Note: this is an archived version which has been superseded.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

2nd quadrant Galactic SNRs

G93.3+6.9 DA 530, 4C(T)55.38.1

• Right Ascension: 20 51 00
• Declination: +55 10
• Size (arcmin): 27×20
• Type: S
• Flux density at 1 GHz (Jy): 9
• Spectral Index: 0.54

Notes: Has been called G93.2+6.7.

Radio: Shell, with two bright limbs, highly polarized.

References:

• Roger & Costain 1976, A&A, 51, 151. DRAO at 1.42 GHz (2'×2'.4: S=6.9). ADS
• Haslam et al. 1980, A&A, 92, 57. Effelsberg 100-m at 1.72 GHz (7'.6: S=6.47±0.52) and 2.7 GHz (4'.4: S=5.64±0.64), plus review of flux densities. ADS
• Lalitha et al. 1984, A&A, 131, 196. Effelsberg 100-m at 4.75 GHz (smoothed to 3': S=4.01±0.57). ADS

Last updated: 28th February 1988

G93.7-0.2 CTB 104A, DA 551

• Right Ascension: 21 27 45
• Declination: +50 35
• Size (arcmin): 80
• Type: S
• Flux density at 1 GHz (Jy): 65
• Spectral Index: 0.3

Notes: Has been called G93.6-0.2 and G93.7-0.3.

Radio: Faint shell with possible a steep spectrum core.

References:

• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=18.4±1.0).
• Mantovani et al. 1982, A&A, 105, 176. Effelsberg 100-m at 1.7 GHz (7'.6: S=53.5±5.0), plus review of flux densities. ADS
• Landecker et al. 1985, AJ, 90, 1082. DRAO at 1.4 GHz (smoothed to 2': S=58±6). ADS
• Mantovani et al. 1991, A&A, 247, 545. Effelsberg 100-m at 4.75 GHz (smoothed to 3': S=33.5±4.0), including polarization, plus review of flux densities. ADS

Last updated: 20th May 1992

G94.0+1.0 3C434.1

• Right Ascension: 21 23 10
• Declination: +51 40
• Size (arcmin): 30×25
• Type: S
• Flux density at 1 GHz (Jy): 15
• Spectral Index: 0.44

Radio: Incomplete shell, in complex region.

References:

• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=6.1±0.8), and VRO 37-m at 1.7 GHz (S=11±3).
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=5.8±0.4). Also NRAO 140-ft at 5 GHz (6').
• Mantovani et al. 1982, A&A, 105, 176. Effelsberg 100-m at 1.7 GHz (7'.6: S=12.0±1.3), plus review of flux densities. ADS
• Goss et al. 1984, A&A, 138, 469. WSRT at 610 MHz (smoothed to 100": S=16±1.7) and Effelsberg 100-m at 4.75 GHz (2'.4: S=7.2±0.5). ADS
• Landecker et al. 1985, AJ, 90, 1082. DRAO at 1.4 GHz (smoothed to 2': S=16±3). ADS

Last updated: 28th February 1988

G109.1-1.0 CTB 109

• Right Ascension: 22 59 30
• Declination: +58 37
• Size (arcmin): 28
• Type: S
• Flux density at 1 GHz (Jy): 20
• Spectral Index: 0.50

Radio: Semicircular shell, with the Molecular cloud S152 is to the immediate W.

X-ray: Incomplete shell.

Point sources: Pulsar at W edge.

References:

