Back
GCN Circular 37482

Subject
Fermi GRB 240913A: Global MASTER-Net observations report
Date
2024-09-13T04:01:14Z (3 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 240913A ( Fermi GBM team, GCN 37481Loading...
 
 ) errorbox  587 sec after notice time and 593 sec after trigger time at 2024-09-13 03:31:35 UT, with upper limit up to  19.0 mag. Observations started at twilight.  The observations began at zenith distance = 46 deg. The sun  altitude  is -15.3 deg. 

The galactic latitude b = -21 deg., longitude l = 183 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2599584

We obtain a following upper limits.  

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

     624 | 2024-09-13 03:31:35 |         MASTER-SAAO | (04h 33m 42.97s , +13d 31m 33.1s) |   C |    60 | 18.7 |        
     703 | 2024-09-13 03:32:54 |         MASTER-SAAO | (04h 33m 43.74s , +13d 31m 41.7s) |   C |    60 | 18.8 |        
     782 | 2024-09-13 03:34:13 |         MASTER-SAAO | (04h 33m 44.52s , +13d 31m 47.6s) |   C |    60 | 19.0 |        
     861 | 2024-09-13 03:35:32 |         MASTER-SAAO | (04h 33m 45.26s , +13d 31m 52.2s) |   C |    60 | 18.9 |        
Filter C is a clear (unfiltred) band. 


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