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W49B

• Right Ascension: 19 11 08
• Declination: +09 06
• Size (/arcmin): 4×3
• Type: S
• Flux density at 1 GHz (/Jy): 38
• Spectral Index: 0.46

Radio: Shell, brightest to the SE and W, near the HII region W49A.

X-ray: Centrally brightened, elongated E–W.

Point sources: Compact X-ray source.

Distance: HI absorption suggests 11.3 kpc, H₂ emission suggests 7.5 kpc.

References:

• Shaver & Goss 1970, AuJPA, 14, 133. Molonglo at 408 MHz (3') and Parkes 64-m at 2.7 GHz (4'). ADS
• Downes & Wilson 1974, A&A, 34, 133. Effelsberg 100-m at 10.7 GHz (1.'3). ADS
• Green et al. 1975, A&A, 44, 187. Effelsberg 100-m at 15.0 GHz (58'': S=9.0±0.7 Jy). ADS
• Lockhart & Goss 1978, A&A, 67, 355. HI absorption. ADS
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2.'6). ADS
• Pye et al. 1984, MNRAS, 207, 649. Einstein observations, and VLA at 1.4 and 5 GHz (both 12''). ADS
• Smith et al. 1985, ApJ, 296, 469. EXOSAT spectrum. ADS
• Morsi & Reich 1987, A&AS, 71, 189. Effelsberg 100-m at 32 GHz (smoothed to 30'': S=6.90±0.38 Jy). ADS
• Moffett & Reynolds 1994, ApJ, 437, 705. VLA at 330 MHz (6.''7×7.''7: S=64.4 Jy), 1.48 GHz (4.''8×5.''2: S=31.8 Jy) and 4.85 GHz (4.''0×4.''1), including polarisation. ADS
• Fujimoto et al. 1995, PASJ, 47, L31. ASCA observations. ADS
• Gorham et al. 1996, ApJ, 458, 257. Pulsar search. ADS
• Green et al. 1997, AJ, 114, 2058. Parkes 64-m OH observations. ADS
• Hwang et al. 2000, ApJ, 532, 970. ROSAT image and ASCA spectroscopy. ADS
• Sugizaki et al. 2001, ApJS, 134, 77. ASCA survey observations. ADS
• Aharonian et al. 2001, A&A, 375, 1008. H.E.S.S. limit. ADS
• Brogan & Troland 2001, ApJ, 550, 799. VLA at 1.4 GHz (24''×27'' and 5'') for HI Zeeman splitting. ADS
• Lacey et al. 2001, ApJ, 559, 954. VLA at 74 MHz (23''×26'': S=55.6 Jy) and 326 MHz (6.''2×6.''6: S=56.0 Jy). ADS
• Kaplan et al. 2002, ApJ, 566, 378. VLA at 333 MHz (50''), and other observations of the region. ADS
• Kawasaki et al. 2005, ApJ, 631, 935. ASCA observations. ADS
• Reach et al. 2006, AJ, 131, 1479. Spitzer observations. ADS
• Miceli et al. 2006, A&A, 453, 567. XMM-Newton observations. ADS
• Keohane et al. 2007, ApJ, 654, 938. IR and Chandra observations. ADS
• Ozawa et al. 2009, ApJ, 706, L71. Suzaku observations. ADS
• Abdo et al. 2010, ApJ, 722, 1303. Fermi observations. ADS
• Sun et al. 2011, A&A, 536, A83. Urumqi 25-m at 5 GHz (9.'5: S=19.1±1.0 Jy) including polarisation and review of flux densities. ADS
• Rodes-Roca 2013, A&A, 555, A115. IR of compact X-ray source. ADS
• Yang et al. 2013, ApJ, 766, 44. Suzaku spectroscopy. ADS
• Lopez et al. 2013, ApJ, 777, 145. Chandra spectroscopy. ADS
• Zhu et al. 2014, ApJ, 793, 95. Spitzer and other observations. ADS
• Froebrich et al. 2015, MNRAS, 454, 2586. H₂ IR observations. ADS
• Acero et al. 2016, ApJS, 224, 8. Fermi observations. ADS
• Kilpatrick et al. 2016, ApJ, 816, 1. CO observations, including broad lines. ADS
• Koo et al. 2016, ApJ, 821, 20. Spitzer and Herschel flux densities (and comparison with X-ray properties). ADS
• H.E.S.S. Collaboration: Abdalla et al. 2018, A&A, 612, A1. H.E.S.S. observations. ADS
• Ranasinghe & Leahy 2018, AJ, 155, 204. VGPS HI absorption observations. ADS
• H.E.S.S. Collaboration: Abdalla et al. 2018, A&A, 612, A5. H.E.S.S. observations. ADS
• Zhou & Vink 2018, A&A, 615, A150. Chandra observations. ADS
• Tanaka et al. 2018, ApJ, 866, L26. NuSTAR observations. ADS
• Yamaguchi et al. 2018, ApJ, 868, L35. NuSTAR observations. ADS
• Lee et al. 2019, AJ, 157, 123. [FeII] and H₂ IR observations. ADS
• Chawner et al. 2020, MNRAS, 493, 2706. Herschel observations. ADS
• Lee et al. 2020, AJ, 160, 263. H₂ IR observations. ADS
• Sun & Chen 2020, ApJ, 893, 90. XMM-Newton observations. ADS
• Holland-Ashford et al. 2020, ApJ, 903, 108. XMM-Newton observations. ADS
• Dokara et al. 2021, A&A, 651, A86. VLA at 4 to 8 GHz (18'': S=3.3 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
• Sano et al. 2021, ApJ, 919, 123. ALMA CO observations. 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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