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GCN Circular 36434

Subject
Fermi trigger No 737105243: Global MASTER-Net observations report
Date
2024-05-12T00:02:18Z (2 months ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik,  D. Vlasenko,
G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij
(Lomonosov Moscow State University, SAI, Physics Department),

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

R. Rebolo, M. Serra
(The Instituto de Astrofisica de Canarias),

D. Buckley
(South African Astronomical Observatory),

O.A. Gress, N.M. Budnev, O.Ershova
(Irkutsk State University, API),

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez
(INAOE, Guillermo Haro Astrophysics Observatory),

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

V. Yurkov, A. Gabovich
(Blagoveschensk Educational State University)

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 GRB240511.31 (trigger No 737105243,00h 20m 00.00s , -58d 33m 00.0s, R=1.92) errorbox  58761 sec after notice time and 58793 sec after trigger time at 2024-05-11 23:47:12 UT, with upper limit up to  18.8 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -68.6 deg. 

The galactic latitude b = -58 deg., longitude l = 310 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2451629

We obtain a following upper limits.  

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

   58824 | 2024-05-11 23:47:12 |         MASTER-SAAO | (00h 20m 21.22s , -57d 58m 05.6s) |   C |    60 | 18.3 |        
   58824 | 2024-05-11 23:47:12 |         MASTER-SAAO | (00h 16m 56.57s , -57d 44m 31.9s) |   C |    60 | 18.4 |        
   58903 | 2024-05-11 23:48:31 |         MASTER-SAAO | (00h 35m 23.80s , -57d 59m 29.9s) |   C |    60 | 18.1 |        
   58903 | 2024-05-11 23:48:31 |         MASTER-SAAO | (00h 31m 59.27s , -57d 45m 54.8s) |   C |    60 | 18.4 |        
   58983 | 2024-05-11 23:49:51 |         MASTER-SAAO | (00h 21m 35.87s , -59d 52m 56.6s) |   C |    60 | 18.3 |        
   58983 | 2024-05-11 23:49:51 |         MASTER-SAAO | (00h 17m 59.52s , -59d 39m 21.4s) |   C |    60 | 18.7 |        
   59062 | 2024-05-11 23:51:11 |         MASTER-SAAO | (00h 37m 27.89s , -59d 51m 28.8s) |   C |    60 | 18.5 |        
   59062 | 2024-05-11 23:51:11 |         MASTER-SAAO | (00h 33m 51.92s , -59d 37m 53.6s) |   C |    60 | 18.6 |        
   59301 | 2024-05-11 23:55:10 |         MASTER-SAAO | (23h 51m 25.31s , -59d 53m 03.2s) |   C |    60 | 18.8 |        
   59381 | 2024-05-11 23:56:29 |         MASTER-SAAO | (00h 07m 19.12s , -59d 54m 25.6s) |   C |    60 | 18.7 |        
   59381 | 2024-05-11 23:56:29 |         MASTER-SAAO | (00h 03m 42.47s , -59d 40m 52.3s) |   C |    60 | 18.8 |        
Filter C is a clear (unfiltred) band. 


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