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GCN Circular 36678

Subject
Fermi GRB 240616A: Global MASTER-Net observations report
Date
2024-06-16T17:16:59Z (21 days 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 GRB 240616A ( Fermi GBM team, GCN 36674Not found
 
 
) errorbox  39447 sec after notice time and 39481 sec after trigger time at 2024-06-16 16:34:44 UT, with upper limit up to  18.5 mag. Observations started at twilight.  The observations began at zenith distance = 51 deg. The sun  altitude  is -11.2 deg. 

The galactic latitude b = 51 deg., longitude l = 213 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2495600

We obtain a following upper limits.  

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

   39512 | 2024-06-16 16:34:44 |         MASTER-SAAO | (10h 07m 38.14s , +14d 25m 52.7s) |   C |    60 | 17.1 |        
   39591 | 2024-06-16 16:36:04 |         MASTER-SAAO | (10h 15m 57.89s , +14d 27m 06.0s) |   C |    60 | 17.1 |        
   40269 | 2024-06-16 16:47:21 |         MASTER-SAAO | (10h 02m 51.22s , +12d 32m 22.2s) |   C |    60 | 18.0 |        
   40348 | 2024-06-16 16:48:40 |         MASTER-SAAO | (10h 10m 59.73s , +12d 33m 38.0s) |   C |    60 | 17.9 |        
   40427 | 2024-06-16 16:50:00 |         MASTER-SAAO | (10h 07m 37.46s , +14d 26m 33.8s) |   C |    60 | 18.1 |        
   40506 | 2024-06-16 16:51:19 |         MASTER-SAAO | (10h 15m 56.30s , +14d 27m 36.4s) |   C |    60 | 18.0 |        
   40586 | 2024-06-16 16:52:38 |         MASTER-SAAO | (09h 57m 17.57s , +16d 22m 29.7s) |   C |    60 | 17.8 |        
   40665 | 2024-06-16 16:53:57 |         MASTER-SAAO | (10h 05m 44.32s , +16d 21m 24.0s) |   C |    60 | 18.1 |        
   40744 | 2024-06-16 16:55:17 |         MASTER-SAAO | (09h 51m 56.39s , +14d 27m 02.0s) |   C |    60 | 18.3 |        
   40823 | 2024-06-16 16:56:36 |         MASTER-SAAO | (10h 00m 09.47s , +14d 28m 14.4s) |   C |    60 | 18.4 |        
   40903 | 2024-06-16 16:57:55 |         MASTER-SAAO | (09h 58m 42.36s , +10d 40m 19.6s) |   C |    60 | 18.1 |        
   40982 | 2024-06-16 16:59:14 |         MASTER-SAAO | (10h 06m 45.09s , +10d 39m 25.6s) |   C |    60 | 18.1 |        
   41061 | 2024-06-16 17:00:34 |         MASTER-SAAO | (09h 47m 11.41s , +12d 33m 54.0s) |   C |    60 | 18.1 |        
   41142 | 2024-06-16 17:01:54 |         MASTER-SAAO | (09h 55m 17.95s , +12d 32m 48.5s) |   C |    60 | 18.2 |        
   41221 | 2024-06-16 17:03:14 |         MASTER-SAAO | (10h 02m 48.15s , +12d 33m 01.2s) |   C |    60 | 18.3 |        
   41300 | 2024-06-16 17:04:33 |         MASTER-SAAO | (10h 10m 57.83s , +12d 34m 35.7s) |   C |    60 | 18.5 |        
   41379 | 2024-06-16 17:05:52 |         MASTER-SAAO | (10h 07m 35.47s , +14d 27m 07.6s) |   C |    60 | 18.2 |        
   41459 | 2024-06-16 17:07:12 |         MASTER-SAAO | (10h 15m 54.79s , +14d 28m 22.8s) |   C |    60 | 18.2 |        
   41538 | 2024-06-16 17:08:31 |         MASTER-SAAO | (09h 57m 15.61s , +16d 22m 07.7s) |   C |    60 | 17.9 |        
   41618 | 2024-06-16 17:09:50 |         MASTER-SAAO | (10h 05m 37.01s , +16d 23m 00.9s) |   C |    60 | 18.0 |        
   41697 | 2024-06-16 17:11:09 |         MASTER-SAAO | (09h 51m 52.59s , +14d 28m 16.4s) |   C |    60 | 18.1 |        
   41776 | 2024-06-16 17:12:29 |         MASTER-SAAO | (10h 00m 03.96s , +14d 27m 10.5s) |   C |    60 | 18.4 |        
Filter C is a clear (unfiltred) band. 


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