• Hughes et al. 1981, ApJ, 246, L127. WSRT at 610 MHz (1': S=40±5) shows bad CLEAN artefacts. ADS
• Blair & Kirshner 1981, Nat, 291, 132. Optical spectra. ADS
• Downes 1983, MNRAS, 203, 695. Effelsberg 100-m at 2.7 GHz (4'.4: S=13.0±1.5). ADS
• Gregory et al. 1983, in IAU101, p429. VLA at 1.4 GHz (1'), NRAO 300-ft at 5 GHz (3') and IPC observations.
• Sofue et al. 1983, PASJ, 35, 447. NRO 45-m at 10.2 GHz (2'.7). ADS
• Hughes et al. 1984, ApJ, 283, 147. WSRT at 610 MHz (20": S=26±3) 1.4 GHz (10"), DRAO at 1.4 GHz (1'×1'.2: S=16.8±2) and Algonquin 46-m at 6.5 GHz (4'.5: S=6.7±1). ADS
• Braun & Strom 1986, A&AS, 63, 345. WSRT HI observations. ADS
• Tatematsu et al. 1987, PASJ, 39, 755. NRO 45-m at 10 GHz (2'.7), plus polarization. ADS
• Tatematsu et al. 1987, A&A, 184, 279. CO observations of the surroundings (2'.7). ADS
• Hanson et al. 1988, A&A, 195, 114. EXOSAT of pulsar. ADS
• Morini et al. 1988, ApJ, 333, 777. EXOSAT observations. ADS
• Koyama et al. 1989, PASJ, 41, 461. X-ray observations of pulsar. ADS
• Coe et al. 1989, MNRAS, 238, 649. IRAS observations of surroundings. ADS
• Green 1989, MNRAS, 238, 737. OH observations. ADS
• Tatematsu et al. 1990, ApJ, 351, 157. CO of surroundings, plus X-ray observations. ADS
• Davies & Coe 1991, MNRAS, 249, 313. Optical and IR observations near pulsar. ADS
• Hurford & Fesen 1995, MNRAS, 277, 549. ROSAT imaging. ADS

Last updated: 20 AUG 1996

G111.7-2.1 Cassiopeia A, 3C461

• Right Ascension: 23 21 10
• Declination: +58 32
• Size (arcmin): 5
• Type: S
• Flux density at 1 GHz (Jy): 2720
• Spectral Index: 0.77

Notes: Presumably the remnant of a late 17th century SN.

Radio: Bright shell with compact knots and extended plateau of emission.

Optical: Fast knots and quasi-stationary flocculli, with many filaments at large radii.

X-ray: Incomplete shell.

Distance: Optical expansion, plus proper motions indicate 2.8 kpc.

References:

• Bell et al. 1975, Nat, 257, 463. 5km at 5 GHz (2"×2".3). ADS
• Green et al. 1975, A&A, 44, 187. Effelsberg 100-m at 15.0 GHz (58": S=419.1±1.7). ADS
• Fabian et al. 1980, MNRAS, 193, 175. HRI observations. ADS
• Dickel et al. 1982, ApJ, 257, 145. Comparison of X-ray, Radio and HRI. ADS
• Kamper & van den Bergh 1983, in IAU101, p55. Optical expansion.
• Markert et al. 1983, ApJ, 268, 778. X-ray asymmetry. ADS
• Tuffs 1986, MNRAS, 219, 13. Proper motions from 5km maps at 5 GHz (2"×2".3) between 1974 and 1978. ADS
• Mezger et al. 1986, A&A, 167, 145. 247-GHz map (70"). ADS
• Tsunemi et al. 1986, ApJ, 306, 248. X-ray spectrum. ADS
• Fesen et al. 1987, ApJ, 313, 378. Optical, of fast moving flocculli. ADS
• Fesen et al. 1988, ApJ, 329, L89. Optical, flocculli, and ``flare". ADS
• Jansen et al. 1988, ApJ, 331, 949. EXOSAT observations. ADS
• Woan & Duffett-Smith 1990, MNRAS, 243, 87. Structure at 81.5 MHz. ADS
• Fesen 1990, AJ, 99, 1904. [NeIII] optical imagery. ADS
• Rees 1990, MNRAS, 243, 637. Flux density decrease at 38 MHz. ADS
• Greidanus & Strom 1991, A&A, 249, 521. 20micron observations of part of shell. ADS
• Anderson et al. 1991, ApJ, 373, 146. VLA at 1.4 and 5 GHz (1".3) for spectral variations. ADS
• Hook et al. 1992, A&A, 255, 285. Flux density decrease at 81.5 MHz. ADS
• Wilson et al. 1993, A&A, 280, 221. Molecular emission towards remnant. ADS
• Holt et al. 1994, PASJ, 46, L151. X-ray spectral mapping. ADS
• Woan & Duffett-Smith 1993, MNRAS, 260, 693. Deep pulsar search. ADS
• Guame et al. 1994, ApJ, 425, 127. NH3 absorption and CO observations. ADS
• Iyudin et al. 1994, A&A, 284, L1. Gamma ray line observations. ADS
• Reed et al. 1995, ApJ, 440, 706. Optical spectra, for 3-d structure. ADS
• Anderson et al. 1995, ApJ, 441, 300. VLA at 1.4 GHz and 4.8 GHz (both 1".3), for polarization studies. ADS
• Anderson & Rudnick 1995, ApJ, 441, 307. VLA at 1.4 GHz and 4.8 GHz, for proper motion studies. ADS
• The et al. 1995, ApJ, 444, 244. Gamma ray observations. ADS
• Predehl & Schmitt 1995, A&A, 293, 889. ROSAT of dust scattered halo. ADS
• Liszt & Lucas 1995, A&A, 294, 811. NRAO 12-m observations of molecular emission and absorption. ADS
• Lawrence et al. 1995, AJ, 109, 2635. Optical imaging spectroscopy. ADS
• Kassim et al. 1995, ApJ, 455, L59. VLA at 74 (25") and 332 MHz (6"), including spectral index comparisons. ADS
• Anderson & Rudnick 1996, ApJ, 456, 234. VLA for spectral index comparisons. ADS
• Agafanov 1996, A&A, 306, 578. Flux density decrease at 102 MHz. ADS

