[vsnet-grb-info 5226] GRB 071013: TLS Upper Limit
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Tue Oct 16 05:08:51 JST 2007
TITLE: GCN CIRCULAR
NUMBER: 6917
SUBJECT: GRB 071013: TLS Upper Limit
DATE: 07/10/15 20:08:41 GMT
FROM: Alexander Kann at TLS Tautenburg <kann at tls-tautenburg.de>
D. A. Kann, C. Hoegner & R. Filgas (TLS Tautenburg) report:
We observed the field of GRB 071013 (Marshall et al., GCN 6907) with the
Tautenburg 1.34m Schmidt telescope under good conditions, obtaining 13 600
second images in the Rc band. Within the revised BAT error circle (Palmer
et al., GCN 6911), we find no new sources in comparison to the DSS. We
note that our stacked image is much deeper than the DSS, and contains many
additional faint sources. More precise analysis awaits the publication of
a Swift XRT position.
Assuming the USNO B1.0 star at RA (J2000) = 18:38:05.67, Dec. (J2000) =
+33:54:14.61 to have R2=17.22, we derive the following magnitude limit for
regions not close to bright stars:
Date Mid-Time Rc limit (2 sigma)
13.79254 0.28608 23.0
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