Optically Selected GRB Afterglows

Details Optically Selected GRB Afterglows Optically Selected GRB Afterglows

2006-02-16

arxiv.org/abs/astro-ph/0602370v1

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, proceeding of the Swift Symposium

Scientific paper

10.1393/ncb/i2007-10337-3

Since November 2004, we attempt to detect GRB optical afterglows in near real-time on images taken at the Canada France Hawaii Telescope within the Very Wide Survey, component of the CFHT Legacy survey. To do so, a Real Time Analysis System automatically and quickly analyzes MegaCAM images and extracts from them a list of photometrically and astrometrically variable objects which is then validated by a member of the collaboration. Each month, we repeatedly observe 15 to 30 square degrees down to magnitude i' = 22.5. A few objects are classified as candidates and analyzed more deeply, and statistics are done showing the treatment's performance.

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