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GCN Circular 24877

Swift trigger 911102: D50 optical limit
2019-06-24T21:25:10Z (5 years ago)
Martin Jelinek at Astro.Inst-AVCR,Ondrejov <>
Martin Jelinek, Jan Strobl (ASU CAS Ondrejov, CZ)

The 50 cm robotic telescope (D50) of Ondrejov
observatory in the Czech republic reacted robotically to
the Swift trigger n. 911102 (Cenko et al, GCNC 24876),
obtaining a series of 10 s unfiltered images starting at
20:42:42UT, i.e. 122 s post trigger.

We do not detect any new source in comparison to
USNO-B1.0 catalog neither in single images (3-sigma limit
R>~16.6) nor in a combined 18x10s frame (mean exp time
218 s post trigger, 3-sigma limit R>~18.2).
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