GCN Circular 5284
Subject
GRB 060515: Upper Limit on Host Galaxy
Event
Date
2006-07-04T19:02:08Z (20 years ago)
From
Alexander Kann at TLS Tautenburg <kann@tls-tautenburg.de>
D. A. Kann (Thueringer Landessternwarte Tautenburg), and S. Manohar (USC/
Los Angeles), report:
We observed the field of GRB 060515 (Cummings et al., GCN 5132) with the
Tautenburg 1.34m Schmidt telescope under good observing conditions. Seeing
and transparency were very good, but sky background was high due to the
moderate distance from the Sun. We obtained 16 x 600 sec images in the Rc
filter for a total integration time of 160 minutes. The mean observation
time was July 2.4928 UT (8 x 600 sec images in one night each), which is
48.39 days after the burst. We determine the zero point of the image in
comparison with nine unsaturated and isolated stars of the USNOB1.0
catalog. Astrometry is also performed against the USNOB1.0 catalog.
At the refined position of the X-ray afterglow (Page et al., GCN 5139), we
do not detect any sources. The 2 sigma limiting magnitude of the image is
Rc=23.6. This magnitude is not corrected for the small foreground
extinction, E(B-V)=0.027.
We detect three sources closeby (positions with errors of 0."5, photometry
errors statistical only):
RA=08:29:10.92, Dec=+73:34:07.70 Rc = 20.19 +\- 0.02 (also in the
USNOB1.0 catalog)
RA=08:29:08.01, Dec=+73:34:09.01 Rc = 22.29 +\- 0.11
RA=08:29:08.29, Dec=+73:33:56.67 Rc = 21.64 +\- 0.06
All three objects are stellar at our plate scale (1."23/pixel).
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