[vsnet-grb-info 20322] Swift trigger 810300: MASTER-OAFA robotic report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  22418
SUBJECT: Swift trigger 810300: MASTER-OAFA robotic report 
DATE:    18/02/16 09:46:38 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, O.Ershova, N.Tyurina,  V.Kornilov, D.Zimnukhov, 
A.Krylov, I.Gorbunov, P.Balanutsa, A.Kuznetsov, V.Chazov, D. Kuvshinov
(Lomonosov Moscow State University, SAI),

V.Yurkov, A.Gabovich, Yu.Sergienko
(Blagoveschensk Educational State University, Blagoveschensk),

R.Podesta, C.Lopez, F. Podesta
(Observatorio Astronomico Felix Aguilar (OAFA),National University of San Juan, Argentina),

H. Levato, C. Saffe
(Instituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE), San Juan, Argentina),

D.Buckley, S. Potter
(South African Astronomical Observatory),

R. Rebolo, M. Serra
(The Instituto de Astrofisica de Canarias),

O.Gres,  N.M.Budnev, Yu.Ishmuhametova
(Irkutsk State University),

A. Tlatov, V.Senik, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory)

MASTER-OAFA  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in Argentina was pointed to the Swift trigger 810300 (Barthelmy et 
al. GCN #22416) 23 sec after notice time  and 1742 sec after trigger time
(18/02/16 05:37:23.51UT) at 2018-02-16 06:06:26 UT with unfiltered 
mlim=19.1 (5-sigma) on single images, 19.9m on sum(1800s).

There is marginally seen optical source, possibly known 2MASS source
in 1.3" (with known J-K=1)  from  SWIFT XRT (D'Avanzo et al. GCN #22417) 
center
RA  (J2000.0) =  16 58 12.58
DEC (J2000.0) =  -42 41 55.7
inside 3.83 arcsec error-box (radius, 90% containment).

The message may be cited.


====================================================================
The observations were made on zenit distance = 66 degrees, galaxy latitude 
b = -1 degree.
The Moon altitude is  -44 degree .
The Sun  altitude  is -42.2 degree.
The object can be observed till sunrise at 2018-02-16 10:15:34