[vsnet-grb-info 21850] GRB190311A: MASTER Global Robotic Net OT optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23949
SUBJECT: GRB190311A: MASTER Global Robotic Net OT optical observation 
DATE:    19/03/11 16:18:57 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

E. Gorbovskoy, 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-Tunka robotic telescope (Global MASTER-Net: 
http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, 
vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk 
State University) was pointed to the  GRB190311.6 (Troja et al., 
23946) 55 sec after notice time 
and 66 sec after trigger time at 2019-03-11 14:24:45 UT. On our third (30 
s  exposure)  set we  found optical transient  within SWIFT 
error-box at Swift UVOT position (Troja et al., 23946).

m ~ 17.5
RA, DEC = 14:08:15.72, +53:30:02.9
err = 1 arcsec

We obtain a following images with OT:

Tmid-T0  |          Site       |Filt.| Expt. | Limit | Comment
_________|_____________________|_____|_______|_______|________

      109 |        MASTER-Tunka |  P- |    10 | 16.82 |
      109 |        MASTER-Tunka |  P- |    80 | 18.47 |  Coadd
      109 |        MASTER-Tunka |  P| |    10 | 16.69 |
      109 |        MASTER-Tunka |  P| |    80 | 18.33 |  Coadd
      231 |        MASTER-Tunka |  P| |    30 | 17.60 |
      231 |        MASTER-Tunka |  P- |    30 | 17.74 |
      338 |        MASTER-Tunka |  P| |    40 | 17.70 |
      338 |        MASTER-Tunka |  P- |    40 | 17.87 |
      462 |         MASTER-Amur |  P/ |    60 | 13.12 |
      465 |        MASTER-Tunka |  P| |    60 | 18.12 |
      465 |        MASTER-Tunka |  P| |   250 | 19.14 |  Coadd
      465 |        MASTER-Tunka |  P- |    60 | 18.21 |
      465 |        MASTER-Tunka |  P- |   250 | 19.24 |  Coadd
      593 |         MASTER-Amur |  P/ |    60 | 12.20 |
      614 |        MASTER-Tunka |  P| |    80 | 18.50 |
      614 |        MASTER-Tunka |  P- |    80 | 18.43 |
      808 |        MASTER-Tunka |  P| |   110 | 18.65 |
      808 |        MASTER-Tunka |  P- |   110 | 18.65 |
     1032 |        MASTER-Tunka |  P| |   140 | 18.56 |
     1032 |        MASTER-Tunka |  P| |   490 | 19.35 |  Coadd
     1032 |        MASTER-Tunka |  P- |   140 | 18.55 |
     1032 |        MASTER-Tunka |  P- |   490 | 19.30 |  Coadd
     1305 |        MASTER-Tunka |  P| |   170 | 18.64 |
     1305 |        MASTER-Tunka |  P- |   170 | 18.63 |
     1622 |        MASTER-Tunka |  P| |   180 | 19.02 |
     1623 |        MASTER-Tunka |  P- |   180 | 18.89 |
     1949 |        MASTER-Tunka |  P| |   180 | 17.67 |
     1949 |        MASTER-Tunka |  P| |   540 | 19.26 |  Coadd
     1949 |        MASTER-Tunka |  P- |   180 | 17.63 |
     1949 |        MASTER-Tunka |  P- |   540 | 19.22 |  Coadd
     2284 |        MASTER-Tunka |  P| |   180 | 18.90 |
     2284 |        MASTER-Tunka |  P- |   180 | 18.98 |
     2616 |        MASTER-Tunka |  P| |   180 | 19.01 |
     2949 |        MASTER-Tunka |  P| |   180 | 19.10 |
     2949 |        MASTER-Tunka |  P| |   540 | 19.83 |  Coadd
     2949 |        MASTER-Tunka |  P- |   540 | 19.72 |  Coadd
     3959 |        MASTER-Tunka |  P- |   540 | 19.60 |  Coadd
     3959 |        MASTER-Tunka |  P| |   540 | 19.87 |  Coadd
     5650 |        MASTER-Tunka |  P| |   180 | 19.20 |
     5650 |        MASTER-Tunka |  P- |   180 | 18.89 |
     5979 |        MASTER-Tunka |  P- |   180 | 18.74 |
     5979 |        MASTER-Tunka |  P| |   180 | 19.02 |
     6312 |        MASTER-Tunka |  P| |   180 | 18.66 |
     6312 |        MASTER-Tunka |  P- |   180 | 18.79 |


The 5-sigma upper limit has been about 16.32mag
The message may be cited.


====================================================================


The galactic latitude b = 60 deg., longitude l = 99 deg.
The observations made on zenit distance = 48 deg.The moon (22 % bright 
part) is 14 deg. above the horizon. The distance between  moon and  object 
is 113
The sun  altitude  is -30.2 deg.
The object can be observed till sunrise at 2019-03-12 23:26:58.


This message can be cited.