GCN Circular 10090
Subject
GRB 091020: Late TLS detection
Event
Date
2009-10-27T02:31:21Z (17 years ago)
From
Alexander Kann at TLS Tautenburg <kann@tls-tautenburg.de>
D. A. Kann, U. Laux, M. Roeder & H. Meusinger (TLS Tautenburg) report:
We observed again the afterglow of the Swift GRB 091020 (Racusin et al.,
GCN 10048) with the 1.34m Schmidt telescope of the Thueringer
Landessternwarte Tautenburg, Germany, on the 26th of October, 5.2 days
after the GRB. We obtained 11 x 600 sec images in Rc before clouds shut us
down again. At the position of the afterglow, we detect a faint source in
the stacked image.
We derive the following afterglow magnitudes using the same comparison
star as Kann et al., GCN 10076:
dt Filter mag dmag
____________________________________
5.213357 Rc 23.62 0.31
Kann et al., GCN 10076, found a single power-law decay with alpha = 1.12
+/- 0.06. Compared to the extrapolation of this fit, there is no
significant evidence for a break yet.
No further observations are possible due to an instrument change.
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