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Title:
Lost and Found: Another Missed Type IIn SN, CG X-2
Authors:
Bauer, Franz E.; Smartt, S.; Brandt, W. N.; Immler, S.
Affiliation:
AA(Columbia Univ), AB(Queen's University Belfast, Ireland), AC(Pennsylvania State University), AD(GSFC)
Publication:
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #200.06; Bulletin of the American Astronomical Society, Vol. 38, p.1179
Publication Date:
12/2006
Origin:
AAS
Abstract Copyright:
(c) 2006: American Astronomical Society
Bibliographic Code:
2006AAS...20920006B

Abstract

Circinus Galaxy (CG) X-2 is an ultraluminous X-ray source discovered by Chandra in 1999/2000 which exhibits many traits of a young, rapidly-evolving supernova (SN): >40x increase in X-ray flux between 1997-2000, a kT 10 keV thermal spectrum with emission line components, and spatial coincidence with a strong, variable Halphaand radio-emitting point source. We have recently confirmed it as late-time type IIn SN with the VLT. Only a few dozen young SNe have been been studied at X-ray wavelengths at all, and only a two of these are brighter at X-ray wavelengths than CG X-2. We will present a best guess timeline for CG X-2 and outline what the wealth of optical/X-ray/radio archival observations can tell us about this rather enigmatic source.
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