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GCN Circular 3240

GRB050412: optical limit before and during GRB
2005-04-12T09:14:19Z (19 years ago)
Grzegorz Wrochna at Soltan Inst.for Nuclear Studies <>
M.Cwiok, K.Krupska, K.Kwiecinska, L.Mankiewicz, K.Nawrocki,
B.Pilecki, L.W.Piotrowski, M.Sokolowski, D.Szczygiel, G.Wrochna,
on behalf of "Pi of the Sky" collaboration

The GRB 050412 (GCN 3237) error box was observed by "Pi of the Sky"
apparatus at Las Campanas Observatory for most of the night.
No new object has been found within the Swift-BAT error box
before, during or after the GRB. The limiting magnitude
on single exposures (10s) and sums of 20 images is 11m and 11.5m
respectively (unfiltered).
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