[vsnet-grb-info 5539] GRB 080120: GROND confirmation of the optical
afterglow
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Tue Jan 22 18:10:22 JST 2008
TITLE: GCN CIRCULAR
NUMBER: 7202
SUBJECT: GRB 080120: GROND confirmation of the optical afterglow
DATE: 08/01/22 09:10:16 GMT
FROM: Thomas Kruehler at MPE/MPI <kruehler at mpe.mpg.de>
T. Kruehler, J. Greiner, S. McBreen, S. Loew, A. Kuepcue-Yoldas, C. Clemens, A. Yoldas
(all MPE Garching) report on behalf of the GROND team:
We observed the field of the INTEGRAL burst GRB 080120 (Mereghetti et al. 2008, GCN #7194) with the 2.2 m MPI/ESO telescope equipped with the multi-channel imager GROND.
Observations started at 07:04 UTC on the 22nd of January at an airmass of 2.5 and seeing around 1.0".
The optical/NIR source (Kruehler et al. 2008, GCN #7197, P. Schady et al. 2008, GCN #7198) inside the XRT-error circle (Sbarufatti et al. 2008, GCN #7195) is still detected, and clearly fading. Fitting a power-law to the two epochs yields a slope around 1.5.
A finding chart will be posted at: www.mpe.mpg.de/~jcg/grb080120.html
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