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Cobb, BE, Bloom, JS, Perley, DA, Morgan, AN, Cenko, SB and Filippenko, AV (2010) Discovery of sn 2009nz associated with grb 091127. The Astrophysical Journal Letters, 718 (2). L150-L155. ISSN 2041-8205
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Abstract
We report SMARTS, Gemini, and Swift-UVOT observations of the optical transient (OT) associated with gamma-ray burst (GRB) 091127, at redshift 0.49, taken between 0.9 hr and 102 days following the Swift trigger. In our early-time observations, the OT fades in a manner consistent with previously observed GRB afterglows. However, after nine days post-burst, the OT is observed to brighten for a period of ∼two weeks, after which the source resumes fading. A comparison of this late-time "bump" to SN 1998bw (the broad-lined Type Ic supernova associated with GRB 980425), and several other GRB supernovae (SNe), indicates that the most straightforward explanation is that GRB 091127 was accompanied by a contemporaneous SN (SN 2009nz) that peaked at a magnitude of MV = -19.0 ± 0.2. SN 2009nz is globally similar to other GRB SNe, but evolves slightly faster than SN 1998bw and reaches a slightly dimmer peak magnitude.We also analyze the early-time UV-optical-IR spectral energy distribution of the afterglow of GRB 091127 and find that there is little to no reddening in the host galaxy along the line of sight to this burst. © 2010 The American Astronomical Society.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 0201 Astronomical And Space Sciences |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Astrophysics Research Institute |
| Publisher: | American Astronomical Society |
| Date Deposited: | 23 May 2017 09:54 |
| Last Modified: | 20 Apr 2022 09:37 |
| DOI or ID number: | 10.1088/2041-8205/718/2/L150 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/6496 |
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