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GCN Circular 36448

Subject
Fermi trigger No 737196587: Global MASTER-Net observations report
Date
2024-05-12T17:30:59Z (7 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 GRB240512.37 (trigger No 737196587,03h 03m 19.20s , -65d 13m 48.0s, R=2.62) errorbox  28570 sec after notice time and 28607 sec after trigger time at 2024-05-12 16:46:30 UT, with upper limit up to  19.0 mag. Observations started at twilight.  The observations began at zenith distance = 66 deg. The sun  altitude  is -11.9 deg. 

The galactic latitude b = -47 deg., longitude l = 283 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2453324

We obtain a following upper limits.  

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

   28638 | 2024-05-12 16:46:30 |         MASTER-SAAO | (03h 00m 01.45s , -61d 24m 24.5s) |   C |    60 | 17.2 |        
   28638 | 2024-05-12 16:46:30 |         MASTER-SAAO | (03h 03m 51.71s , -61d 37m 24.2s) |   C |    60 | 16.4 |        
   28717 | 2024-05-12 16:47:50 |         MASTER-SAAO | (03h 16m 43.37s , -61d 25m 12.8s) |   C |    60 | 17.3 |        
   28717 | 2024-05-12 16:47:50 |         MASTER-SAAO | (03h 20m 34.20s , -61d 38m 12.6s) |   C |    60 | 16.7 |        
   28797 | 2024-05-12 16:49:09 |         MASTER-SAAO | (03h 18m 53.80s , -68d 59m 03.8s) |   C |    60 | 18.0 |        
   28797 | 2024-05-12 16:49:09 |         MASTER-SAAO | (03h 24m 02.65s , -69d 12m 03.8s) |   C |    60 | 17.2 |        
   29694 | 2024-05-12 17:04:06 |         MASTER-SAAO | (03h 00m 01.78s , -61d 23m 11.7s) |   C |    60 | 18.4 |        
   29694 | 2024-05-12 17:04:06 |         MASTER-SAAO | (03h 03m 52.56s , -61d 36m 13.4s) |   C |    60 | 17.7 |        
   29773 | 2024-05-12 17:05:26 |         MASTER-SAAO | (03h 16m 47.70s , -61d 24m 45.3s) |   C |    60 | 18.5 |        
   29773 | 2024-05-12 17:05:26 |         MASTER-SAAO | (03h 20m 39.17s , -61d 37m 47.0s) |   C |    60 | 17.9 |        
   29853 | 2024-05-12 17:06:45 |         MASTER-SAAO | (03h 19m 01.50s , -68d 58m 54.6s) |   C |    60 | 19.0 |        
   29853 | 2024-05-12 17:06:45 |         MASTER-SAAO | (03h 24m 11.39s , -69d 11m 56.5s) |   C |    60 | 18.4 |        
   29933 | 2024-05-12 17:08:05 |         MASTER-SAAO | (02h 49m 30.83s , -65d 11m 00.6s) |   C |    60 | 18.7 |        
   29933 | 2024-05-12 17:08:05 |         MASTER-SAAO | (02h 53m 54.46s , -65d 24m 04.8s) |   C |    60 | 18.0 |        
   30012 | 2024-05-12 17:09:25 |         MASTER-SAAO | (03h 08m 44.96s , -65d 11m 44.8s) |   C |    60 | 18.6 |        
   30012 | 2024-05-12 17:09:25 |         MASTER-SAAO | (03h 13m 09.06s , -65d 24m 48.6s) |   C |    60 | 18.1 |        
   30092 | 2024-05-12 17:10:44 |         MASTER-SAAO | (02h 23m 58.17s , -67d 07m 11.0s) |   C |    60 | 18.5 |        
   30092 | 2024-05-12 17:10:44 |         MASTER-SAAO | (02h 28m 42.36s , -67d 20m 17.8s) |   C |    60 | 18.1 |        
   30171 | 2024-05-12 17:12:04 |         MASTER-SAAO | (02h 44m 30.07s , -67d 04m 57.5s) |   C |    60 | 18.5 |        
   30171 | 2024-05-12 17:12:04 |         MASTER-SAAO | (02h 49m 14.36s , -67d 18m 03.4s) |   C |    60 | 18.0 |        
   30585 | 2024-05-12 17:18:57 |         MASTER-SAAO | (02h 38m 12.24s , -63d 18m 55.1s) |   C |    60 | 18.3 |        
   30585 | 2024-05-12 17:18:57 |         MASTER-SAAO | (02h 42m 18.82s , -63d 32m 02.0s) |   C |    60 | 18.0 |        
   30665 | 2024-05-12 17:20:17 |         MASTER-SAAO | (02h 55m 59.63s , -63d 17m 07.8s) |   C |    60 | 18.6 |        
   30665 | 2024-05-12 17:20:17 |         MASTER-SAAO | (03h 00m 06.35s , -63d 30m 14.0s) |   C |    60 | 18.2 |        
   30744 | 2024-05-12 17:21:37 |         MASTER-SAAO | (03h 00m 04.41s , -61d 24m 35.8s) |   C |    60 | 18.4 |        
   30744 | 2024-05-12 17:21:37 |         MASTER-SAAO | (03h 03m 56.04s , -61d 37m 42.4s) |   C |    60 | 18.0 |        
   30824 | 2024-05-12 17:22:56 |         MASTER-SAAO | (03h 16m 53.14s , -61d 22m 47.5s) |   C |    60 | 18.6 |        
   30824 | 2024-05-12 17:22:56 |         MASTER-SAAO | (03h 20m 44.86s , -61d 35m 53.6s) |   C |    60 | 18.1 |        
   30904 | 2024-05-12 17:24:17 |         MASTER-SAAO | (03h 19m 00.04s , -68d 59m 14.6s) |   C |    60 | 18.6 |        
   30904 | 2024-05-12 17:24:17 |         MASTER-SAAO | (03h 24m 10.43s , -69d 12m 19.9s) |   C |    60 | 18.2 |        
   30984 | 2024-05-12 17:25:36 |         MASTER-SAAO | (02h 49m 37.63s , -65d 10m 43.8s) |   C |    60 | 18.2 |        
   30984 | 2024-05-12 17:25:36 |         MASTER-SAAO | (02h 54m 01.51s , -65d 23m 51.4s) |   C |    60 | 17.7 |        
Filter C is a clear (unfiltred) band. 


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