Skip to main content
Announcing GCN Classic Migration Survey, End of Legacy Circulars Email. See news and announcements

GCN Circular 6445

Subject
GRB 070521: SARA upper limit
Date
2007-05-22T00:21:31Z (18 years ago)
From
Adria C. Updike at Clemson U <aupdike@clemson.edu>
A. C. Updike, J. R. Puls, and D. H. Hartmann (Clemson University) report 
on behalf of the Clemson GRB Follow-Up Team:

We imaged the field of GRB 070521 (GCN 6431, Guidorzi et al.) beginning 
14 minutes after the trigger (279935) with the SARA 0.9m at Kitt Peak 
under decent weather conditions.  In 50 minutes of stacked exposures in 
the R band, we detect no new sources in the XRT error circle down to a 
limiting magnitude of 20 +/- 0.4.  We do not detect the source noted by 
Hattori et al. (GCN 6444).  This magnitude is based on calibration to 5 
USNO B1.0 stars.

The SARA Homepage can be found at:
 http://saraobservatory.org

This message may be cited.
Looking for U.S. government information and services? Visit USA.gov