GCN Circular 6293

Subject

GRB070412: Swift UVOT observations

Event

Date

2007-04-12T18:03:03Z (19 years ago)

From

Patricia Schady at MSSL/Swift <ps@mssl.ucl.ac.uk>

P. Schady (MSSL/PSU) and P.Romano (Univ. Bicocca & INAF-OAB) report on 
behalf of the Swift UVOT team:

  Swift/UVOT observed the field of GRB 070412 starting 97.6s after the 
BAT trigger. No new source is detected within the XRT refined position 
(GCN 6282Loading...
 
 ) or at the position reported by Jelinek et al. (GCN 6279Loading...
 
 ) and 
Berger et al. (GCN 6280Loading...
 
 ) in any of the UVOT filters, in either single 
or co-added exposures. The 3-sigma upper limits for the co-added 
exposures in each filter are as follows:

Filter        T_mid       Exp.     Mag 3-sig UL
                     (s)           (s)
White       9252        936      20.55
V               17432     1769    20.52
B               5763        171      20.22
U               23567     1082    21.12
UVW1       23107     1284   20.52
UVM2       19141     1082   20.65
UVW2       14440     1195   20.94

where T_mid is the weighted mid time of the co-added images. The 
reported upper limits are uncorrected for the estimated Galactic 
reddening of E(B-V) = 0.02 mag.