Note: this is an archived version which has been superseded.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

G27.4+0.0 4C-04.71

• Right Ascension: 18 38 40
• Declination: -04 59
• Size (arcmin): 4
• Type: S
• Flux density at 1 GHz (Jy): 6
• Spectral Index: 0.68

Notes: Early references refer to G27.3-0.1, a supposed larger remnant.

Radio: Incomplete shell.

X-ray: Diffuse emission, with central compact component.

Point sources: Compact X-ray source.

Distance: HI absorption indicates 6 to 7.5 kpc.

References:

• Velusamy & Kundu 1974, A&A, 32, 375. NRAO 300-ft at 2.7 GHz (5').
• Dickel & Milne 1976, AuJPh, 29, 435. Comparison of earlier Parkes 64-m maps at 2.7 GHz (8'.4) and 5 GHz (4'.4). ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=2.0±0.5). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Clark et al. 1975, AuJPA, 37, 75. Molonglo at 408 MHz (3': S=4.4). ADS
• Caswell et al. 1982, MNRAS, 200, 1143. FIRST at 1415 MHz (60"×45": S=3.5). Revise S(408)=10.4, and S(5000)=1.9±0.2. ADS
• Kriss et al. 1985, ApJ, 288, 703. IPC and HRI observations, plus VLA at 1.4 and 5 GHz (12"). ADS
• Sanbonmatsu & Helfand 1992, AJ, 104, 2189. VLA at 1.4 GHz for HI absorption. ADS
• Helfand et al. 1994, ApJ, 434, 627. ROSAT observations, particularly of central source. ADS

Last updated: 27 JUN 1995