GCN Circular 6111
Subject
GRB 070219: Swift/UVOT Upper limits
Date
2007-02-19T14:14:41Z (17 years ago)
From
Alice Breeveld at MSSL-UCL <aad@mssl.ucl.ac.uk>
A. Breeveld (MSSL/UCL) and T. Sakamoto (NASA/ORAU) report on behalf of
the Swift UVOT team:
The Swift/UVOT observed the field of GRB 070219 starting 68s after the
BAT trigger (Sakamoto et al. 2007, GCN Circ. 6104). We do not find any
source, in any of the UVOT observations, inside the XRT error circle.
The 3-sigma upper limits for detecting a source inside the XRT error
circle in the co-added frames are:
Filter T_start T_stop Exp(s) Mag(3-sigma UL)
--------------------------------------------------------
V 68 18502 2032 20.3
B 670 6909 432 20.4
U 646 13201 980 20.4
UVW1 622 12659 1160 21.0
UVM2 598 18983 1627 21.5
UVW2 698 17588 1356 21.5
White 87 7114 618 20.7
The values quoted above are not corrected for the expected Galactic
extinction corresponding to a reddening of E(B-V) = 0.035 towards the
direction of the burst (Schlegel et al. 1998)