[vsnet-grb-info 2207] GRB 050922C: further VLT observations

Thu Sep 29 02:19:53 JST 2005

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4046
SUBJECT: GRB 050922C: further VLT observations
DATE:    05/09/28 17:17:39 GMT
FROM:    Stefano Covino at Brera Astronomical Observatory  <covino at merate.mi.astro.it>

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S. Covino, S. Piranomonte, D. Fugazza, F. Fiore, D. Malesani, G.
Tagliaferri, G. Chincarini, L. Stella on behalf of the MISTICI
collaboration report:

We are following the decay of the optical afterglow of GRB 050922C
(Norris et al., GCN 4013) with the ESO VLT+FORS1. 
Multi-band BVR photometry was carried out on September 24 at 00:10 UT,
about 1.2 days after the high-energy event.
A preliminary calibration, based on Landolt standard stars, have been
performed and the OT magnitude in the R band was:

R = 21.57 +/- 0.05 

confirming the break in the light curve reported by Fynbo et al. (GCN
4040). 

This message can be quoted.

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S. Covino, S. Piranomonte, D. Fugazza, F. Fiore, D. Malesani, G. Tagliaferri, G. Chincarini, L. Stella on behalf of the MISTICI collaboration report: 
 
We are following the decay of the optical afterglow of GRB 050922C (Norris et al., GCN 4013) with the ESO VLT+FORS1. 
Multi-band BVR photometry was carried out on September 24 at 00:10 UT, about 1.2 days after the high-energy event. 
A preliminary calibration, based on Landolt standard stars, have been performed and the OT magnitude in the R band was: 
 
R = 21.57 +/- 0.05 
 
confirming the break in the light curve reported by Fynbo et al. (GCN 4040). 
 
This message can be quoted.
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