MASTER OT 123412-632503 detection during Swift trigger 518853
ATel #4007; E. Gorbovskoy, V. Lipunov, P. Balanutsa, N. Tiurina, V. Kornilov, A. Belinski, N. Shatskiy, V. Chazov, A. Kuznetsov, D. Zimnukhov. D. Kuvshinov (Moscow Lomonosov State University, SAI), Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest, Observatorio Astronomico Felix Aguilar (OAFA), V. Krushinsky, I. Zalozhnih, A. Popov (Ural Federal University) K. Ivanov, S. Yazev, N. Budnev, E. Konstantinov, O. Chuvalaev, V. Poleshchuk, O. Gress (Irkutsk State University) A. Parkhomenko, A. Tlatov, D. Dormidontov, V. Senik (Kislovodsk solar station of the Pulkovo observatory RAS) V. Yurkov, Y. Sergienko, D. Varda, E. Sinyakov (Blagoveshchensk Educational University), S. Shurpakov (MASTER team members),
on 29 Mar 2012; 13:20 UT
Credential Certification: Vladimir Lipunov (lipunov2007@gmail.com)
Subjects: Optical, Gamma Ray, Cosmic Rays, Gamma-Ray Burst, Transient
MASTER-ICATE robotic Very Wide Field Camera ( http://93.180.27.230:8080/ ) located
in Argentina was pointed to the area of the Trigger 518853 (Barthelmy et
al., GCN Circ 13166 http://gcn.gsfc.nasa.gov/gcn3/13166.gcn3 ) several minutes before
notice time (due to Swift pointing info) and 12.9 min after GRB
time at 2012-03-29 02:34:16.391.
We find OT with Mag = 13.2 (unfiltered red CCD) at
Ra=188.552513 Dec=-63.417673
Ra=12:34:12.6 Dec=-63:25:03
with 25" sec 3-sigma error box.
There is 2MASS nonstar object 12340720-6325129 with 1.2 arcsec offset.
That is inside XRT error box.
The absence OT in UVOT data may be connected with very high reddening of
the source by Galactic extinction and distinction in time observations.
The follow up IR observations are requied to chose between CR or
High Energy Transient nature (Evans and Osborne, GCN Circ 13167 http://gcn.gsfc.nasa.gov/gcn3/13167.gcn3 ) of the
event.
Global MASTER Robotic Net