.2+5.3 W63

• Right Ascension: 20 17 30
• Declination: +45 20
• 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).
• 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. IPC observations. ADS
• Higgs et al. 1991, JRASC, 85, 24. DRAO at 408 MHz (3'.4×5'.0: S=165±21), plus review of flux densities. ADS

Last updated: 23 FEB 1993

G84.2-0.8

• Right Ascension: 20 51 30
• Declination: +43 16
• 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) and Effelsberg 100-m at 2.7 GHz (4'.4: S=6.8±1.3). 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). ADS
• Feldt & Green 1993, A&A, 274, 421. DRAO at 1.4 GHz (1'×1'.5), including HI, plus CO observations. ADS

Last updated: 01 JUL 1995

G84.9+0.5

• Right Ascension: 20 48 45
• Declination: +44 42
• 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), and northern sky survey at 4.9 GHz (S=0.40±0.01). ADS

Last updated: 19th May 1992

G89.0+4.7 HB21

• Right Ascension: 20 43 30
• Declination: +50 25
• 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: Detected from incomplete mapping.

References:

• Hirabayashi & Takahashi 1972, PASJ, 24, 231. 30-m dish at 4.2 GHz (11': S=160±40).
• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=148±16), plus optical filaments.
• Hill 1974, MNRAS, 169, 59. HMT 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
• Reich et al. 1983, in IAU101, p377. Effelsberg 100-m at 4.75 GHz (2'.5).
• Leahy 1987, MNRAS, 228, 907. IPC observations. 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

Last updated: 19th May 1992