The Library
GRB 070714B-discovery of the highest spectroscopically confirmed short burst redshift
Tools
Graham, J. F., Fruchter, A. S., Levan, A. J., Melandri, A., Kewley, L. J., Levesque, E. M., Nysewander, M., Tanvir, N. R., Dahlen, T., Bersier, D., Wiersema, K., Bonfield, D. G. and Martinez-Sansigre, A. (2009) GRB 070714B-discovery of the highest spectroscopically confirmed short burst redshift. Astrophysical Journal, Vol.698 (No.2). pp. 1620-1629. doi:10.1088/0004-637X/698/2/1620 ISSN 0004-637X.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1088/0004-637X/698/2/1620
Abstract
We detect the optical afterglow and host galaxy of GRB 070714B. Our observations of the afterglow show an initial plateau in the light curve for approximately the first 5-25 minutes, and then steepening to a power-law decay with index alpha = 0.86 +/- 0.10 for the period between 1 and 24 hr postburst. This is consistent with the X-ray light curve which shows an initial plateau followed by a similar subsequent decay. At late time, we detect a host galaxy at the location of the optical transient. Gemini Nod & Shuffle spectroscopic observations of the host show a single emission line at 7167 angstrom which, based on a griz JHK photometric redshift, we conclude is the 3727 angstrom [O II] line. We therefore find a redshift of z = 0.923. This redshift, as well as a subsequent probable spectroscopic redshift determination of GRB 070429B at z = 0.904 by two other groups significantly exceeds the previous highest spectroscopically confirmed short burst redshift of z = 0.546 for GRB 051221. This dramatically moves back the time at which we know short bursts were being formed and suggests that the present evidence for an old progenitor population may be observationally biased.
Item Type: | Journal Article | ||||
---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | Astrophysical Journal | ||||
Publisher: | IOP Publishing | ||||
ISSN: | 0004-637X | ||||
Official Date: | 20 June 2009 | ||||
Dates: |
|
||||
Volume: | Vol.698 | ||||
Number: | No.2 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 1620-1629 | ||||
DOI: | 10.1088/0004-637X/698/2/1620 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
Data sourced from Thomson Reuters' Web of Knowledge
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |