GCN Circular 617
Subject
GRB 000307 optical observations
Date
2000-03-26T11:39:58Z (25 years ago)
From
Holger Pedersen at Copenhagen U Obs <holger@astro.ku.dk>
H. Pedersen, B. L. Jensen (University of Copenhagen),
J. Gorosabel (Danish Space Research Institute, Copenhagen),
J. P. U. Fynbo (Aarhus University) report on behalf of
a wider, European group:
We have observed the entire error box of GRB 000307
(cf. Hurley et al., GCN #601), using the WFI instrument
attached to the 2.2-m ESO/MPI telescope at La Silla.
The exposure dates were:
2000 March 10.015 UT, 2 * 600 s R-band, seeing 0.9" - 1.2"
2000 March 23.019 UT, 3 * 600 s R-band, seeing 1.1" - 1.6"
The two exposure sets were compared, using image blinking.
The closeness of Betelgeuse implies scattered light across
the error box, and hence a non-uniform limiting magnitude.
Using the standard stars provided by Henden et al. (GCN #608)
we estimate that most of the error box has been searched to
magnitude R ~22.0.
No candidate counterpart was found.
We acknowledge the assistance of the La Silla staff.
Observations were carried out at the European Southern
Observatory under programme 64.H-0573(A).