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GCN Circular 35890

Subject
Fermi GRB 240305A: Global MASTER-Net observations report
Date
2024-03-06T19:30:41Z (9 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 240305A ( Fermi GBM team, GCN 35869Not found
 
 
) errorbox  1 days 30310 sec after notice time and 1 days 30342 sec after trigger time at 2024-03-06 18:15:03 UT, with upper limit up to  19.4 mag. Observations started at twilight.  The observations began at zenith distance = 55 deg. The sun  altitude  is -14.9 deg. 

The galactic latitude b = -74 deg., longitude l = 279 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2391924

We obtain a following upper limits.  

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

  116772 | 2024-03-06 18:15:03 |         MASTER-SAAO | (01h 52m 23.63s , -44d 32m 26.3s) |   C |    60 | 13.7 |        
  117330 | 2024-03-06 18:24:20 |         MASTER-SAAO | (01h 23m 00.92s , -38d 48m 51.7s) |   C |    60 | 12.3 |        
  118229 | 2024-03-06 18:39:19 |         MASTER-SAAO | (01h 36m 10.23s , -42d 27m 04.8s) |   C |    60 | 13.2 |        
  118229 | 2024-03-06 18:39:19 |         MASTER-SAAO | (01h 42m 50.95s , -42d 39m 23.8s) |   C |    60 | 15.1 |        
  118309 | 2024-03-06 18:40:39 |         MASTER-SAAO | (01h 30m 42.38s , -38d 40m 29.4s) |   C |    60 | 14.5 |        
  118309 | 2024-03-06 18:40:39 |         MASTER-SAAO | (01h 37m 00.55s , -38d 52m 46.6s) |   C |    60 | 13.7 |        
  118388 | 2024-03-06 18:41:59 |         MASTER-SAAO | (01h 20m 49.84s , -46d 15m 01.5s) |   C |    60 | 16.2 |        
  118388 | 2024-03-06 18:41:59 |         MASTER-SAAO | (01h 27m 56.71s , -46d 27m 27.1s) |   C |    60 | 15.7 |        
  118468 | 2024-03-06 18:43:19 |         MASTER-SAAO | (00h 54m 49.20s , -42d 27m 18.8s) |   C |    60 | 17.2 |        
  118468 | 2024-03-06 18:43:19 |         MASTER-SAAO | (01h 01m 28.21s , -42d 39m 44.6s) |   C |    60 | 15.0 |        
  118548 | 2024-03-06 18:44:38 |         MASTER-SAAO | (01h 39m 17.93s , -44d 20m 50.7s) |   C |    60 | 15.4 |        
  118548 | 2024-03-06 18:44:38 |         MASTER-SAAO | (01h 46m 10.88s , -44d 33m 13.0s) |   C |    60 | 15.3 |        
  118627 | 2024-03-06 18:45:58 |         MASTER-SAAO | (00h 56m 45.33s , -44d 21m 16.1s) |   C |    60 | 18.3 |        
  118627 | 2024-03-06 18:45:58 |         MASTER-SAAO | (01h 03m 37.12s , -44d 33m 43.9s) |   C |    60 | 18.3 |        
  118707 | 2024-03-06 18:47:18 |         MASTER-SAAO | (00h 53m 11.03s , -40d 34m 12.1s) |   C |    60 | 19.2 |        
  118707 | 2024-03-06 18:47:18 |         MASTER-SAAO | (00h 59m 38.30s , -40d 46m 36.9s) |   C |    60 | 19.4 |        
  118787 | 2024-03-06 18:48:38 |         MASTER-SAAO | (01h 15m 34.39s , -42d 28m 26.0s) |   C |    60 | 19.4 |        
  118787 | 2024-03-06 18:48:38 |         MASTER-SAAO | (01h 22m 13.76s , -42d 40m 50.0s) |   C |    60 | 19.3 |        
  118866 | 2024-03-06 18:49:57 |         MASTER-SAAO | (01h 13m 16.50s , -40d 32m 48.9s) |   C |    60 | 19.3 |        
  118866 | 2024-03-06 18:49:57 |         MASTER-SAAO | (01h 19m 43.99s , -40d 45m 11.2s) |   C |    60 | 19.3 |        
  118946 | 2024-03-06 18:51:17 |         MASTER-SAAO | (01h 18m 00.60s , -44d 22m 20.9s) |   C |    60 | 19.4 |        
  118946 | 2024-03-06 18:51:17 |         MASTER-SAAO | (01h 24m 52.76s , -44d 34m 46.7s) |   C |    60 | 19.4 |        
  119026 | 2024-03-06 18:52:37 |         MASTER-SAAO | (01h 33m 22.27s , -40d 32m 35.9s) |   C |    60 | 19.3 |        
Filter C is a clear (unfiltred) band. 


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