Last updated: 20 AUG 1996

G112.0+1.2

• Right Ascension: 23 13 40
• Declination: +61 30
• Size (arcmin): 30?
• Type: S?
• Flux density at 1 GHz (Jy): 7?
• Spectral Index: 0.6?

Radio: Non-thermal source hinted by Bologna survey.

References:

• Bonsignori-Facondi & Tomasi 1979, A&A, 77, 93. Bologna at 408 MHz (4'.2×110': S=11±30%). ADS

Last updated: 28th February 1988

G114.3+0.3

• Right Ascension: 23 34 45
• Declination: +61 38
• Size (arcmin): 90×55
• Type: S
• Flux density at 1 GHz (Jy): 6?
• Spectral Index: 0.3?

Radio: Shell, with HII region S165 within the boundary of the remnant.

Distance: Possible association with HI features suggests 3.0--3.8 kpc.

Point sources: Pulsar near centre of remnant.

References:

• Reich & Braunsfurth 1981, A&A, 99, 17. Effelsberg 100-m at 2.7 GHz (4'.4: S=3.6) and S(1.4)=4.4 from 1.4 GHz survey data, plus HI from Maryland-Green Bank survey. ADS
• Kulkarni et al. 1993, Nat, 362, 135. Pulsar association. ADS
• Fürst et al. 1993, A&A, 276, 470. Pulsar association. ADS
• Becker et al. 1996, A&A, 306, 464. ROSAT of pulsar. ADS

Last updated: 28 JUN 1995

G116.5+1.1

• Right Ascension: 23 51 20
• Declination: +62 58
• Size (arcmin): 80×60
• Type: S
• Flux density at 1 GHz (Jy): 11?
• Spectral Index: 0.8?

Radio: Distinct shell, with high polarization.

Distance: Possible association with HI features suggests 3.6--5.2 kpc.

References:

• Reich & Braunsfurth 1981, A&A, 99, 17. Effelsberg 100-m at 2.7 GHz (4'.4: S=4.7±0.4) and S(1.4)=8.0±0.8 from 1.4 GHz survey data, plus HI from Maryland-Green Bank survey. ADS

Last updated: 1st March 1988

G116.9+0.2 CTB 1

• Right Ascension: 23 56 40
• Declination: +62 10
• Size (arcmin): 34
• Type: S
• Flux density at 1 GHz (Jy): 9?
• Spectral Index: 0.5?

