[vsnet-grb-info 13511] GRB 130610A: Skynet/PROMPT detection of the optical afterglow

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14844
SUBJECT: GRB 130610A: Skynet/PROMPT detection of the optical afterglow
DATE:    13/06/10 03:57:35 GMT
FROM:    Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet  <atrotter at physics.unc.edu>

A. Trotter, J. Haislip, A. LaCluyze, D. Reichart, T. Berger, M. Carroll, 
H. T. Cromartie, R. Egger, A. Foster, C. Foster, N. Frank, K. Ivarsen, 
D. James, M. Maples, J. Moore, M. Nysewander, E. Speckhard, P. Taylor 
and J. A. Crain report

Skynet observed the Swift/XRT localization of GRB 130610A (Cummings et 
al., GCN 14842, Swift trigger #557845), starting at 2013-06-10, 03:14:05 
UT (t=2.03m post-trigger), with three 16" telescopes of the PROMPT array 
at CTIO, Chile.  We detect a fading afterglow in B, V and I bands at: RA 
= 14:57:40.9, Dec = 28:12:25.5 (J2000.0), consistent with the UVOT 
source position reported in GCN 14842.

The afterglow rises until t~3.4m, at which time the apparent magnitudes 
are B~18.1, V~17.1, I~16.6.  A preliminary light curve is at:
http://www.skynet.unc.edu/grb/grb130610a.png

Magnitudes are in the Vega system and photometry is calibrated to 4 SDSS 
stars in the field.

Skynet observations are ongoing.