GRB 060218/SN 2006aj: A Gamma-Ray Burst and Prompt Supernova atz= 0.0335 | Zendy

N. Mirabal | Zendy; J. P. Halpern | Zendy; Deokkeun An | Zendy; J. R. Thorstensen | Zendy; D. M. Terndrup | Zendy

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GRB 060218/SN 2006aj: A Gamma-Ray Burst and Prompt Supernova atz= 0.0335

Author(s) -

N. Mirabal,

J. P. Halpern,

Deokkeun An,

J. R. Thorstensen,

D. M. Terndrup

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/505177

Subject(s) - gamma ray burst , physics , supernova , astrophysics , photometry (optics) , metallicity , galaxy , stars , astronomy , spectroscopy

We report the imaging and spectroscopic localization of GRB 060218 to alow-metallicity dwarf starburst galaxy at z = 0.03345 +/- 0.00006. In additionto making it the second nearest gamma-ray burst known, optical spectroscopyreveals the earliest detection of weak, supernova-like Si II near 5720Angstroms (0.1c), starting 1.95 days after the burst trigger. UBVRI photometryobtained between 1 and 26 days post-burst confirms the early rise of supernovalight, and suggests a short time delay between the gamma-ray burst and theonset of SN 2006aj if the early appearance of a soft component in the X-rayspectrum is understood as a ``shock breakout''. Together, these results verifythe long-hypothesized origin of soft gamma-ray bursts in the deaths of massivestars.Comment: 5 pages, 2 figure

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