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GCN Circular 36366

Subject
Fermi GRB 240501A: Global MASTER-Net observations report
Date
2024-05-01T22:16:11Z (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 GRB 240501A ( Fermi GBM team, GCN 36359) errorbox  36531 sec after notice time and 36564 sec after trigger time at 2024-05-01 21:03:58 UT, with upper limit up to  18.7 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -63.3 deg. 

The galactic latitude b = 33 deg., longitude l = 48 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2440919

We obtain a following upper limits.  

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

   36594 | 2024-05-01 21:03:58 |         MASTER-SAAO | (16h 53m 16.15s , +23d 49m 52.4s) |   C |    60 | 17.3 |        
   36834 | 2024-05-01 21:07:57 |         MASTER-SAAO | (16h 52m 07.87s , +25d 43m 11.6s) |   C |    60 | 17.2 |        
   36834 | 2024-05-01 21:07:57 |         MASTER-SAAO | (16h 50m 08.14s , +25d 56m 26.4s) |   C |    60 | 18.0 |        
   37606 | 2024-05-01 21:20:49 |         MASTER-SAAO | (16h 53m 13.91s , +23d 49m 17.4s) |   C |    60 | 17.6 |        
   37845 | 2024-05-01 21:24:48 |         MASTER-SAAO | (16h 52m 09.05s , +25d 42m 19.5s) |   C |    60 | 17.8 |        
   37845 | 2024-05-01 21:24:48 |         MASTER-SAAO | (16h 50m 08.97s , +25d 55m 36.1s) |   C |    60 | 18.1 |        
   38164 | 2024-05-01 21:30:08 |         MASTER-SAAO | (17h 09m 07.83s , +25d 43m 11.5s) |   C |    60 | 17.4 |        
   38164 | 2024-05-01 21:30:08 |         MASTER-SAAO | (17h 07m 08.17s , +25d 56m 31.5s) |   C |    60 | 18.0 |        
   38244 | 2024-05-01 21:31:27 |         MASTER-SAAO | (17h 09m 18.90s , +27d 36m 36.6s) |   C |    60 | 17.5 |        
   38244 | 2024-05-01 21:31:27 |         MASTER-SAAO | (17h 07m 17.37s , +27d 49m 56.7s) |   C |    60 | 18.1 |        
   38323 | 2024-05-01 21:32:47 |         MASTER-SAAO | (17h 09m 52.76s , +23d 49m 42.9s) |   C |    60 | 17.5 |        
   38323 | 2024-05-01 21:32:47 |         MASTER-SAAO | (17h 07m 54.74s , +24d 03m 02.5s) |   C |    60 | 17.9 |        
   38403 | 2024-05-01 21:34:07 |         MASTER-SAAO | (16h 52m 16.43s , +27d 37m 22.5s) |   C |    60 | 17.8 |        
   38403 | 2024-05-01 21:34:07 |         MASTER-SAAO | (16h 50m 14.54s , +27d 50m 42.8s) |   C |    60 | 18.1 |        
   38563 | 2024-05-01 21:36:47 |         MASTER-SAAO | (16h 53m 19.60s , +23d 48m 31.2s) |   C |    60 | 18.1 |        
   38723 | 2024-05-01 21:39:26 |         MASTER-SAAO | (17h 10m 49.86s , +29d 29m 43.5s) |   C |    60 | 17.4 |        
   38723 | 2024-05-01 21:39:26 |         MASTER-SAAO | (17h 08m 46.06s , +29d 43m 04.1s) |   C |    60 | 18.1 |        
   38802 | 2024-05-01 21:40:46 |         MASTER-SAAO | (16h 52m 15.63s , +25d 44m 21.8s) |   C |    60 | 18.3 |        
   38802 | 2024-05-01 21:40:46 |         MASTER-SAAO | (16h 50m 15.34s , +25d 57m 41.4s) |   C |    60 | 18.4 |        
   39122 | 2024-05-01 21:46:05 |         MASTER-SAAO | (17h 09m 02.87s , +25d 41m 47.7s) |   C |    60 | 17.9 |        
   39122 | 2024-05-01 21:46:05 |         MASTER-SAAO | (17h 07m 02.99s , +25d 55m 09.0s) |   C |    60 | 18.2 |        
