GCN Circular 6894
Subject
GRB 071011: MARGE Optical Limits
Date
2007-10-11T21:17:44Z (17 years ago)
From
Heather Swan at U.of Michigan/ROTSE <hflewell@umich.edu>
H. Swan (U Mich), I. Smith (Rice), C. Akerlof (U Mich), and M.
Skinner (Boeing) report on behalf of the MARGE collaboration:
The AEOS Burst Camera (ABC) on the AEOS telescope, located at the Maui
Space Surveillance System on Haleakala, observed the field of GRB071011
(Swift trigger 293924 (F. E. Marshall et al, GCN 6882)). The images are
unfiltered 10s exposures which started ~6 minutes after the trigger and
ended ~ 1 hour later. We see the OT candidate observed by Perley et al
(GCN 6883), but it does not fade (between 6-60 minutes).
The first image which contains the XRT position (B. Sbarufatti et al,
GCN 6891) occurred at 20 minutes after the Swift trigger. We coadded
the ABC images into sets of 10 and observe three distinct closely spaced
stellar objects within 7 arc-seconds of the XRT coordinates given in GCN
6891. These appear to be consistent with a set of unresolved stars in
the DSS plates (second epoch) suggesting that no new sources have been
found within the 3-sigma XRT error circle.