[AAVSO-HEN] GRB 100206A: Optical limit

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The following is a GCN Circular circulated via the AAVSO network.
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TITLE:   GCN CIRCULAR
NUMBER:  10380
SUBJECT: GRB 100206A: Optical limit
DATE:    10/02/06 18:34:33 GMT
FROM:    Dipankar Bhattacharya at IUCAA  <dipankar at iucaa.ernet.in>

D. Bhattacharya, Vijay Mohan, A.N. Ramaprakash, Chaitanya
Rajarshi (IUCAA) and Kuntal Misra (STScI)report:

We imaged the field of GRB100206A (Krimm et al. GCN 10376,
Goad et al GCN 10378) using the 2-m telescope of the IUCAA
Girawali Observatory. Four 15-min exposures in R-band were
taken on 06 Feb 2010 starting at 15:46 UT.  The stacked
1 hour exposure shows no optical transient to a limiting
magnitude of R ~22.  The extended source reported by Miller
et al (GCN 10377) is however clearly detected.