GCN Circular 3077
Subject
GRB 050306: No Swift UVOT Optical Counterpart Detected
Date
2005-03-08T12:41:47Z (19 years ago)
From
Pete Roming at PSU <roming@astro.psu.edu>
A. Blustin (MSSL), P. Brown (PSU), S. Rosen, K. McGowan, M. De Pasquale
(MSSL), P. Boyd (GSFC/UMBC), S. T. Holland, M. Still (GSFC/USRA), W.
Landsman (GSFC), S. Hunsberger (PSU), A. Breeveld (MSSL), P. Roming (PSU),
K. Mason, P. Schady (MSSL), M. Ivanushkina (PSU), T. Poole (MSSL), C.
Gronwall (PSU), B. Hancock (MSSL), S. Koch (PSU), M. Carter, H. Huckle
(MSSL), P. Broos (PSU), T. Kennedy, P. Smith (MSSL), J. Nousek (PSU), N.
Gehrels (GSFC), on behalf of the Swift UVOT team.
The Swift Ultra-Violet/Optical Telescope (UVOT) began observations of
GRB050128 (GCN 3071) on February 7, 2005 at 14:58:53 UT. Before this time
GRB 050306 was within the Swift Moon avoidance angle. Over an 8,630s
exposure combined from four snapshots between 35 and 41 hours after the
trigger, we detect no new or variable source down to a V magnitude of 21.2
(5-sigma upper limit) in the BAT error circle. This includes the position
of the X-ray candidate reported in GCN 3072.