TITLE:   GCN CIRCULAR
NUMBER:  9842
SUBJECT: GRB 090817 - TLS Observations
DATE:    09/08/27 00:27:50 GMT
FROM:    Alexander Kann at TLS Tautenburg  <kann@tls-tautenburg.de>

D. A. Kann, F. Cusano and F. Ludwig (TLS Tautenburg) report:

We observed the field of the INTEGRAL/Fermi GRB 090817 (Beckmann et al., 
GCN 9815, Wilson-Hodge, GCN 9823) with the 1.34m Tautenburg Schmidt 
telescope under good conditions. We obtained 3 x 600 sec Rc images at a 
mid-time of 8.015 days after the GRB.

At the position of the X-ray afterglow (Evans, Guidorzi & Baumgartner, 
GCN 9819, GCN 9825), the USNO-B1.0 object 1341-0096763 is clearly 
detected. Using the comparison star of Rumyantsev, Pozanenko & Andreev 
(GCN 9828), we find Rc = 19.54 +/- 0.03 mag. This is in agreement 
with the reports of non-variability (Rumyantsev, Pozanenko & Andreev, 
GCN 9828, Halpern & Ruan, GCN 9837) of this proposed host galaxy/SN 
candidate (Holland, Breeveld & Baumgartner, GCN 9831, GCN 9834), and a 
stellar PSF is in full agreement with it being a foreground star (Halpern 
& Ruan, GCN 9837, Cenko et al., GCN 9841).

No further observations are planned.

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