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GCN Circular 3626

GRB 050716: Optical Observations
2005-07-16T14:56:39Z (19 years ago)
Ken ichi Torii at RIKEN <>
K. Torii (Osaka U.) reports on behalf of the ART collaboration:

 The error region of GRB 050716 (Rol et al. GCN 3623) was observed by
the Automated Response Telescope. The observation started at 2005 July
16 12:38:26 UT (142 s after the trigger) and BVRcIc frames of 60s
integration were acquired.

 We do not detect an optical counterpart of the X-ray afterglow (GCN
3623, 3624) and derive its 3-sigma upper limit relative to
USNO-B1.0 magnitude as follows.

Start(UT) Filter Mag   Exposure
12:55:06  Ic     >16.5 60s x27
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