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GCN Circular 36509

Subject
Fermi GRB 240517A: Global MASTER-Net observations report
Date
2024-05-17T19:30:44Z (a month 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 240517A ( Fermi GBM team, GCN 36505) errorbox  7088 sec after notice time and 7120 sec after trigger time at 2024-05-17 16:40:31 UT, with upper limit up to  17.9 mag. Observations started at twilight.  The observations began at zenith distance = 67 deg. The sun  altitude  is -11.3 deg. 

The galactic latitude b = -8 deg., longitude l = 330 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2460113

We obtain a following upper limits.  

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

    7151 | 2024-05-17 16:40:31 |         MASTER-SAAO | (16h 21m 33.50s , -59d 43m 39.9s) |   C |    60 | 16.6 |        
    7151 | 2024-05-17 16:40:31 |         MASTER-SAAO | (16h 18m 01.61s , -59d 30m 46.9s) |   C |    60 | 16.9 |        
    7230 | 2024-05-17 16:41:50 |         MASTER-SAAO | (16h 37m 24.26s , -59d 42m 17.4s) |   C |    60 | 16.9 |        
    7230 | 2024-05-17 16:41:50 |         MASTER-SAAO | (16h 33m 52.81s , -59d 29m 23.6s) |   C |    60 | 17.3 |        
    7524 | 2024-05-17 16:46:43 |         MASTER-SAAO | (16h 17m 24.17s , -61d 37m 01.7s) |   C |    60 | 16.4 |        
    7524 | 2024-05-17 16:46:43 |         MASTER-SAAO | (16h 13m 38.98s , -61d 24m 10.7s) |   C |    60 | 16.8 |        
    7603 | 2024-05-17 16:48:03 |         MASTER-SAAO | (16h 34m 06.51s , -61d 38m 14.6s) |   C |    60 | 17.3 |        
    7603 | 2024-05-17 16:48:03 |         MASTER-SAAO | (16h 30m 21.46s , -61d 25m 22.9s) |   C |    60 | 17.6 |        
    8048 | 2024-05-17 16:55:28 |         MASTER-SAAO | (16h 51m 31.20s , -59d 43m 45.1s) |   C |    60 | 17.0 |        
    8048 | 2024-05-17 16:55:28 |         MASTER-SAAO | (16h 47m 59.37s , -59d 30m 50.6s) |   C |    60 | 17.4 |        
    8127 | 2024-05-17 16:56:47 |         MASTER-SAAO | (17h 07m 22.26s , -59d 42m 56.4s) |   C |    60 | 17.3 |        
    8127 | 2024-05-17 16:56:47 |         MASTER-SAAO | (17h 03m 50.70s , -59d 30m 02.9s) |   C |    60 | 17.7 |        
    8208 | 2024-05-17 16:58:08 |         MASTER-SAAO | (16h 21m 34.04s , -59d 43m 16.0s) |   C |    60 | 17.0 |        
    8208 | 2024-05-17 16:58:08 |         MASTER-SAAO | (16h 18m 01.54s , -59d 30m 25.8s) |   C |    60 | 17.3 |        
    8288 | 2024-05-17 16:59:27 |         MASTER-SAAO | (16h 37m 18.37s , -59d 44m 31.2s) |   C |    60 | 17.3 |        
    8288 | 2024-05-17 16:59:27 |         MASTER-SAAO | (16h 33m 45.99s , -59d 31m 40.8s) |   C |    60 | 17.7 |        
    8367 | 2024-05-17 17:00:47 |         MASTER-SAAO | (16h 49m 13.51s , -61d 36m 52.3s) |   C |    60 | 17.2 |        
