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GCN Circular 36457

Subject
Fermi trigger No 737277727: Global MASTER-Net observations report
Date
2024-05-13T17:46:27Z (5 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 GRB240513.31 (trigger No 737277727,09h 39m 00.00s , -26d 10m 12.0s, R=2.21) errorbox  24416 sec after notice time and 34691 sec after trigger time at 2024-05-13 17:00:14 UT, with upper limit up to  18.8 mag. Observations started at twilight.  The observations began at zenith distance =  6 deg. The sun  altitude  is -14.9 deg. 

The galactic latitude b = 20 deg., longitude l = 258 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2454488

We obtain a following upper limits.  

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

   34722 | 2024-05-13 17:00:14 |         MASTER-SAAO | (09h 34m 08.08s , -27d 10m 41.6s) |   C |    60 | 18.6 |        
   34722 | 2024-05-13 17:00:14 |         MASTER-SAAO | (09h 36m 15.82s , -27d 23m 44.0s) |   C |    60 | 17.7 |        
   34801 | 2024-05-13 17:01:33 |         MASTER-SAAO | (09h 43m 04.51s , -27d 11m 59.9s) |   C |    60 | 18.6 |        
   34801 | 2024-05-13 17:01:34 |         MASTER-SAAO | (09h 45m 12.36s , -27d 25m 02.9s) |   C |    60 | 17.5 |        
   35066 | 2024-05-13 17:05:58 |         MASTER-SAAO | (09h 24m 59.70s , -25d 18m 20.2s) |   C |    60 | 18.8 |        
   35066 | 2024-05-13 17:05:58 |         MASTER-SAAO | (09h 26m 59.64s , -25d 31m 25.3s) |   C |    60 | 17.7 |        
   35146 | 2024-05-13 17:07:18 |         MASTER-SAAO | (09h 33m 52.55s , -25d 17m 57.1s) |   C |    60 | 18.7 |        
   35146 | 2024-05-13 17:07:18 |         MASTER-SAAO | (09h 35m 52.62s , -25d 31m 02.4s) |   C |    60 | 17.7 |        
   35225 | 2024-05-13 17:08:38 |         MASTER-SAAO | (09h 41m 45.50s , -25d 17m 46.0s) |   C |    60 | 18.7 |        
   35225 | 2024-05-13 17:08:38 |         MASTER-SAAO | (09h 43m 45.66s , -25d 30m 51.2s) |   C |    60 | 17.8 |        
   35305 | 2024-05-13 17:09:57 |         MASTER-SAAO | (09h 50m 35.56s , -25d 16m 18.3s) |   C |    60 | 18.6 |        
   35305 | 2024-05-13 17:09:57 |         MASTER-SAAO | (09h 52m 35.78s , -25d 29m 23.4s) |   C |    60 | 17.6 |        
   35385 | 2024-05-13 17:11:17 |         MASTER-SAAO | (09h 33m 05.72s , -23d 22m 13.4s) |   C |    60 | 18.7 |        
   35385 | 2024-05-13 17:11:17 |         MASTER-SAAO | (09h 35m 04.15s , -23d 35m 17.3s) |   C |    60 | 17.8 |        
   35464 | 2024-05-13 17:12:36 |         MASTER-SAAO | (09h 41m 52.20s , -23d 23m 12.5s) |   C |    60 | 18.8 |        
   35464 | 2024-05-13 17:12:36 |         MASTER-SAAO | (09h 43m 50.71s , -23d 36m 16.4s) |   C |    60 | 18.0 |        
   36212 | 2024-05-13 17:25:04 |         MASTER-SAAO | (09h 34m 19.25s , -27d 11m 32.3s) |   C |    60 | 18.6 |        
   36212 | 2024-05-13 17:25:04 |         MASTER-SAAO | (09h 36m 24.48s , -27d 24m 30.6s) |   C |    60 | 17.9 |        
