[AAVSO-HEN] GRB 070508: Optical afterglow detection

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  6386
SUBJECT: GRB 070508: Optical afterglow detection
DATE:    07/05/08 05:22:41 GMT
FROM:    Edo Berger at Carnegie Obs  <eberger at ociw.edu>

E. Berger (Carnegie) and A. Burgasser (MIT) report:

"We observed the position of GRB 070508 (GCN 6383) with MAGIC on the 
Magellan/Clay 6.5 m telescope starting 28 min after the burst.  In a 180 
sec I-band image we detect a bright object not visible in DSS within the 
XRT error circle at:
 	RA  = 20:51:12.07
 	DEC = -78:23:07.0
with an uncertainty of about 0.5".  This is about 2.5" away from the UVOT 
position."