Notes: Has been called G117.3+0.1 and G116.9+0.1.

Radio: Incomplete shell.

Optical: Filaments on sky survey.

Point sources: Pulsar nearby.

Distance: Possible association with HI features suggests 2.8--4.0 kpc, mean optical velocity suggests 2.7 kpc.

References:

• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=3.9±1.0), and VRO 37-m at 1.7 GHz (S=5.5±2.0), plus review of flux densities.
• van den Bergh et al. 1973, ApJS, 26, 19. Optical.
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=4.2±0.2).
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=3.0±0.3). ADS
• Dickel & Willis 1980, A&A, 85, 55. WSRT at 610 MHz (56"×64") and 1.4 GHz (22"×25"). ADS
• Reich & Braunsfurth 1981, A&A, 99, 17. Effelsberg 100-m at 2.7 GHz (4'.4: S=4.8±0.4) and S(1.4)=7.8±0.8 from 1.4 GHz survey data, plus HI from Maryland-Green Bank survey. ADS
• Lozinskaya 1981, SvAL, 7, 17. Mean optical velocity. ADS
• Landecker et al. 1982, AJ, 87, 1379. DRAO at 1.42 GHz and HI (2'×2'.3: S=8.3±0.5), plus review of flux densities. ADS
• Fesen et al. 1985, ApJ, 292, 29. Optical spectra. ADS
• Hailey & Craig 1994, ApJ, 434, 635. Optical spectroscopy. ADS
• Hailey & Craig 1995, ApJ, 455, L151. ROSAT of nearby pulsar. ADS

Last updated: 20 AUG 1996

G117.4+5.0

• Right Ascension: 23 52 30
• Declination: +67 30
• Size (arcmin): 60×80?
• Type: S?
• Flux density at 1 GHz (Jy): 30?
• Spectral Index: 0.5?

Radio: Non-thermal source hinted by Bologna survey.

References:

• Bonsignori-Facondi & Tomasi 1979, A&A, 77, 93. Bologna at 408 MHz (4'.2×110': S=45±30%). ADS

Last updated: 28th February 1988

G119.5+10.2 CTA 1

• Right Ascension: 00 04 00
• Declination: +72 30
• Size (arcmin): 90?
• Type: S
• Flux density at 1 GHz (Jy): 36
• Spectral Index: 0.3

Radio: Incomplete shell, poorly defined in north.

Optical: Faint diffuse nebulosities.

X-ray: Centrally brightend.

References:

• Sieber et al. 1979, A&A, 74, 361. Effelsberg 100-m at 2.7 GHz (4'.4: S=23.6±2.8). ADS
• Sieber et al. 1981, A&A, 103, 393. Effelsberg 100-m at 2.7 GHz and 1.7 GHz (7'.6: S=31.6±2.5), and 6C at 151 MHz (4': S=62.6±6). ADS
• Fesen et al. 1981, ApJ, 247, 148. Optical, including spectra. ADS
• Fesen et al. 1983, ApJS, 51, 337. Deep [OIII] imagery. ADS
• Seward 1990, ApJS, 73, 781. IPC observations. ADS
• Simonetti 1992, ApJ, 386, 170. VLA observations of background sources for rotation measure studies. ADS
• Pineault et al. 1993, AJ, 105, 1060. DRAO at 1.4 GHz (1': S=34±4), plus HI and IRAS. ADS
• Seward et al. 1995, ApJ, 453, 284. ROSAT observations. ADS

Last updated: 20 AUG 1996

G120.1+1.4 Tycho, 3C10, SN1572

• Right Ascension: 00 22 30
• Declination: +63 52
• Size (arcmin): 8
• Type: S
• Flux density at 1 GHz (Jy): 56
• Spectral Index: 0.61

Notes: This is the remnant of the Tycho's SN of AD1572.

Radio: Shell, brightest to the NE.

Optical: Faint filaments/knots to the NNW, NE and E.

X-ray: Shell, coincident with the radio shell, brighter to the NE.

Point sources: Faint radio source near centre of the remnant, thought to be extragalactic.

