GCN Circular 5645
Subject
GRB 060926: Swift-UVOT UVW1 Detection Retraction
Event
Date
2006-09-28T14:57:57Z (19 years ago)
From
Pete Roming at PSU <roming@astro.psu.edu>
P. Roming (PSU) and S. T. Holland (GSFC/USRA) report on behalf of the
Swift-UVOT team:
Due to an error in the flux calculation, the reported UVW1 (251 nm) filter
detection in GCN 5625 is not real. No optical afterglow is detected at the
3-sigma level in individual or coadded exposures in this filter. The
3-sigma limiting magnitude for the coadded images is listed below:
Filter T_range(s) Exp(s) Upper Limit (3-sigma)
UVW1 487-11748 1337 20.4
where T_range is the start and end times of the coadded exposures. No
correction has been made for Galactic reddening along the line of sight
(E(B-V) = 0.16). We also point out that the 4.8-sigma level V-filter
detection report in GCN 5625 is real. We apologize for any inconvenience
this error has created.