GCN Circular 2830
Subject
GRB 041006: Optical Observations
Date
2004-11-04T06:28:19Z (20 years ago)
From
Grant Williams at Steward Observatory <gwilliams@as.arizona.edu>
G. Williams, X. Fan, A. Diamond-Stanic, M. Bayliss, D. Reichart, S. Shaw,
A. Homewood, D. H. Hartmann, and M. Schwartz report on behalf of the MMTO,
U. North Carolina, and SARA GRB teams of the FUN GRB collaboration:
We observed the afterglow location (Da Costa et al., GCN 2765) of GRB
041006 (Galassi et al., GCN 2770) in Bg'VRc beginning 14.9 hours after the
burst. Using the field calibration of Henden (GCN 2801), we report the
following magnitudes:
Start Mean Time Filter Exposure Magnitude Telescope
Date Since GRB Time (sec) (1)
(hours) x Exposures
Oct 7.134 15.127 Rc 300 x 5 >19.3 0.9m SARA
Oct 7.153 15.582 B 300 x 5 >18.2 0.9m SARA
Oct 7.110 16.250 Rc 180 x 36 >19.3 0.6m MO(2)
Oct 7.172 16.426 V 300 x 14 21.2+/-0.6 0.9m SARA
Oct 7.280 18.408 g' 300 x 2 21.75+/-0.08 2.3m Bok
(1) Limiting magnitudes are 2 sigma.
(2) Morehead Observatory
Previously reported in GCN 2799, the SARA observations are updated now
that the field calibration is available.
A light curve is available at:
http://www.physics.unc.edu/~mbayliss/grbdata/grb041006lc.eps