[AAVSO-HEN] GRB 090813: I-band observations from 1.5m OSN telescope

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  9820
SUBJECT: GRB 090813: I-band observations from 1.5m OSN telescope
DATE:    09/08/17 15:09:25 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu at iaa.es>

J. Gorosabel (IAA-CSIC), A. de Ugarte Postigo (INAF-OAB), A. Sota (IAA- 
CSIC),  S. Guziy (IAA-CSIC),  M. Jelinek (IAA-CSIC), P. Kubanek (IAA- 
CSIC & IPL Univ. Valencia), A.J. Castro-Tirado (IAA-CSIC), report;

We performed I-band observations of the GRB 090813 optical afterglow  
(Gorosabel et al. GCN 9782; Cenko et al. GCN 9783; Smith et al. GCN  
9784) with the 1.5m telescope of Observatorio de Sierra Nevada. The  
observations were carried on Aug 13.8979 - 13.9667 UT with a total  
exposure time of 4950 seconds. No object brigther than I = 21.9 was  
detected at the afterglow position.