GCN Circular 2580
Subject
GRB040422: optical observations at CrAO
Date
2004-04-25T13:10:40Z (20 years ago)
From
Vasilij Rumjantsev at CrAO <rum@crao.crimea.ua>
V.Rumyantsev (CrAO) and A.Pozanenko (IKI) report:
We have observed the error box of GRB 040422 (INTEGRAL trigger 1758,
GCN2572, Mereghetti et. al) with 2.6 m Shajn telescope (F/3.9) at Crimean
Astrophysical Observatory. The observation start (UT) Apr. 22, 23:37 under
poor sky conditions (seeing ~2.5 arcsec).
Several R-images taken between (UT) Apr. 22, 23:37 - Apr. 23, 01:39 with
exposition 120 s of each frame covered 60% of the GRB error box. Comparison
with DSS2 reveals no new objects brighter than limits of DSS2. The limiting
magnitude of co-added images is ~21R.
Combined mosaic image of GRB error box can be found at
http://grb.rssi.ru/GRB040422
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