Discovery of the Highest Spectroscopically Confirmed Short GRB Redshift

Details Discovery of the Highest Spectroscopically Confirmed Short GRB Redshift Discovery of the Highest Spectroscopically Confirmed Short GRB Redshift

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1003g&link_type=abstract

American Astronomical Society, AAS Meeting #211, #10.03; Bulletin of the American Astronomical Society, Vol. 39, p.742

Astronomy and Astrophysics

Astronomy

Scientific paper

Gemini Nod & Shuffle spectroscopy on the host of the short GRB 070714B shows a single emission line at 7165 angstroms which, based on a grizJHK photometric redshift, we conclude is the 3727 [O II] line. This places the host at a redshift of z=.92 exceeding the previous record for the highest spectroscopically confirmed short burst redshift of z=.55 held by 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.

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