GCN Circular 5719
Subject
GRB061007: Swift UVOT followup observations
Event
Date
2006-10-08T13:53:47Z (20 years ago)
From
Patricia Schady at MSSL/Swift <ps@mssl.ucl.ac.uk>
P. Schady (MSSL/UCL) and S. Pandey (MSSL/UCL) report on behalf of the
Swift/UVOT team:
The Swift/UVOT began taking data in the field of GRB061007 on 2006-10-07, 80s
after the BAT trigger (Schady et al., GCN 5707), discounting the 10s settling
image. The afterglow reported by Rykoff & Rujopakarn (GCN 5706), is clearly
detected in all six UVOT lenticular filters, and decaying rapidly with a decay
index of ~1.6. The refined position of the afterglow is RA = 03:05:19.6, Dec=
-50:30:02.4 (J2000).
The magnitude of the afterglow in each UVOT filter are given below for the
first exposure taken, and the first long exposure of duration 197s. In the case
of the UVW2 filter, the exposures after 619s after the BAT trigger
had to be coadded to get a detection.
Filter T+(s) Exp(s) Mag
V 395 393 12.84 +/- 0.01
6397 197 17.93 +/- 0.01
B 678 10 14.42 +/- 0.08
5783 197 18.30 +/- 0.08
U 657 19 14.13 +/- 0.05
5578 197 17.77 +/- 0.07
UVW1 635 19 14.89 +/- 0.08
6807 197 19.29 +/- 0.31
UVM2 611 19 16.10 +/- 0.15
6602 197 20.30 +/- 0.69 (1sig)
UVW2 711 19 16.75 +/- 0.17
14813 1279 20.96 +/- 0.36 (1sig)
T+ is the start time of the exposure since the BAT trigger. In the second
reported UVW2 exposure T+ is the midtime of 3 coadded exposures. These
magnitudes are not corrected for the expected extinction of E(B-V)=0.021,
or for coincidince loss.