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GCN Circular 339

Subject
X-ray/GRB 1SAX J0835.9+5118, Optical Observation
Date
1999-05-21T15:55:42Z (25 years ago)
From
Arne A. Henden at USNO/USRA <aah@nofs.navy.mil>
A. Henden (USRA/USNO), F. Vrba, C. Luginbuhl, R. Stone,
B. Canzian, J. Munn, S. Levine, H. Guetter (USNO)
report:

We monitored the field of the BeppoSAX fast X-ray transient 1SAX J0835.9+5118
(Piro GCN 333, Gandolfi et al., IAUC 7174) on the night of UT 990521
with the USNO 1.0-m telescope.  The night was photometric during the
observations, though cirrus arrived shortly thereafter.  Enough
standards were observed to calibrate the field in BVRI.  The calibration
file can be found on
  ftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/j0835.dat
where 19 Landolt standards were used for the photometric calibration, and
USNO-A2.0 was used for the astrometric calibration.  Stars brighter than
V=13.5 are saturated and are included only as field identifiers.

A report on our deeper imagery will be posted later.




[GCN EDITOR'S NOTE:  J.Greiner would like the GRB community to know
that due to a recent computer theft incident and subsequent computer
replacements operations, his GRB web site has moved to a new URL:
http://www.aip.de/People/JGreiner/grbgen.html]
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