Note: this is an archived version which has been superseded.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

G78.2+2.1 DR4, gamma Cygni SNR

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

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