G46.8−0.3     (HC30)

• Right Ascension: 19 18 10
• Declination: +12 09
• Size (/arcmin): 17×13
• Type: S
• Flux density at 1 GHz (/Jy): 17
• Spectral Index: 0.54

Notes: Has been called G46.6−0.2.

Radio: Shell, two bright arcs to NNW and SSE.

Distance: HI absorption suggests 6.8–8.8 kpc.

References:

• Willis 1973, A&A, 26, 237. NRAO 300-ft at 2.7 GHz (5': S=9.8±0.9 Jy), and 37-m at 1.7 GHz (S=14.5±5.5 Jy). ADS
• Caswell et al. 1975, AuJPA, 37, 39. Molonglo at 408 MHz (3': S=20.3 Jy) and Parkes 64-m at 5 GHz (4': S=7.1 Jy). ADS
• Dickel & DeNoyer 1975, AJ, 80, 437. Arecibo S_430 MHz=46±21 Jy. ADS
• Angerhofer et al. 1977, A&A, 55, 11. NRAO 140-ft at 5 GHz (6'.8: S=5.9±0.6 Jy). ADS
• Sato 1979, ApL, 20, 43. HI observations. ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Dubner et al. 1996, AJ, 111, 1304. VLA at 1.4 GHz (58''×53'': S=13.3±0.1 Jy). ADS
• Sun et al. 2011, A&A, 536, A83. Urumqi 25-m at 5 GHz (9'.5: S=7.02±0.18 Jy) including polarisation and review of flux densities. ADS

Last updated: 24 May 2014