The X-Ray Transient 080109 in NGC 2770: an X-Ray Flash Associated with a Normal Core-Collapse Supernova
| dc.creator | Li, Li-Xin | |
| dc.date | 2008-03-01 | |
| dc.date | 2008-05-14 | |
| dc.date.accessioned | 2026-07-07T09:51:38Z | |
| dc.date.available | 2026-07-07T09:51:38Z | |
| dc.description | Although it is generally thought that long-duration gamma-ray bursts (LGRBs) are associated with core-collapse supernovae (SNe), so far only four pairs of GRBs and SNe with firmly established connection have been found. All the four GRB-SNe are among a special class of Type Ic--called the broad-lined SNe indicative of a large explosion energy, suggesting that only a small fraction of SNe Ibc have GRBs associated with them. This scheme has been refreshed by the discovery of a bright X-ray transient in NGC 2770 on 9 January 2008, which was followed by a rather normal Type Ib SN 2008D. In this paper, I argue that the transient 080109 is an X-ray flash (XRF, the soft version of a GRB) because of the following evidences: (1) The transient cannot be interpreted as a SN shock breakout event; (2) The GRB X-ray flare interpretation is not supported by the high-energy observation. Then I show that XRF 080109 satisfies the well-known relation between the isotropic-equivalent energy and the peak spectral energy for LGRBs, which highly strengthens the XRF interpretation. Finally, I point out that, the peak spectral energy of XRF 080109 and the maximum bolometric luminosity of SN 2008D agree with the $E_{γ,\p}$--$L_{{\rm SN},\max}$ relationship of Li (2006), strengthening the validity of the relationship. I speculate that events like XRF 080109 may occur at a rate comparable to SNe Ibc, and a soft X-ray telescope devoted to surveying for nearby X-ray flares will be very fruitful in discovering them. | |
| dc.description | 8 pages, 6 figures. Final version for publication in MNRAS | |
| dc.identifier | https://arxiv.org/abs/0803.0079 | |
| dc.identifier | http://arxiv.org/abs/0803.0079 | |
| dc.identifier | Mon. Not. Roy. Astron. Soc. 388 (2008) 603-610 | |
| dc.identifier | doi:10.1111/j.1365-2966.2008.13461.x | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/165316 | |
| dc.subject | Astrophysics | |
| dc.title | The X-Ray Transient 080109 in NGC 2770: an X-Ray Flash Associated with a Normal Core-Collapse Supernova | |
| dc.type | text |