GCN Circular 4155
Subject
GRB 051022: Swift/UVOT Upper Limits
Event
Date
2005-10-24T07:06:22Z (21 years ago)
From
Stefan Immler at NASA/GSFC <immler@milkyway.gsfc.nasa.gov>
S. Immler (GSFC), A. Retter (PSU), J. Racusin (PSU),
L. Cominsky (Sonoma State U), J. Norris (GSFC)
on behalf of the Swift/UVOT team report:
The Swift-UVOT began observing the field of GRB 051022
(HETE Trigger H3950; Olive et al. GCN 4131) at 2005-10-22
16:34:11, about 3.5 hours after the burst.
Based on comparisons with the DSS catalog, we detect
no source inside the XRT error circle at RA, Dec
23:56:4.1, +19:36:25.1 (J2000) with an uncertainty of
4 arcsec (Racusin et al. GCN 4141) in any of the 5 filters
or in summed V-band exposures down to the following 5-sigma
magnitude upper limits:
Filter T_range(hours) Exp(sec) 5sigUL
V 3.47-3.72 900 19.5
B 5.63-5.65 63 18.9
U 5.38-5.63 900 20.1
W1 3.98-4.36 900 19.3
M2 3.73-3.98 900 20.4
V 6.78-13.48 7914 20.7
where T_range is the time post HETE trigger.
The magnitudes have not been corrected for extinction.