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GCN Circular 24135

Subject
Fermi GRB190419.41 Global MASTER-Net observations report
Date
2019-04-20T00:31:30Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@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) started inspect of the Fermi GRB190419.41 (  6h 54m 04.80s , -41d 44m 24.00s, R=2.28) errorbox  38347 sec after trigger time at 2019-04-19 20:34:45 UT, with upper limit up to  17.2 mag. Observations started at twilight.  The observations began at zenit distance = 78 deg. The sun  altitude  is -14.4 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB190419.41 errorbox  46746 sec after trigger time at 2019-04-19 22:54:43 UT, with upper limit up to  18.0 mag. Observations started at twilight.  The observations began at zenit distance = 19 deg. The sun  altitude  is -10.1 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=999842

We obtain a following upper limits.  

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

   38378 | 2019-04-19 20:34:45 |          MASTER-IAC | (  7h  0m 19.65s , -37d 55m 50.55s) |   C |    60 | 17.2 |        
   38496 | 2019-04-19 20:36:43 |          MASTER-IAC | (  7h 12m 27.19s , -39d 55m 29.19s) |   C |    60 | 17.0 |        
   39165 | 2019-04-19 20:47:52 |          MASTER-IAC | (  7h  0m 20.07s , -37d 55m 58.45s) |   C |    60 | 17.1 |        
   39271 | 2019-04-19 20:49:38 |          MASTER-IAC | (  7h 12m 26.25s , -39d 55m 16.39s) |   C |    60 | 17.0 |        
   46776 | 2019-04-19 22:54:43 |         MASTER-OAFA | (  6h 42m 50.48s , -41d 57m 52.47s) |   C |    60 | 16.9 |        
   46930 | 2019-04-19 22:57:17 |         MASTER-OAFA | (  6h 51m 36.62s , -39d 58m 01.36s) |   C |    60 | 17.0 |        
   47320 | 2019-04-19 23:03:47 |         MASTER-OAFA | (  6h 42m 50.16s , -41d 57m 51.10s) |   C |    60 | 17.5 |        
   47424 | 2019-04-19 23:05:32 |         MASTER-OAFA | (  6h 53m 34.58s , -41d 57m 32.96s) |   C |    60 | 17.6 |        
   47534 | 2019-04-19 23:07:21 |         MASTER-OAFA | (  6h 51m 36.39s , -39d 58m 00.71s) |   C |    60 | 17.7 |        
   47645 | 2019-04-19 23:09:13 |         MASTER-OAFA | (  7h  2m 03.82s , -39d 57m 42.54s) |   C |    60 | 17.7 |        
   47751 | 2019-04-19 23:10:58 |         MASTER-OAFA | (  6h 53m 38.57s , -41d 56m 57.57s) |   C |    60 | 17.8 |        
   47859 | 2019-04-19 23:12:46 |         MASTER-OAFA | (  6h 56m 14.21s , -43d 57m 11.85s) |   C |    60 | 17.8 |        
   47966 | 2019-04-19 23:14:34 |         MASTER-OAFA | (  7h  2m 06.54s , -39d 57m 05.77s) |   C |    60 | 17.9 |        
   48312 | 2019-04-19 23:20:20 |         MASTER-OAFA | (  6h 56m 14.21s , -43d 56m 47.01s) |   C |    60 | 17.9 |        
   48422 | 2019-04-19 23:22:10 |         MASTER-OAFA | (  7h  7m 20.97s , -43d 56m 49.51s) |   C |    60 | 17.8 |        
   48534 | 2019-04-19 23:24:01 |         MASTER-OAFA | (  7h  4m 24.15s , -41d 56m 38.58s) |   C |    60 | 17.9 |        
   48749 | 2019-04-19 23:27:36 |         MASTER-OAFA | (  7h  7m 22.43s , -43d 56m 53.15s) |   C |    60 | 17.9 |        
   48860 | 2019-04-19 23:29:27 |         MASTER-OAFA | (  7h  4m 24.16s , -41d 56m 40.84s) |   C |    60 | 17.9 |        
   48972 | 2019-04-19 23:31:19 |         MASTER-OAFA | (  7h 15m 08.56s , -41d 56m 21.42s) |   C |    60 | 17.7 |        
   49415 | 2019-04-19 23:38:42 |         MASTER-OAFA | (  6h 45m 08.81s , -43d 57m 15.90s) |   C |    60 | 18.0 |        
   49521 | 2019-04-19 23:40:28 |         MASTER-OAFA | (  7h 15m 08.38s , -41d 56m 25.07s) |   C |    60 | 17.6 |        
   49736 | 2019-04-19 23:44:03 |         MASTER-OAFA | (  6h 45m 09.06s , -43d 57m 19.26s) |   C |    60 | 17.9 |        
   50052 | 2019-04-19 23:49:20 |         MASTER-OAFA | (  6h 41m 14.61s , -39d 57m 32.15s) |   C |    60 | 17.8 |        
   50261 | 2019-04-19 23:52:48 |         MASTER-OAFA | (  6h 50m 17.04s , -37d 57m 38.10s) |   C |    60 | 17.7 |        
   50365 | 2019-04-19 23:54:32 |         MASTER-OAFA | (  6h 41m 14.56s , -39d 57m 53.67s) |   C |    60 | 17.7 |        
   50576 | 2019-04-19 23:58:03 |         MASTER-OAFA | (  6h 50m 17.15s , -37d 57m 38.81s) |   C |    60 | 17.6 |        
   50687 | 2019-04-19 23:59:54 |         MASTER-OAFA | (  7h  0m 27.48s , -37d 57m 00.24s) |   C |    60 | 17.7 |        
   51009 | 2019-04-20 00:05:16 |         MASTER-OAFA | (  7h  0m 27.58s , -37d 57m 19.94s) |   C |    60 | 17.8 |        
   52065 | 2019-04-20 00:22:53 |         MASTER-OAFA | (  7h 12m 34.25s , -39d 56m 52.88s) |   C |    60 | 17.5 |        
Filter C is a clear (unfiltred) band. 


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