[vsnet-grb-info 14445] GRB 140122A/Fermi412093190: MASTER-Net early optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Jan 24 22:14:28 JST 2014
TITLE: GCN CIRCULAR
NUMBER: 15759
SUBJECT: GRB 140122A/Fermi412093190: MASTER-Net early optical observations
DATE: 14/01/24 13:12:16 GMT
FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc at observ.inetcomm.ru>
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina,
N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov,
D.Denisenko, A.Sankovich
Sternberg Astronomical Institute, Moscow State University
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
V.Krushinski, I.Zalozhnih, A. Popov
Ural Federal University, Kourovka
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
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)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Blagoveschensk was pointed to the GRB140122A (Fermi trigger
412093190) 23 sec after notice time and 50 sec after trigger time at
2014-01-22 14:20:37.228 UT. On our first (10s exposure) set we haven`t
found optical transient within 2 sq. degree part in middle part of FERMI
error-box (ra=03 36 07 dec=+15 27 00 r=5.26) with 5-sigma upper limit has
been about 15.5 mag on first single image and 17.0m on coadd image of
first 6 sets with total exposure 230 sec. So small covered area due to
observations in polaroid bands, which cover only 25% of our FOV.
The coordinates of the MASTER II image centers (2.1 degrees rectangle):
03h 37m 16.9s +15d 34m 55s
03h 34m 11.7s +15d 25m 53s
Also we cover 95% of 1-sigma statistical + systematic FERMI errorbox
using MASTER VWF robotic very wide field cameras (FOV=2x384 square
degrees, D=72mm, f/1.4, 1 pix = 22 arcsec, http://observ.pereplet.ru)
installed on MASTER-II robotic telescope in same time. No credible
transients have been found on our images. The 3 sigma upper limit on
single 10 seconds exposure image is 10.5 and 12.0 on coadd of 15 images
with total exposure 150 seconds.
The positions of first two iPTF optical afterglow candidates (Singer et
al., GCN15758 ) are covered by out cameras since 50 sec. after the trigger
but there are no flares up to 12.0 mag. on their place.
The MASTER VWF coverage map available here
http://master.sai.msu.ru/static/GRB/GRB140122A_map.png
The message may be cited.
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