   39201 | 2024-05-01 21:47:25 |         MASTER-SAAO | (17h 09m 26.70s , +27d 35m 54.8s) |   C |    60 | 17.6 |        
   39201 | 2024-05-01 21:47:25 |         MASTER-SAAO | (17h 07m 24.96s , +27d 49m 15.1s) |   C |    60 | 17.9 |        
   39281 | 2024-05-01 21:48:45 |         MASTER-SAAO | (17h 09m 55.70s , +23d 49m 26.1s) |   C |    60 | 18.3 |        
   39281 | 2024-05-01 21:48:45 |         MASTER-SAAO | (17h 07m 57.38s , +24d 02m 45.1s) |   C |    60 | 18.4 |        
   39361 | 2024-05-01 21:50:04 |         MASTER-SAAO | (16h 52m 13.52s , +27d 36m 33.4s) |   C |    60 | 18.4 |        
   39361 | 2024-05-01 21:50:04 |         MASTER-SAAO | (16h 50m 11.40s , +27d 49m 53.5s) |   C |    60 | 18.5 |        
   39520 | 2024-05-01 21:52:44 |         MASTER-SAAO | (17h 25m 55.79s , +25d 42m 09.2s) |   C |    60 | 17.7 |        
   39520 | 2024-05-01 21:52:44 |         MASTER-SAAO | (17h 23m 55.98s , +25d 55m 28.9s) |   C |    60 | 18.2 |        
   39600 | 2024-05-01 21:54:04 |         MASTER-SAAO | (17h 09m 52.24s , +22d 09m 04.1s) |   C |    60 | 18.6 |        
   39680 | 2024-05-01 21:55:24 |         MASTER-SAAO | (17h 10m 53.56s , +29d 30m 44.6s) |   C |    60 | 18.1 |        
   39680 | 2024-05-01 21:55:24 |         MASTER-SAAO | (17h 08m 49.58s , +29d 44m 05.5s) |   C |    60 | 18.5 |        
   39760 | 2024-05-01 21:56:43 |         MASTER-SAAO | (17h 26m 30.57s , +27d 35m 06.7s) |   C |    60 | 17.9 |        
   39760 | 2024-05-01 21:56:43 |         MASTER-SAAO | (17h 24m 28.92s , +27d 48m 27.4s) |   C |    60 | 18.4 |        
   39839 | 2024-05-01 21:58:03 |         MASTER-SAAO | (17h 24m 38.91s , +24d 00m 31.5s) |   C |    60 | 18.7 |        
   40083 | 2024-05-01 22:02:07 |         MASTER-SAAO | (17h 09m 09.51s , +25d 43m 30.0s) |   C |    60 | 18.6 |        
   40083 | 2024-05-01 22:02:07 |         MASTER-SAAO | (17h 07m 09.27s , +25d 56m 50.5s) |   C |    60 | 18.6 |        
   40163 | 2024-05-01 22:03:27 |         MASTER-SAAO | (17h 09m 22.16s , +27d 36m 53.9s) |   C |    60 | 18.4 |        
   40163 | 2024-05-01 22:03:27 |         MASTER-SAAO | (17h 07m 20.08s , +27d 50m 14.9s) |   C |    60 | 18.5 |        
   40243 | 2024-05-01 22:04:46 |         MASTER-SAAO | (17h 09m 53.61s , +23d 49m 53.2s) |   C |    60 | 18.7 |        
   40243 | 2024-05-01 22:04:46 |         MASTER-SAAO | (17h 07m 55.05s , +24d 03m 13.1s) |   C |    60 | 18.6 |        
   40322 | 2024-05-01 22:06:06 |         MASTER-SAAO | (16h 52m 17.94s , +27d 37m 36.6s) |   C |    60 | 18.6 |        
   40322 | 2024-05-01 22:06:06 |         MASTER-SAAO | (16h 50m 15.56s , +27d 50m 58.5s) |   C |    60 | 18.6 |        
   40402 | 2024-05-01 22:07:25 |         MASTER-SAAO | (16h 53m 20.45s , +29d 30m 35.1s) |   C |    60 | 18.6 |        
   40482 | 2024-05-01 22:08:45 |         MASTER-SAAO | (17h 24m 02.65s , +25d 54m 40.1s) |   C |    60 | 18.5 |        
   40482 | 2024-05-01 22:08:45 |         MASTER-SAAO | (17h 26m 02.39s , +25d 41m 18.2s) |   C |    60 | 18.3 |        
   40561 | 2024-05-01 22:10:05 |         MASTER-SAAO | (17h 09m 54.66s , +22d 08m 51.9s) |   C |    60 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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


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