GCN Circular 12024
Subject
GRB 110520A: Skynet/DAO optical observations
Date
2011-05-20T23:03:37Z (13 years ago)
From
Aaron LaCluyze at U.North Carolina <lacluyze@physics.unc.edu>
A. LaCluyze, M. Maturi, K. Ivarsen, J. Haislip, D. Reichart, J. Moore,
A. Trotter, A. Foster, R.Egger, A. Oza, E. Speckhard, J. A. Crain, and
M. Nysewanderreport:
Skynet observed the Swift/XRT localization of GRB 110520A (Swift
trigger#453747) with the Dolomites Astronomical Observatory located at
the Carlo Magno Hotel Spa Resort in Italy. Due to local twilight,
observations in SDSS g',r',i' and z' did not begin until ~25 minutes
after the trigger.
We do not detect an optical transit within the Swift error circle in any
filter. Our earliest time photometry yields the following 3-sigma
limiting magnitudes: g' 17.8 (mean time of 26.78 minutes after trigger),
r' 19.7 (mean time of 31.32 minutes after trigger, two combined
exposures), i' 18.5 (mean time of 37.10 minutes after trigger, two
combined exposures), z' 17.8 (mean time of 41.95 minutes after trigger)
based on comparison ~6 nearby SDSS sources.
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