Distance: HI absorption gives 4--5 kpc, optical proper motion and modelled shock velocity gives 2.3 kpc.

References:

• Duin & Strom 1975, A&A, 39, 33. WSRT at 610 MHz (57"×64") and 5 GHz (7"×8"). ADS
• Klein et al. 1979, A&A, 76, 120. Effelsberg 100-m at 10.7 GHz (1'.2: S=13.1±0.8), plus review of flux densities. ADS
• Strom et al. 1982, MNRAS, 200, 473. WSRT at 1415 MHz (27"×31") from 1971 and 1979, for expansion. ADS
• Dickel et al. 1982, ApJ, 257, 145. Comparison of Radio, X-ray and Optical. ADS
• Reid et al. 1982, ApJ, 261, 485. IPC observations. ADS
• Seward et al. 1983, ApJ, 266, 287. HRI observations. ADS
• Tan & Gull 1985, MNRAS, 216, 949. 5km at 2.7 GHz (4") from 1980 and 1983, and OMT at 1.4 GHz (23") from 1965 and 1980, for expansion. ADS
• Albinson et al. 1986, MNRAS, 219, 427. HI observations. ADS
• Green & Gull 1987, MNRAS, 224, 1055. VLA HI absorption observations towards central radio source. ADS
• Smith et al. 1988, ApJ, 325, 288. EXOSAT spectrum and image (smoothed to 13"). ADS
• Dickel et al. 1991, AJ, 101, 2151. VLA at 1.4 and 5 GHz (1".5). ADS
• Wood et al. 1992, AJ, 103, 1338. VLA at 5 GHz (1".5) polarization studies. ADS
• Fink et al. 1994, A&A, 283, 635. X-ray spectra. ADS
• Vancura et al. 1995, ApJ, 441, 680. X-ray spectra and ROSAT image. ADS
• Predehl & Schmitt 1995, A&A, 293, 889. ROSAT of dust scattered halo. ADS
• Schwarz et al. 1995, A&A, 299, 193. WSRT and Effelsberg 100-m at 1.4 GHz (50"), and VLA at 1.4 GHz (13"), for neutral hydrogen studies. ADS

Last updated: 20 AUG 1996

G126.2+1.6

• Right Ascension: 01 18 30
• Declination: +64 00
• Size (arcmin): 70
• Type: S?
• Flux density at 1 GHz (Jy): 7
• Spectral Index: varies

Radio: Poorly defined shell.

Optical: Filaments detected.

References:

• Reich et al. 1979, A&A, 78, L13. Effelsberg 100-m at 1.4 GHz (9': S=6.8±0.7) and 2.7 GHz (4'.4: S=3.9±0.4). ADS
• Blair et al. 1980, ApJ, 242, 592. Optical detection and spectra. ADS
• Rosado 1982, RMxAA, 5, 127. Optical spectra. ADS
• Fesen et al. 1983, ApJS, 51, 337. Deep [OIII] imagery. ADS
• Fürst et al. 1984, A&A, 133, 11. Effelsberg 100-m at 2.7 GHz (4'.4) and 4.8 GHz (2'.6). ADS
• Joncas et al. 1989, A&A, 219, 303. DRAO at 408 MHz (3'.5×3'.9: S=12±2.5) and part at 1.4 GHz (1'.1×1'.0), plus review of flux densities. ADS
• Xilouris et al. 1993, A&A, 270, 393. Optical imaging. ADS

Last updated: 28 JUN 1995

G127.1+0.5 R5

• Right Ascension: 01 25 00
• Declination: +62 55
• Size (arcmin): 45
• Type: S
• Flux density at 1 GHz (Jy): 13
• Spectral Index: 0.6

Notes: Has been called G127.3+0.7.

Radio: Distinct shell, with bright central source.

Point sources: Flat radio spectrum (extragalactic) source at centre of remnant.

Optical: Detected.

Distance: 1.2--1.3 kpc if associated with NGC559.

