[vsnet-grb-info 21892] SWIFT GRB190323.85 Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23991
SUBJECT: SWIFT GRB190323.85 Global MASTER-Net observations report 
DATE:    19/03/23 21:41:30 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,
A.Kuznetsov, V.V.Chazov, D. Vlasenko
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University

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

K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk
Irkutsk State University

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

R. Podesta, Carlos Lopez and F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA)

Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

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

D. Buckley, S. Potter, A. Kniazev, M. Kotze
South African Astronomical Observatory



MASTER-IAC robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Spain (IAC Teide Observatory) was pointed to the  SWIFT GRB190323.85 (  2h 40m 36.72s , +61d 14m 45.60s, R=0.05) 41 sec after trigger time at 2019-03-23 20:31:28 UT, with upper limit up to  18.5 mag. The observations began at zenit distance = 57 deg. The sun  altitude  is -17.5 deg. 

MASTER-Tunka robotic telescope  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the  SWIFT GRB190323.85 68 sec after trigger time at 2019-03-23 20:31:55 UT, with upper limit up to  16.7 mag. The observations began at zenit distance = 67 deg. The sun  altitude  is -23.2 deg. 

The galactic latitude b = -60 deg., longitude l = 98 deg.

We obtain a following upper limits.  

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

      46 |          MASTER-IAC |  P- |    10 | 16.4 |        
      46 |          MASTER-IAC |  P| |    10 | 16.8 |        
      74 |        MASTER-Tunka |   C |    10 | 12.3 |        
     101 |          MASTER-IAC |  P- |    20 | 17.0 |        
     101 |          MASTER-IAC |  P| |    20 | 17.3 |        
     138 |          MASTER-IAC |  P- |    20 | 17.0 |        
     138 |          MASTER-IAC |  P| |    20 | 17.3 |        
     180 |          MASTER-IAC |  P- |    30 | 17.2 |        
     180 |          MASTER-IAC |  P| |    30 | 17.6 |        
     233 |          MASTER-IAC |  P- |    40 | 17.4 |        
     233 |          MASTER-IAC |  P| |    40 | 17.9 |        
     293 |          MASTER-IAC |  P- |    50 | 17.7 |        
     293 |          MASTER-IAC |  P| |    50 | 18.0 |        
     368 |          MASTER-IAC |  P| |    70 | 18.2 |        
     368 |          MASTER-IAC |  P- |    70 | 17.8 |        
     411 |        MASTER-Tunka |  P| |    70 | 16.4 |        
     458 |          MASTER-IAC |  P- |    80 | 18.0 |        
     458 |          MASTER-IAC |  P| |    80 | 18.4 |        
     563 |          MASTER-IAC |  P- |   100 | 18.0 |        
     563 |          MASTER-IAC |  P| |   100 | 18.5 |        
     567 |        MASTER-Tunka |  P| |   100 | 16.5 |        
    1239 |        MASTER-Tunka |  P| |   180 | 15.5 |        
    1489 |        MASTER-Tunka |  P| |   180 | 15.1 |        
    2272 |        MASTER-Tunka |  P| |   180 | 16.4 |        
    2524 |        MASTER-Tunka |  P| |   180 | 16.7 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.