Note: this is an
archived version which has been superseded. The current SNR
catalogue is at
http://www.mrao.cam.ac.uk/surveys/snrs/
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 S430 MHz=12.2±9.7 Jy, S318 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. 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 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
Dave Green/MRAO, Cambridge, UK/D.A.Green@mrao.cam.ac.uk