References:

• Caswell 1977, MNRAS, 181, 789. HMT at 1.42 GHz (3'.5×3'.9), plus other observations of central source. ADS
• Salter et al. 1978, A&A, 66, 77. Effelsberg 100-m at 2.7 GHz (4'.4), plus 5 and 8.7 GHz of the central source. ADS
• Pauls 1977, A&A, 59, L13. Effelsberg 100-m at 1.4 GHz (9': S=8±1). ADS
• Reich et al. 1979, A&A, 78, L13. Effelsberg 100-m at 1.4 GHz (9': S=10.8±1.3). ADS
• Pauls et al. 1982, A&A, 112, 120. WSRT at 610 MHz (56"×62") and HI absorption to the point source with the VLA. ADS
• Geldzahler & Shaffer 1982, ApJ, 260, L69. Observations of central source. ADS
• Fürst et al. 1984, A&A, 133, 11. Effelsberg 100-m at 2.7 GHz (4'.4) and 4.8 GHz (2'.6). ADS
• Goss & van Gorkom 1984, JA&A, 5, 425. WSRT HI absorption of central source. ADS
• Joncas et al. 1989, A&A, 219, 303. DRAO at 408 MHz (3'.5×3'.9: S=17.9±2.0) and 1.4 GHz (1'.13×1'.0: S=10.1±0.8), plus review of flux densities. ADS
• Xilouris et al. 1993, A&A, 270, 393. Optical imaging. ADS

Last updated: 28 JUN 1995

G130.7+3.1 3C58, SN1181

• Right Ascension: 02 01 55
• Declination: +64 35
• Size (arcmin): 9×5
• Type: F
• Flux density at 1 GHz (Jy): 33
• Spectral Index: 0.10

Notes: This is the remnant of the SN of AD1181.

Radio: Filled-centre, highly polarized, with high frequency turnover.

Optical: Faint filaments.

X-ray: Centrally brightened with power-law spectrum.

Point sources: Compact source in X-rays.

Distance: HI absorption indicates 3.2 kpc.

References:

• Green et al. 1975, A&A, 44, 187. Effelsberg 100-m at 15.0 GHz (58": S=26.7±0.5). ADS
• Wilson & Weiler 1976, A&A, 49, 357. WSRT at 610 MHz (58"×64"), 1.4 GHz (24"×27") and 5 GHz (7"×8"). ADS
• van den Bergh 1978, ApJ, 220, L9. Optical observations. ADS
• Becker et al. 1982, ApJ, 255, 557. X-ray observations. ADS
• Green & Gull 1982, Nat, 299, 606. HI absorption distance. ADS
• Fesen 1983, ApJ, 270, L53. Optical spectra. ADS
• Reynolds & Aller 1985, AJ, 90, 2312. VLA at 1.4 GHz (2'), for limits of shell. ADS
• Davelaar et al. 1986, ApJ, 300, L59. EXOSAT spectrum. ADS
• Green 1986, MNRAS, 218, 533. CLFST at 151 MHz (1'.2×1'.3: S=36±4), 5km at 2.7 GHz (4"), plus IPC observations for limit on shell. ADS
• Green 1987, MNRAS, 225, 11P. Flux density increase at 408 MHz. ADS
• Morsi & Reich 1987, A&AS, 69, 533. Effelsberg 100-m at 32 GHz (26".5: S=24.2±1.4). ADS
• Reynolds & Aller 1988, ApJ, 327, 845. VLA at 1.4 (2".4) and 4.9 GHz (2".5). ADS
• Salter et al. 1989, ApJ, 338, 171. NRAO 12-m at 84.2 GHz (90": S=15.0±2.0), plus review of flux densities. ADS
• Asaoka & Koyama 1990, PASJ, 42, 625. Ginga X-ray spectrum. ADS
• Green & Scheuer 1992, MNRAS, 258, 833. IRAS upper limits. ADS
• Roberts et al. 1993, A&A, 274, 427. HI absorption. ADS
• Wallace et al. 1994, A&A, 286, 565. HI of surroundings. ADS
• Helfand et al. 1995, ApJ, 453, 741. ROSAT observations. ADS

Last updated: 20 AUG 1996

G132.7+1.3 HB3

• Right Ascension: 02 14 00
• Declination: +62 30
• Size (arcmin): 80
• Type: S
• Flux density at 1 GHz (Jy): 45
• Spectral Index: 0.6

Notes: Has been called G132.4+2.2.

