TITLE:   GCN CIRCULAR
NUMBER:  23885
SUBJECT: GRB190211A: MASTER Global Robotic Net optical observation 
DATE:    19/02/11 18:21:54 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, N.Tyurina, V.Kornilov, D.Vlasenko, V.Vladimirov, D.Zimnukhov,
A.Kuznetsov, P.Balanutsa, A. Chasovnikov, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department),

O. Gress, N.M. Budnev, O.Ershova, Yu.Ishmuhametova (Applied Physics Institute, Irkutsk State University),

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

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias),

D. Buckley (South African Astronomical Observatory),

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

R. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA),

H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE)

MASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, v.2010, 30L)
  located in Russia (Blagoveshchensk State Pedagogical University)
was pointed to the  GRB190211A (Marshall et al. GCN 23883)
8 sec after notice time (46 sec after trigger time) at 2019-02-11 16:55:30 UT.

On our first (10s exposure)  set there is no  optical transient  within SWIFT 
error-box (ra=196.675 dec=41.9658 r=0.05) with 16.4m (5-sigma) upper limit 
(NEXT-0.6,  Xu et al. GCN 23884 with RA,Dec=13:06:38.47 +41:58:04.93).

The galactic latitude b = 75 deg., longitude l = 110 deg.
The observations started when error box altitude was 65 deg.
The moon (38 % bright part) altitude was -14 deg.
The sun  altitude was -50.9 deg.


MASTER-Tunka robotic telescope located in Russia (Applied Physics Institute, Irkutsk State University)
was pointed to the  GRB190211A 38 sec after notice time (76 sec after triggertime)
at 2019-02-11 16:56:00 UT.

On our first (10s exposure)  set we didn't find optical transient  within SWIFT 
error-box with  5-sigma upper limit 16.4m

The observations started when error-box altitde was  50 deg.
The sun  altitude  was -51.9 deg.


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