[vsnet-grb-info 22329] Fermi GRB190508.81 Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  24428
SUBJECT: Fermi GRB190508.81 Global MASTER-Net observations report 
DATE:    19/05/08 20:01:24 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-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB190508.81 (trigger No 579036175, 11h 51m 50.40s , +23d 31m 48.00s, R=2.12) errorbox  151 sec after trigger time at 2019-05-08 19:25:21 UT, with upper limit up to  17.2 mag. The observations began at zenit distance = 56 deg. The sun  altitude  is -44.7 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB190508.81 errorbox  583 sec after trigger time at 2019-05-08 19:32:34 UT, with upper limit up to  19.1 mag. The observations began at zenit distance = 27 deg. The sun  altitude  is -26.1 deg. 

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


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1012657

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

     166 | 2019-05-08 19:25:21 |         MASTER-SAAO | ( 11h 50m 45.97s , +26d  6m 18.86s) |   C |    30 | 14.3 |        
     216 | 2019-05-08 19:25:21 |         MASTER-SAAO | ( 11h 50m 45.96s , +26d  6m 18.88s) |   C |   130 | 15.6 |  Coadd 
     231 | 2019-05-08 19:26:21 |         MASTER-SAAO | ( 11h 50m 45.90s , +26d  6m 18.87s) |   C |    40 | 14.9 |        
     311 | 2019-05-08 19:27:31 |         MASTER-SAAO | ( 11h 50m 45.83s , +26d  6m 18.98s) |   C |    60 | 15.3 |        
     407 | 2019-05-08 19:29:01 |         MASTER-SAAO | ( 11h 50m 45.76s , +26d  6m 18.67s) |   C |    70 | 17.3 |        
     644 | 2019-05-08 19:32:34 |   MASTER-Kislovodsk | ( 11h 56m 28.05s , +23d 33m 45.38s) |   C |   120 | 18.8 |        
     644 | 2019-05-08 19:32:34 |   MASTER-Kislovodsk | ( 11h 47m 19.94s , +24d  0m 20.14s) |   C |   120 | 18.5 |        
     803 | 2019-05-08 19:34:58 |   MASTER-Kislovodsk | ( 11h 56m 27.92s , +23d 33m 38.82s) |   C |   150 | 19.1 |        
     803 | 2019-05-08 19:34:58 |   MASTER-Kislovodsk | ( 11h 47m 19.98s , +24d  0m 11.85s) |   C |   150 | 19.0 |        
    1355 | 2019-05-08 19:44:55 |   MASTER-Kislovodsk | ( 12h  2m 44.46s , +24d  2m 04.36s) |   C |    60 | 18.9 |        
    1460 | 2019-05-08 19:46:40 |   MASTER-Kislovodsk | ( 11h 52m 05.96s , +22d  1m 55.45s) |   C |    60 | 18.3 |        
    1460 | 2019-05-08 19:46:40 |   MASTER-Kislovodsk | ( 11h 43m 05.32s , +22d 28m 15.35s) |   C |    60 | 18.4 |        
Filter C is a clear (unfiltred) band. 


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