G6.4−0.1 ADS: search fulltext or title/keyword/abstract

W28

• Right Ascension: 18 00 30
• Declination: −23 26
• Size (/arcmin): 48
• Type: C
• Flux density at 1 GHz (/Jy): 310
• Spectral Index: varies

Notes: Has been called G6.6−0.2.

Radio: Several non-thermal sources in a ring, with flat spectrum core.

Optical: Diffuse emission.

X-ray: Diffuse emission from most of the remnant.

Point sources: Young pulsar near edge of remnant, but not thought to be related.

Distance: HI observations suggest 1.9 kpc, optical extinction suggests 3.6 kpc.

References:

• Kundu & Velusamy 1972, A&A, 20, 237. NRAO 140-ft at 10 GHz (3'). ADS
• van den Bergh et al. 1973, ApJS, 26, 19. Optical observations. ADS
• 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
• Altenhoff et al. 1979, A&AS, 35, 23. Effelsberg 100-m at 4.9 GHz (2.'6). ADS
• Lozinskaya 1981, SvAL, 7, 17. Mean optical velocity. ADS
• Andrews et al. 1983, ApJ, 266, 684. VLA at 1.4 GHz (8'') 4.9 GHz (3'') and 15 GHz (1'') of central region only, plus Einstein image of central region. ADS
• Bohigas et al. 1983, RMxAA, 8, 155. Optical spectra. ADS
• Andrews et al. 1985, AJ, 90, 310. VLA of central component. ADS
• Long et al. 1991, ApJ, 373, 567. Einstein and optical observations. ADS
• Kassim 1992, AJ, 103, 943. VLA at 327 MHz (3.'1×4.'4: S=660 Jy). ADS
• Kaspi et al. 1993, ApJ, 409, L57. Pulsar association. ADS
• Frail et al. 1993, Nature, 365, 136. VLA at 327 MHz (smoothed to 65''), plus pulsar association. ADS
• Frail et al. 1994, ApJ, 424, L111. VLA of associated OH masers. ADS
• Frail et al. 1996, AJ, 111, 1651. OH maser emission. ADS
• Biggs & Lyne 1996, MNRAS, 282, 691. Pulsar search. ADS
• Claussen et al. 1997, ApJ, 489, 143. VLA of OH masers. ADS
• Claussen et al. 1999, ApJ, 522, 349. High resolution observations of OH masers. ADS
• Yusef-Zadeh et al. 2000, ApJ, 540, 842. VLA at 327 MHz (2.'6×5.'5) and 1.48 GHz (40''×65''). ADS
• Dubner et al. 2000, AJ, 120, 1933. VLA at 328 MHz (52''×97'': S=425±40 Jy) and 1415 MHz (48''×88'': S=246±20 Jy), and comparison with other observations. ADS
• Reach & Rho 2000, ApJ, 544, 843. ISO observations of interactions with surroundings. ADS
  also see: Reach & Rho 2001, ApJ, 558, 943. Erratum. ADS
• Douvion et al. 2001, A&A, 373, 281. ISO observations. ADS
• Roberts et al. 2001, ApJS, 133, 451. ASCA observations. ADS
• Velázquez et al. 2002, AJ, 124, 2145. Parkes 64-m at 1.4 GHz (15') for HI. ADS
• Rho & Borkowski 2002, ApJ, 575, 201. ROSAT and ASCA observations. ADS
• Claussen et al. 2002, ApJ, 580, 909. Observations of nearby source. ADS
• Yusef-Zadeh et al. 2003, ApJ, 583, 267. OH observations. ADS
• Caswell 2004, MNRAS, 349, 99. ATCA at 1.7 GHz of associated OH masers. ADS
• Mavromatakis et al. 2004, A&A, 426, 567. Optical observations. ADS
• Reach et al. 2005, ApJ, 618, 297. Molecular lines and near IR observations. ADS
• Hoffman et al. 2005, ApJ, 620, 257. OH maser observations. ADS
• Kawasaki et al. 2005, ApJ, 631, 935. ASCA observations. ADS
• Neufeld et al. 2007, ApJ, 664, 890. Spitzer observations. ADS
• Aharonian et al. 2008, A&A, 481, 401. H.E.S.S. observations. ADS
• Casandjian & Grenier 2008, A&A, 489, 849. γ-ray observations. ADS
• Hewitt et al. 2008, ApJ, 683, 189. GBT at 1.6 and 1.7 GHz for OH masers. ADS
• Giuliani et al. 2010, A&A, 516, L11. γ-ray observations. ADS
• Marquez-Lugo & Phillips 2010, MNRAS, 407, 94. Mid-IR observations. ADS
• Abdo et al. 2010, ApJ, 718, 348. Fermi observations. ADS
• Yuan & Neufeld 2011, ApJ, 726, 76. Spitzer observations. ADS
• Sawada & Koyama 2012, PASJ, 64, 81. Suzaku observations. ADS
• Nichols et al. 2012, MNRAS, 419, 251. CO observations of selected regions. ADS
• Gusdorf et al. 2012, A&A, 542, L19. CO observations of regions in NE. ADS
• Vaupreé et al. 2014, A&A, 568, A50. CO, HCO⁺ and DCO⁺ molecular line observations. ADS
• Pihlström et al. 2014, AJ, 147, 73. VLA observations of methanol masers. ADS
• Neufeld et al. 2014, ApJ, 781, 102. Herschel and Spitzer IR spectroscopy. ADS
• Hanabata et al. 2014, ApJ, 786, 145. Fermi observations of region. ADS
• Zhou et al. 2014, ApJ, 791, 87. XMM-Newton observations. ADS
• Gusdorf et al. 2014, IAUS, 296, 178. CO observations. ADS
• Nakamura et al. 2014, PASJ, 66, 62. XMM-Newton observations of NE. ADS
• Froebrich et al. 2015, MNRAS, 454, 2586. H₂ IR observations. ADS
• Maxted et al. 2016, MNRAS, 462, 532. NH₃ observations of region. ADS
• Acero et al. 2016, ApJS, 224, 8. Fermi observations. ADS
• Pannuti et al. 2017, ApJ, 839, 59. Optical and X-ray observations. ADS
• H.E.S.S. Collaboration: Abdalla et al. 2018, A&A, 612, A1. H.E.S.S. observations. ADS
• Okon et al. 2018, PASJ, 70, 35. Suzaku observations. ADS
• Nobukawa et al. 2018, ApJ, 854, 87. Suzaku observations. ADS
• Cui et al. 2018, ApJ, 860, 69. Fermi observations. ADS
• Ruiz-Lapuente et al. 2018, ApJ, 862, 124. HST search for progenitor companion. ADS
• Ogbodo et al. 2020, MNRAS, 493, 199. OH maser observations. ADS
• Chawner et al. 2020, MNRAS, 493, 2706. Herschel observations. ADS
• Qiao et al. 2020, ApJS, 247, 5. ATCA of OH masers. 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'') including polarisation, and Spitzer observations. ADS
• Millard et al. 2021, ApJS, 257, 36. ISO far-IR spectroscopy. ADS

Last updated: 20 Dec 2022

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