G23.3−0.3     W41

• Right Ascension: 18 34 45
• Declination: −08 48
• Size (/arcmin): 27
• Type: S
• Flux density at 1 GHz (/Jy): 70
• Spectral Index: 0.5

Radio: Distorted ring, in complex region, overlapping G22.7−0.2.

X-ray: Possible extended emission, with compact sources.

Point sources: Pulsar association suggested.

Distance: HI and CO observations indicate 4.2 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 5 GHz (4'). ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2'.6). ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3'.3×3'.4: S=138 Jy). ADS
• Gaensler & Johnston 1995, MNRAS, 275, L73. Possible pulsar association. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Aharonian et al. 2005, Science, 307, 1938. γ-ray detection. ADS
• Reach et al. 2006, AJ, 131, 1479. Spitzer possible detection. ADS
• Aharonian et al. 2006, ApJ, 636, 777. γ-ray observations. ADS
• Albert et al. 2006, ApJ, 643, L53. γ-ray observations. ADS
• Landi et al. 2006, ApJ, 651, 190. X-ray observations. ADS
• Tian et al. 2007, ApJ, 657, L25. VGPS at 1.4 GHz (1') including HI, plus XMM observations. ADS
• Leahy & Tian 2008, AJ, 135, 167. VGPS at 1.4 GHz (1') including HI, plus CO observations. ADS

Last updated: 16 Mar 2009