[vsnet-grb-info 8237] GRB 090809: WHT observations
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Tue Aug 11 02:50:31 JST 2009
TITLE: GCN CIRCULAR
NUMBER: 9762
SUBJECT: GRB 090809: WHT observations
DATE: 09/08/10 17:50:15 GMT
FROM: Klaas Wiersema at U of Leicester <kw113 at star.le.ac.uk>
K. Wiersema (Leicester), D. Malesani (DARK/NBI), A. Levan, D. Steeghs, L. van
Spaandonk (Warwick) report on behalf of a larger collaboration:
We observed the field of GRB 090809 (Markwardt et al. GCN 9754) with the
William Herschel Telescope using the ACAM instrument. Observations
consisted of 4 x 300 second exposures with a sloan i filter, starting on
August 9, 23:41 UT (6.16 hrs after burst). We clearly detect the afterglow
(Markwardt et al. GCN 9754, Xu et al. GCN 9755) with i = 20.48 +/- 0.03
(calibrated using SDSS stars).
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