GCN Circular 9681
Subject
GRB 090715B: MASTER optical limit
Date
2009-07-16T13:32:17Z (15 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
D.Kuvshinov, V. Lipunov, V.Kornilov, E. Gorbovskoy,
A.Belinski, A. Krylov, N.Shatskiy, N.Tyurina, P.Balanutsa, V.V.Chazov,
P.V.Kortunov
Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.V. Parkhomenko,
Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalognikh, T.Kopytova, Alexander Popov
Ural State University, Kourovka
S.Yazev, K.Ivanov
Irkutsk State University
MASTER robotic telescope (MASTER-Net: http://observ.pereplet.ru,
355 mm, 6 square degrees, 16Mpx Apogee CCD) located
at Vostrykovo (Moscow) responded to the GRB 090715B (Swift
trigger 357512, L. Vetere , GCN 9668), producing images
beginning 19 s after the GCN notice time. An automated response took
the first image at 21:11:18 UT, 8m 04s after the burst, under summer
Moscow sky.
We have 160 images with 30 sec exposition each.
These unfiltered images are calibrated relative to USNO 08.R+0.2B (Usno
A2.0).
Individual images have limiting magnitudes ranging from 17.8-17.0; we
set the following specific limits.
GRB_time start UT end UT t_exp(s) mlim Coadd?
-------------------------------------------------------------------
484 - 514s 21:11:18 21:41:18 30 17.8 no
484 - 699s 21:11:18 21:14:57 90 18.5 3
484 - 6699S 21:11:18 22:54:27 3330 20.0 111
Robot do not detect OT with limit 20.0 .
The message may be cited.
mailto: lipunov@sai.msu.ru