Note: this is an archived version which has been superseded.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

• 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