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GCN Circular 36394

Fermi trigger No 736461232: Global MASTER-Net observations report
2024-05-05T01:46:27Z (2 months ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
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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-Tavrida robotic telescope  (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB240503.86 (trigger No 736461232,01h 08m 31.92s , -01d 30m 00.0s, R=36.2) errorbox  1 days 17014 sec after notice time and 1 days 17049 sec after trigger time at 2024-05-05 01:17:56 UT, with upper limit up to  15.9 mag. Observations started at twilight.  The observations began at zenith distance = 69 deg. The sun  altitude  is -11.8 deg. 

The galactic latitude b = -64 deg., longitude l = 134 deg.

Real time updated cover map and OT discovered available here:

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment

  103479 | 2024-05-05 01:17:56 |      MASTER-Tavrida | (00h 35m 49.17s , +32d 29m 13.0s) |   C |    60 | 15.9 |        
  104396 | 2024-05-05 01:33:13 |      MASTER-Tavrida | (00h 35m 43.28s , +32d 27m 44.8s) |   C |    60 | 14.9 |        
  104469 | 2024-05-05 01:34:26 |      MASTER-Tavrida | (00h 45m 19.24s , +32d 28m 59.7s) |   C |    60 | 14.9 |        
Filter C is a clear (unfiltred) band. 

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

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