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GCN Circular 36409

Subject
Fermi trigger No 736733320: Global MASTER-Net observations report
Date
2024-05-07T17:46:57Z (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 GRB240507.01 (trigger No 736733320,12h 20m 07.20s , -21d 56m 24.0s, R=8.4) errorbox  62033 sec after notice time and 62310 sec after trigger time at 2024-05-07 17:27:06 UT, with upper limit up to  19.4 mag. The observations began at zenith distance = 32 deg. The sun  altitude  is -19.7 deg. 

The galactic latitude b = 40 deg., longitude l = 294 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2446532

We obtain a following upper limits.  

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

   62340 | 2024-05-07 17:27:06 |         MASTER-SAAO | (12h 10m 01.10s , -21d 44m 20.1s) |   C |    60 | 19.0 |        
   62432 | 2024-05-07 17:28:37 |         MASTER-SAAO | (12h 18m 43.29s , -21d 44m 17.8s) |   C |    60 | 19.2 |        
   62652 | 2024-05-07 17:32:17 |         MASTER-SAAO | (12h 26m 25.69s , -21d 42m 52.3s) |   C |    60 | 18.6 |        
   62744 | 2024-05-07 17:33:49 |         MASTER-SAAO | (12h 34m 56.39s , -21d 43m 35.2s) |   C |    60 | 18.2 |        
   62962 | 2024-05-07 17:37:27 |         MASTER-SAAO | (12h 00m 44.75s , -19d 50m 06.8s) |   C |    60 | 19.1 |        
   63054 | 2024-05-07 17:38:59 |         MASTER-SAAO | (12h 09m 21.14s , -19d 49m 43.7s) |   C |    60 | 19.2 |        
   63145 | 2024-05-07 17:40:30 |         MASTER-SAAO | (12h 16m 57.46s , -19d 49m 52.8s) |   C |    60 | 19.4 |        
   63236 | 2024-05-07 17:42:01 |         MASTER-SAAO | (12h 25m 30.93s , -19d 48m 21.4s) |   C |    60 | 19.3 |        
Filter C is a clear (unfiltred) band. 


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


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