    8367 | 2024-05-17 17:00:47 |         MASTER-SAAO | (16h 45m 28.36s , -61d 24m 03.9s) |   C |    60 | 17.5 |        
    8447 | 2024-05-17 17:02:07 |         MASTER-SAAO | (17h 06m 00.12s , -61d 38m 44.4s) |   C |    60 | 17.0 |        
    8447 | 2024-05-17 17:02:07 |         MASTER-SAAO | (17h 02m 14.93s , -61d 25m 55.3s) |   C |    60 | 17.2 |        
    8527 | 2024-05-17 17:03:26 |         MASTER-SAAO | (16h 17m 23.34s , -61d 36m 37.1s) |   C |    60 | 15.1 |        
    8527 | 2024-05-17 17:03:26 |         MASTER-SAAO | (16h 13m 37.33s , -61d 23m 50.9s) |   C |    60 | 15.1 |        
    8607 | 2024-05-17 17:04:46 |         MASTER-SAAO | (16h 34m 04.98s , -61d 37m 28.6s) |   C |    60 | 15.6 |        
    8607 | 2024-05-17 17:04:46 |         MASTER-SAAO | (16h 30m 19.07s , -61d 24m 41.5s) |   C |    60 | 15.8 |        
    8686 | 2024-05-17 17:06:06 |         MASTER-SAAO | (16h 26m 19.34s , -57d 49m 24.8s) |   C |    60 | 15.8 |        
    8686 | 2024-05-17 17:06:06 |         MASTER-SAAO | (16h 22m 57.55s , -57d 36m 38.1s) |   C |    60 | 15.9 |        
    8766 | 2024-05-17 17:07:26 |         MASTER-SAAO | (16h 41m 12.91s , -57d 50m 40.1s) |   C |    60 | 16.4 |        
    8766 | 2024-05-17 17:07:26 |         MASTER-SAAO | (16h 37m 51.22s , -57d 37m 52.7s) |   C |    60 | 16.6 |        
    8845 | 2024-05-17 17:08:45 |         MASTER-SAAO | (16h 13m 45.49s , -63d 30m 18.2s) |   C |    60 | 14.9 |        
    8845 | 2024-05-17 17:08:45 |         MASTER-SAAO | (16h 09m 43.91s , -63d 17m 32.6s) |   C |    60 | 14.9 |        
    8925 | 2024-05-17 17:10:05 |         MASTER-SAAO | (16h 31m 37.83s , -63d 32m 16.8s) |   C |    60 | 16.1 |        
    8925 | 2024-05-17 17:10:05 |         MASTER-SAAO | (16h 27m 36.26s , -63d 19m 30.1s) |   C |    60 | 16.2 |        
    9005 | 2024-05-17 17:11:24 |         MASTER-SAAO | (16h 51m 37.83s , -59d 43m 06.4s) |   C |    60 | 16.0 |        
    9005 | 2024-05-17 17:11:24 |         MASTER-SAAO | (16h 48m 04.85s , -59d 30m 18.3s) |   C |    60 | 16.3 |        
    9084 | 2024-05-17 17:12:44 |         MASTER-SAAO | (17h 07m 21.39s , -59d 44m 09.2s) |   C |    60 | 17.1 |        
    9084 | 2024-05-17 17:12:44 |         MASTER-SAAO | (17h 03m 48.50s , -59d 31m 20.3s) |   C |    60 | 17.1 |        
    9164 | 2024-05-17 17:14:03 |         MASTER-SAAO | (16h 21m 26.50s , -59d 42m 26.0s) |   C |    60 | 16.6 |        
    9164 | 2024-05-17 17:14:03 |         MASTER-SAAO | (16h 17m 52.90s , -59d 29m 39.4s) |   C |    60 | 16.9 |        
    9244 | 2024-05-17 17:15:24 |         MASTER-SAAO | (16h 37m 23.17s , -59d 43m 44.0s) |   C |    60 | 17.3 |        
    9244 | 2024-05-17 17:15:24 |         MASTER-SAAO | (16h 33m 49.73s , -59d 30m 56.4s) |   C |    60 | 17.5 |        
    9324 | 2024-05-17 17:16:44 |         MASTER-SAAO | (16h 49m 08.46s , -61d 38m 54.4s) |   C |    60 | 16.8 |        
