GCN Circular 19168
Subject
GRB 160310A: Swift/UVOT Upper Limits
Date
2016-03-11T22:47:55Z (9 years ago)
From
Frank Marshall at GSFC <femarsha@khamseen.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) and A. Maselli (INAF/IASF)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160310A
40247 s after the LAT trigger (Vianello et al., GCN Circ. 19158).
No source is detected in the initial UVOT exposures
at a position consistent with the position
of the possible XRT afterglow (Gibson et al., GCN Circ. 19162)
or the possible optical counterpart (Kruehler et al., GCN Circ. 19164).
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
u 40247 46726 1273 >20.4
white 41072 41890 805 >21.3
v 41897 42757 843 >19.9
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.53 in the direction of the burst
(Schlegel et al. 1998).