Grupo de Sistemas Estelares

Pedersen, H., Hjorth, J., Jensen, B. L., Andersen, M. I., Fynbo, J. P. U., Gorosabel, J., Kaas, A. A., Takalo, L., and Rekola, R.
GRB Coordinates Network, 925, 1 (2001)
12/2001

ABSTRACT

"Using the 2.56-m Nordic Optical Telescope (+ALFOSC), La Palma, we have obtained a total of eight images which cover the error box (Hurley, GCN 922) by means of four consecutive pointings:

            UT                      Filter            Exp.time               Seeing
===========================================================
2001 January 27.21          R               (4 x ) 180 s           0.85" FWHM
2001 January 28.13          R               (4 x ) 180 s           0.90" FWHM

Intercomparison of the images has revealed no candidate counterpart to magnitude ~22.5 .

The object reported by Bartolini et al. (GCN 924) is detected on two overlapping exposures, i.e. 360 s, at each epoch. Using the nearby USNO star U1350_08031605 as reference, we find R = 21.17 +/- 0.20 (epoch 1) and R = 21.29 +/- 0.20 (epoch 2), i.e. consistent with no variability."