   36292 | 2024-05-13 17:26:24 |         MASTER-SAAO | (09h 43m 19.56s , -27d 10m 15.7s) |   C |    60 | 18.6 |        
   36292 | 2024-05-13 17:26:24 |         MASTER-SAAO | (09h 45m 24.71s , -27d 23m 15.3s) |   C |    60 | 17.7 |        
   36372 | 2024-05-13 17:27:44 |         MASTER-SAAO | (09h 24m 59.15s , -25d 17m 48.5s) |   C |    60 | 18.6 |        
   36372 | 2024-05-13 17:27:44 |         MASTER-SAAO | (09h 27m 02.00s , -25d 30m 47.5s) |   C |    60 | 17.7 |        
   36451 | 2024-05-13 17:29:03 |         MASTER-SAAO | (09h 33m 53.45s , -25d 17m 18.4s) |   C |    60 | 18.7 |        
   36451 | 2024-05-13 17:29:03 |         MASTER-SAAO | (09h 35m 56.23s , -25d 30m 18.6s) |   C |    60 | 17.9 |        
   36531 | 2024-05-13 17:30:23 |         MASTER-SAAO | (09h 41m 46.96s , -25d 16m 06.3s) |   C |    60 | 18.7 |        
   36531 | 2024-05-13 17:30:23 |         MASTER-SAAO | (09h 43m 49.86s , -25d 29m 07.4s) |   C |    60 | 17.8 |        
   36611 | 2024-05-13 17:31:43 |         MASTER-SAAO | (09h 50m 35.13s , -25d 17m 35.3s) |   C |    60 | 18.6 |        
   36611 | 2024-05-13 17:31:43 |         MASTER-SAAO | (09h 52m 38.19s , -25d 30m 36.4s) |   C |    60 | 17.8 |        
   36690 | 2024-05-13 17:33:02 |         MASTER-SAAO | (09h 33m 13.04s , -23d 21m 49.0s) |   C |    60 | 18.7 |        
   36690 | 2024-05-13 17:33:02 |         MASTER-SAAO | (09h 35m 14.19s , -23d 34m 49.8s) |   C |    60 | 17.9 |        
   36770 | 2024-05-13 17:34:22 |         MASTER-SAAO | (09h 41m 47.34s , -23d 22m 39.0s) |   C |    60 | 18.8 |        
   36770 | 2024-05-13 17:34:22 |         MASTER-SAAO | (09h 43m 48.36s , -23d 35m 39.8s) |   C |    60 | 17.8 |        
   36850 | 2024-05-13 17:35:42 |         MASTER-SAAO | (09h 27m 17.67s , -29d 05m 23.3s) |   C |    60 | 18.7 |        
   36850 | 2024-05-13 17:35:42 |         MASTER-SAAO | (09h 29m 24.78s , -29d 18m 25.1s) |   C |    60 | 17.8 |        
   36930 | 2024-05-13 17:37:02 |         MASTER-SAAO | (09h 36m 29.72s , -29d 04m 55.8s) |   C |    60 | 18.8 |        
   36930 | 2024-05-13 17:37:02 |         MASTER-SAAO | (09h 38m 36.91s , -29d 17m 58.0s) |   C |    60 | 17.8 |        
   37009 | 2024-05-13 17:38:21 |         MASTER-SAAO | (09h 44m 39.29s , -29d 04m 54.1s) |   C |    60 | 18.8 |        
   37009 | 2024-05-13 17:38:21 |         MASTER-SAAO | (09h 46m 46.37s , -29d 17m 56.5s) |   C |    60 | 17.9 |        
   37168 | 2024-05-13 17:41:00 |         MASTER-SAAO | (09h 34m 20.69s , -27d 10m 19.6s) |   C |    60 | 18.6 |        
   37168 | 2024-05-13 17:41:00 |         MASTER-SAAO | (09h 36m 25.11s , -27d 23m 21.5s) |   C |    60 | 17.7 |        
   37248 | 2024-05-13 17:42:20 |         MASTER-SAAO | (09h 43m 19.18s , -27d 09m 20.1s) |   C |    60 | 18.7 |        
Filter C is a clear (unfiltred) band. 


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


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