[vsnet-grb-info 3095] GRB 060218SN 2006aj: optical observations at Rozhen Observatory

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4932
SUBJECT: GRB 060218SN 2006aj: optical observations at Rozhen Observatory
DATE:    06/03/28 13:01:08 GMT
FROM:    Evgeni Semkov at Inst.of Astronomy,Bulgaria  <evgeni at skyarchive.org>

E. Semkov (IA, BAS) on behalf of the BAS/CNRS collaboration report:

We observed the afterglow of GRB 060218 (Cusumano et al., GCN 4775;
Marshall et al., GCN 4800) with the 2m RCC telescope at the National
Astronomical Observatory Rozhen (Bulgaria) on Mar. 21 and 26. The
calibration was made using comparison stars from Hicken et al. (GCN 4898)
and Modjaz et al. (astro-ph/0603377). Observations were made under good
atmospheric conditions through a standard Johnson-Cousins set of filters.

The optical counterpart was detected at the following magnitudes:

Date,   UT(R),  I,               R,               V
Mar 21  18:45   17.921 (0.062)   18.340 (0.027)   18.589 (0.026)
Mar 26  18:00   18.106 (0.057)   18.429 (0.022)   18.916 (0.024)

This message may be cited.