[vsnet-grb-info 2074] GRB 050904: SOAR/PROMPT Observations

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3913
SUBJECT: GRB 050904: SOAR/PROMPT Observations
DATE:    05/09/04 10:00:28 GMT
FROM:    Daniel E. Reichart at U.North Carolina  <reichart at physics.unc.edu>

J. Haislip, D. Reichart, E. Cypriano, S. Pizzaro, A. LaCluyze, J. Rhoads,
E. Figueredo report on behalf of the UNC team of the FUN GRB Collaboration.

We imaged the XRT localization of GRB 050904 (Cummings et al., GCN 3910)
with 4.1m SOAR at CTIO beginning about three hours after the burst.  We
detect a relatively bright (J ~ 17.5 mag) and fading source within
the XRT error circle:

RA:  00 54 51.3
DEC  14 05 09.7

There is no source at this location in POSS2 or SDSS.

Near-simultaneous imaging with PROMPT reveals no source to about the POSS2
detection limit.

This suggests that the afterglow is either very extinguished or at high
redshift.