Lost and Found: Another Missed Type IIn SN, CG X-2

Details Lost and Found: Another Missed Type IIn SN, CG X-2 Lost and Found: Another Missed Type IIn SN, CG X-2

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20920006b&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #200.06; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

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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