GCN Circular 11542

E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina,
D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov,
D.Zimnukhov, M. Kornilov
Sternberg Astronomical Institute, Moscow State University

V.Krushinski, I.Zalozhnich, A. Popov
Ural State University, Kourovka

K.Ivanov, O.Chuvalaev, V.Poleschuk, E.Konstantinov, V.Lenok, O.Gres,
S.Yazev, N.M.Budnev,
Irkutsk State University

A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory

V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina
Blagoveschensk Educational State University, Blagoveschensk

MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in 
Kislovodsk was pointed to the  GRB110106A (Mangano et al., GCN Circ 1152) 17 
sec s after notice time and 41 sec after GRB time at 2011-01-06 15:25:57.96 UT 
in two polarizations+filter R (Gorbovskoy et al., GCN Circ 11523).

We marginally see OT about 16.0+-0.5  mag in XRT error box on second set 
at 2011-01-06 15:26:19 (starting 69 s after trigger time with 10 sec 
exposition, Gorbovskoy et al., GCN Circ 11523).

The OT positon:
RA=  05 17 13.98
DEC= 64 10 23.5
the error +-4" and coincident with late OT  TNG position (Malesani 
et al., GCN Circ 11524).

GRB trigger time: 15:25:16

Time UT             T-T_trigger    Exp         Filter         Mag

15:25:57               41           10           Cr           >16,1
15:26:19               63           10           R+P        16,0+-0.5
15:26:40               84           20           R+P          >16,6
15:27:11               115          20           R+P          >16,6
15:27:42               146          30           R+P          >17,0
15:28:23               187          40           R+P          >17,2
15:29:14               238          50           R+P          >17,4
15:30:15               299          60           R+P          >17,5
15:31:26               370          70           R+P          >17,7
15:32:47               451          90           R+P          >17,9
15:34:28               552         110           R+P          >18,0
15:36:29               673         130           R+P          >18,1
15:38:51               815         160           R+P          >18,3
15:41:42               986         180           R+P          >18,3
15:44:53              1177         180           R+P          >18,4

The more detailed data are available at 
http://observ.pereplet.ru/images/GRB110106A/grb.html

We see the  galaxy  near  (~8" distance, in our prevous Circ 
11523 we not include the binning CCD scale = 4"/pix) OT  on later images 
with long exposition. The redshift z=0.093 (Piranomonte et al., GCN Circ 
1130) is typical for short bursts.

The origin of the GRB110106A is no connected with massive star core 
collapse because  long distance  from center of the host galaxy 
(independently  of the host galaxy type!).  The 
origin of the GRB connected with the NS+NS  or NS+BH merging
(Lipunov et al.,1995, "Evolution of the Double Neutron Star Merging Rate 
and the Cosmological Origin of Gamma-Ray Burst Sources", Astrophysical Journal 
v.454, p.593.; Lipunov, 1997, Relativistic 
Binary Merging Rates, The Invited Review on Joint Discussion "High 
Energy Transients" on XXIIIrd General Assembly of IAU, Kioto, 1997, 
http://adsabs.harvard.edu/abs/1997astro.ph.11270L).

The message may be cited.

mailto: lipunov@sai.msu.ru