    9324 | 2024-05-17 17:16:44 |         MASTER-SAAO | (16h 45m 22.07s , -61d 26m 06.8s) |   C |    60 | 17.1 |        
    9404 | 2024-05-17 17:18:04 |         MASTER-SAAO | (17h 06m 00.93s , -61d 38m 48.8s) |   C |    60 | 16.7 |        
    9404 | 2024-05-17 17:18:04 |         MASTER-SAAO | (17h 02m 14.89s , -61d 26m 00.0s) |   C |    60 | 17.0 |        
    9484 | 2024-05-17 17:19:23 |         MASTER-SAAO | (16h 17m 18.57s , -61d 36m 43.5s) |   C |    60 | 16.4 |        
    9484 | 2024-05-17 17:19:23 |         MASTER-SAAO | (16h 13m 31.72s , -61d 23m 57.4s) |   C |    60 | 16.4 |        
    9563 | 2024-05-17 17:20:43 |         MASTER-SAAO | (16h 34m 05.40s , -61d 38m 29.2s) |   C |    60 | 17.0 |        
    9563 | 2024-05-17 17:20:43 |         MASTER-SAAO | (16h 30m 18.65s , -61d 25m 42.0s) |   C |    60 | 17.2 |        
    9643 | 2024-05-17 17:22:03 |         MASTER-SAAO | (16h 26m 18.07s , -57d 48m 42.2s) |   C |    60 | 16.7 |        
    9643 | 2024-05-17 17:22:03 |         MASTER-SAAO | (16h 22m 55.80s , -57d 35m 55.1s) |   C |    60 | 17.0 |        
    9723 | 2024-05-17 17:23:22 |         MASTER-SAAO | (16h 41m 10.29s , -57d 49m 57.4s) |   C |    60 | 17.2 |        
    9723 | 2024-05-17 17:23:22 |         MASTER-SAAO | (16h 37m 48.20s , -57d 37m 09.6s) |   C |    60 | 17.4 |        
    9802 | 2024-05-17 17:24:42 |         MASTER-SAAO | (16h 13m 41.02s , -63d 30m 23.7s) |   C |    60 | 17.5 |        
    9802 | 2024-05-17 17:24:42 |         MASTER-SAAO | (16h 09m 38.88s , -63d 17m 37.8s) |   C |    60 | 17.6 |        
    9882 | 2024-05-17 17:26:01 |         MASTER-SAAO | (16h 31m 39.27s , -63d 31m 45.8s) |   C |    60 | 17.5 |        
    9882 | 2024-05-17 17:26:01 |         MASTER-SAAO | (16h 27m 37.24s , -63d 18m 59.0s) |   C |    60 | 17.7 |        
    9961 | 2024-05-17 17:27:21 |         MASTER-SAAO | (16h 51m 29.34s , -59d 45m 12.8s) |   C |    60 | 17.3 |        
    9961 | 2024-05-17 17:27:21 |         MASTER-SAAO | (16h 47m 55.66s , -59d 32m 24.8s) |   C |    60 | 17.6 |        
   10041 | 2024-05-17 17:28:40 |         MASTER-SAAO | (17h 07m 25.96s , -59d 45m 18.0s) |   C |    60 | 17.5 |        
   10041 | 2024-05-17 17:28:40 |         MASTER-SAAO | (17h 03m 52.56s , -59d 32m 29.1s) |   C |    60 | 17.8 |        
   10121 | 2024-05-17 17:30:00 |         MASTER-SAAO | (16h 47m 40.84s , -63d 32m 41.5s) |   C |    60 | 17.6 |        
   10121 | 2024-05-17 17:30:00 |         MASTER-SAAO | (16h 43m 38.88s , -63d 19m 53.8s) |   C |    60 | 17.9 |        
   10201 | 2024-05-17 17:31:20 |         MASTER-SAAO | (17h 05m 36.22s , -63d 31m 44.7s) |   C |    60 | 17.6 |        
Filter C is a clear (unfiltred) band. 


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


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