G23.3−0.3 ADS: search title/keyword/abstract or fulltext

W41 ADS: search title/keyword/abstract or fulltext

• 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 suggest 4.2 or 4.8 kpc, optical extinction suggests 3.4 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. H.E.S.S. detection. ADS
• Reach et al. 2006, AJ, 131, 1479. Spitzer possible detection. ADS
• Aharonian et al. 2006, ApJ, 636, 777. H.E.S.S. 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-Newton observations. ADS
• Leahy & Tian 2008, AJ, 135, 167. VGPS at 1.4 GHz (1′) including HI, plus CO observations. ADS
• Mukherjee et al. 2009, ApJ, 691, 1707. XMM-Newton and SWIFT observations. ADS
• Frail et al. 2013, ApJ, 773, L19. OH observations. ADS
• Castro et al. 2013, ApJ, 774, 36. Fermi observations. ADS
• H.E.S.S. Collaboration: Abramowski et al. 2015, A&A, 574, A27. H.E.S.S. observations. ADS
• Su et al. 2015, ApJ, 811, 134. CO observations of region. ADS
• Acero et al. 2016, ApJS, 224, 8. Fermi observations. ADS
• Ranasinghe & Leahy 2018, AJ, 155, 204. VGPS HI absorption observations. ADS
• Lee et al. 2019, AJ, 157, 123. [FeII] IR observations. ADS
• Wang et al. 2020, A&A, 639, A72. Optical extinction for distance. ADS
• Dokara et al. 2021, A&A, 651, A86. VLA at 4 to 8 GHz (18″: S=1.8 Jy) including polarisation, and Spitzer observations. ADS
• Castelletti et al. 2021, A&A, 653, A62.VLA 74-MHz survey flux density, and other low-frequency radio flux densities. ADS
• Sofue et al. 2021, ApJS, 253, 17. Nobeyama 45-m CO observations (20″) of region. ADS

Last updated: 20 Dec 2022

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