dc.contributor.author |
Drake, A. J.,.. et al. (including Roy, R. & Kumar, B.) |
|
dc.date.accessioned |
2011-07-05T06:39:55Z |
|
dc.date.available |
2011-07-05T06:39:55Z |
|
dc.date.issued |
2011-07-10 |
|
dc.identifier.uri |
http://hdl.handle.net/123456789/818 |
|
dc.description.abstract |
We report on the discovery and observations of the extremely luminous optical transient
CSS100217:102913+404220 (CSS100217 hereafter). Spectroscopic observations showed this transient was coincident with a galaxy at redshift z = 0.147, and reached an apparent magnitude of V ∼ 16.3. After correcting for foreground Galactic extinction we determine the absolute magnitude to be MV = −22.7 approximately 45 days after maximum light. Based on our unfiltered optical photometry the peak optical emission was L = 1.3 × 10⁴⁵erg s−¹, and over a period of 287 rest-frame days had an integrated bolometric luminosity of 1.2 × 10⁵² erg. Analysis of the pre-outburst SDSS spectrum of the source shows features consistent with a Narrow- line Seyfert1 (NLS1) galaxy. High-resolution HST and Keck followup observations show the event
occurred within 150pc of nucleus of the galaxy, suggesting a possible link to the active nuclear region. However, the rapid outburst along with photometric and spectroscopic evolution are much more consistent with a luminous supernova. Line diagnostics suggest that the host galaxy is undergoing significant star formation. We use extensive follow-up of the event along with archival CSS and SDSS data to investigate the three most likely sources of such an event; 1) an extremely luminous supernova; 2) the tidal disruption of a star by the massive nuclear black hole; 3) variability of the central AGN. We find that CSS100217 was likely an extremely luminous type IIn supernova that occurred within range of the narrow-line region of an AGN. We discuss how similar events may have been missed in past supernova surveys because of confusion with AGN activity. |
en_US |
dc.language.iso |
en_US |
en_US |
dc.relation.ispartofseries |
apj735-106 |
|
dc.subject |
Supernovae: Active — galaxies, Stellar content — galaxies, Nuclei — galaxies: |
en_US |
dc.title |
The discovery and nature of optical transient css100217:102913+404220 |
en_US |
dc.type |
Article |
en_US |