dc.contributor.author | Fong, W | |
dc.contributor.author | Berger, Edo | |
dc.contributor.author | Chornock, R | |
dc.contributor.author | Tanvir, N. R. | |
dc.contributor.author | Levan, A. J. | |
dc.contributor.author | Fruchter, A. S. | |
dc.contributor.author | Graham, J. F. | |
dc.contributor.author | Cucchiara, A. | |
dc.contributor.author | Fox, D. B. | |
dc.date.accessioned | 2017-02-22T20:56:58Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Fong, W., E. Berger, R. Chornock, N. R. Tanvir, A. J. Levan, A. S. Fruchter, J. F. Graham, A. Cucchiara, and D. B. Fox. 2011. The optical afterglow and z = 0.92 early-type host galaxy of the short GRB 100117A. The Astrophysical Journal 730, no. 1: 26. doi:10.1088/0004-637x/730/1/26. | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:30410833 | |
dc.description.abstract | We present the discovery of the optical afterglow and early-type host galaxy of the short-duration GRB 100117A. The faint afterglow is detected 8.3 hr after the burst with rAB = 25.46 ± 0.20 mag. Follow-up optical and near-IR observations uncover a coincident compact red galaxy, identified as an early-type galaxy at a photometric redshift of z ≈ 0.6 − 0.9 (2σ) with a mass of ∼ 3 × 1010 M⊙, an age of ∼ 1 Gyr, and a luminosity of LB ≃ 0.5L∗. Spectroscopic observations of the host reveal a notable break corresponding to the Balmer/4000Å break at z ≈ 0.9, and stellar population spectral evolution template fits indicate z ≈ 0.915, which we adopt as the redshift of the host, with stellar population ages of ∼ 1−3 Gyr. From a possible weak detection of [O II]λ3727 emission at z = 0.915 we infer an upper bound on the star formation rate of ∼ 0.1 M⊙ yr−1, leading to a specific star formation rate of . 0.004 Gyr−1. Thus, GRB 100117A is only the second short burst to date with a secure early-type host (the other being GRB 050724 at z = 0.257) and it has one of the highest short GRB redshifts. The offset between the host center and the burst position, 470 ± 310 pc, is the smallest to date. Combined with the old stellar population age, this indicates that the burst likely originated from a progenitor with no significant kick velocity. However, from the brightness of the optical afterglow we infer a relatively low density of n ≈ 3×10−4 ǫ −3 e,−1 ǫ−1.75 B,−1 cm−3. The combination of an optically faint afterglow and host suggest that previous such events may have been missed, thereby potentially biasing the known short GRB host population against z & 1 early-type hosts. | en_US |
dc.description.sponsorship | Astronomy | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | IOP Publishing | en_US |
dc.relation.isversionof | doi:10.1088/0004-637x/730/1/26 | en_US |
dc.relation.hasversion | https://arxiv.org/pdf/1012.4009.pdf | en_US |
dash.license | OAP | |
dc.subject | gamma-rays: bursts | en_US |
dc.title | The optical afterglow and z = 0.92 early-type host galaxy of the short GRB 100117A | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Accepted Manuscript | en_US |
dc.relation.journal | The Astrophysical Journal | en_US |
dash.depositing.author | Berger, Edo | |
dc.date.available | 2017-02-22T20:56:58Z | |
dc.identifier.doi | 10.1088/0004-637x/730/1/26 | * |
dash.contributor.affiliated | Fong, W | |
dash.contributor.affiliated | Chornock, R | |
dash.contributor.affiliated | Berger, Edo | |