Radio: Faint shell, adjacent to W3/4/5 complex.

Optical: Complete, filamentary shell, shock excited spectra.

X-ray: Partial shell.

Distance: Interaction with surroundings suggests 2.2 kpc.

References:

• van den Bergh et al. 1973, ApJS, 26, 19. Optical.
• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5': S=33.8±7.0).
• d'Odorico & Sabbadin 1977, A&AS, 28, 439. Optical spectra. ADS
• Read 1981, MNRAS, 194, 863. 6C at 151 MHz (4'.4) and HMT at 1.4 GHz (2') showing HI shell. ADS
• Lozinskaya 1981, SvAL, 7, 17. Mean optical velocity. ADS
• Fesen & Gull 1983, PASP, 95, 196. Optical image. ADS
• Leahy et al. 1985, ApJ, 294, 183. IPC observations. ADS
• Landecker et al. 1987, AJ, 94, 111. DRAO at 408 MHz (3'.5×4': S=75±15), plus review of flux densities. ADS
• Routledge et al. 1991, A&A, 247, 529. DRAO at 1.4 GHz (1'.0×1'.1) for HI, plus CO observations. ADS
• Fesen et al. 1995, AJ, 110, 2876. Optical imaging and spectroscopy, DRAO at 408 MHz (3'.5×4') and 1.4 GHz (1'.0×1'.1). ADS

Last updated: 22 AUG 1996

G152.2-1.2

• Right Ascension: 04 05 30
• Declination: +48 24
• Size (arcmin): 110?
• Type: S?
• Flux density at 1 GHz (Jy): 16?
• Spectral Index: 0.7?

Radio: Non-thermal source hinted by Bologna survey.

References:

• Bonsignori-Facondi & Tomasi 1979, A&A, 77, 93. Bologna at 408 MHz (4'.2×110': S=30±30%). ADS

Last updated: 28th February 1988

G156.2+5.7

• Right Ascension: 04 54 40
• Declination: +51 47
• Size (arcmin): 110
• Type: S
• Flux density at 1 GHz (Jy): 5
• Spectral Index: 0.5

Radio: Faint shell.

X-ray: Faint shell.

References:

• Pfeffermann et al. 1991, A&A, 246, L28. ROSAT detection. ADS
• Reich et al. 1992, A&A, 256, 214. Effelsberg 100-m at 1.4 (9': S=4.2±1.0) and 2.7 GHz (4'.3: S=3.0±1.0), plus HI and IRAS. ADS
• Yamauchi et al. 1993, PASJ, 45, 795. Hard X-ray observations. ADS

Last updated: 28 JUN 1995

G160.9+2.6 HB9

• Right Ascension: 04 57 00
• Declination: +46 36
• Size (arcmin): 140×120
• Type: S
• Flux density at 1 GHz (Jy): 110
• Spectral Index: 0.6

Notes: Has been called G160.5+2.8 and G160.4+2.8.

Radio: Large, filamentary shell.

Optical: Incomplete shell.

X-ray: Centrally brightened.

Point sources: Pulsar within boundary of the remnant, plus several nearby compact radio sources.

Distance: Various observations suggests less than 4 kpc.

References:

