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GCN Circular 11184

GRB 100901A: ISON-NM optical observations
2010-09-02T20:41:25Z (14 years ago)
Leonid Elenin at ISON <>
L. Elenin, I. Molotov (ISON), A. Pozanenko (IKI) report on behalf of larger
GRB  follow-up collaboration:

We observed the field of the Swift GRB 100901A (Immler et al. GCN Circ.
with 0.45-m telescope of ISON-NM observatory on Sep. 02 (UT) 09:55:53 -

The afterglow (Immler et al., GCN 11159; Guidorzi et al., GCN 11160; Ivanov
et al., GCN 11161;
Klunko et al., GCN 11162)  is well detected. For the preliminary photometry
of unfiltered image
we used USNO-B1.01127-0027229 field stars, assuming R=16.16:

T-T0      filter   exposure   mag.  mag. error

0.8561    W      20x60     17.82    +/- 0.03

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