GCN Circular 6036
Subject
GRB 070125: UVOT Observations of a Fading Optical Afterglow
Date
2007-01-26T17:20:23Z (17 years ago)
From
Frank Marshall at GSFC <marshall@milkyway.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) and J. Racusin (PSU) report on behalf
of the Swift team:
Swift/UVOT observed the field of GRB 070125 (Hurley et al., GCN Circ. 6024)
starting 13 hours after the burst. A bright, fading source
at the position reported by Cenko (GCN Circ. 6034)
is detected with the V and B filters. Additional observations
are now being taken with the other UVOT filters.
The table below gives the measured magnitudes for the currently
available data. T_start and T_end are the start and stop
times of the summed exposures in seconds from the trigger.
No correction has been made for the expected
Galactic reddening of E(B-V) = 0.05.
Filter T_start T_end Exposure Mag Error
V 46685 53261 1736 18.54 0.06
V 58269 63986 1590 18.74 0.07
B 47550 54163 1674 18.92 0.03
B 59126 59947 798 19.03 0.06