• d'Odorico & Sabbadin 1977, A&AS, 28, 439. Optical spectra. ADS
• Damashek et al. 1978, ApJ, 225, L31. Pulsar. ADS
• Lozinskaya 1981, SvAL, 7, 17. Mean optical velocity. ADS
• Dwarakanath et al. 1982, JA&A, 3, 207. Radio observations at 34.5 MHz (26'×40': S=750±150), plus review of flux densities. ADS
• van Gorkom et al. 1982, MNRAS, 198, 757. WSRT HI absorption to nearby point source. ADS
• Seaquist & Gilmore 1982, AJ, 87, 378. VLA observations of nearby source. ADS
• Reich et al. 1983, in IAU101, p377. Effelsberg 100-m at 2.7 GHz (4'.5).
• Krymkin et al. 1988, SvA, 32, 634. Observations at 12.6 and 25 MHz, plus review of flux densities. ADS
• Leahy 1988, ApJ, 322, 917. IPC observations. ADS
• Leahy & Roger, 1991, AJ, 101, 1033. DRAO at 408 MHz (3'.5×4'.8) and 1.4 GHz (1'.0×1'.4), including HI and discussion of distance. ADS
• Yamauchi & Koyama 1993, PASJ, 45, 545. Hard X-ray observations. ADS
• Leahy & Aschenbach 1995, A&A, 293, 853. ROSAT observations. ADS

Last updated: 30 JUN 1995

G166.0+4.3 VRO 42.05.01

• Right Ascension: 05 23 00
• Declination: +42 52
• Size (arcmin): 55×35
• Type: S
• Flux density at 1 GHz (Jy): 7?
• Spectral Index: 0.4?

Radio: Two arcs of strikingly different radii.

Optical: Nearly complete ring.

X-ray: Predominantly in SW.

Distance: HI indicates 4.5 kpc.

References:

• van den Bergh et al. 1973, ApJS, 26, 19. Optical.
• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=5.2±1.0).
• Lozinskaya 1979, AuJPh, 32, 113. Halpha interferometry. ADS
• Landecker et al. 1982, ApJ, 261, L41. DRAO at 1.4 GHz (1'.0×1'.4), plus review of flux densities. ADS
• Fesen et al. 1983, ApJS, 51, 337. Deep [OIII] imagery. ADS
• Pineault et al. 1985, A&A, 151, 52. VLA at 1.4 GHz (16"×20") of part of remnant, and optical. ADS
• Pineault et al. 1987, ApJ, 315, 580. DRAO and VLA combined at 1.4 GHz (20"). ADS
• Fesen et al. 1985, ApJ, 292, 29. Optical spectra. ADS
• Braun & Strom 1986, A&AS, 63, 345. WSRT HI Observations. ADS
• Landecker et al. 1989, MNRAS, 237, 277. DRAO at 1.4 GHz (1'.0×1'.4), including HI. ADS
• Burrows & Guo 1994, ApJ, 421, L19. ROSAT images and spectra. ADS

Last updated: 28 JUN 1995

G166.2+2.5 OA 184

• Right Ascension: 05 15 30
• Declination: +41 50
• Size (arcmin): 90×70
• Type: S
• Flux density at 1 GHz (Jy): 11
• Spectral Index: 0.5

Radio: Large, faint shell.

Optical: Nearly complete ring.

Distance: HI indicates 8±2 kpc.

References:

• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=6.0±2.2).
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo 111 MHz. ADS
• Lozinskaya 1981, SvAL, 7, 17. Mean optical velocity. ADS
• Fesen et al. 1985, ApJ, 292, 29. Optical spectra. ADS
• Routledge et al. 1986, MNRAS, 221, 809. DRAO at 1.4 GHz (1'×1'.4: S=9.0±0.5) including HI, plus review of flux densities. ADS
• Kim et al. 1988, AJ, 96, 704. VLA of background sources for magnetic field structure of the remnant. ADS
• Leahy & Marshall 1988, MNRAS, 235, 805. IRAS observations. ADS

Last updated: 20 AUG 1996

G179.0+2.6

• Right Ascension: 05 50 30
• Declination: +31 05
• Size (arcmin): 70
• Type: S?
• Flux density at 1 GHz (Jy): 7
• Spectral Index: 0.4

Radio: Thick shell, with background extragalactic sources near centre.

References:

• Fürst & Reich 1986, A&A, 154, 303. Effelsberg 100-m at 1.4 (9'.4), 2.7 (4'.3) and 4.75 GHz (2'.4). ADS
• Fürst et al. 1989, A&A, 223, 66. Observations of central, extragalactic source. ADS

Last updated: 18th January 1988