GCN Circular 35685

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 GRB240204.60 (trigger No 728749569,20h 39m 07.92s , -34d 31m 01.2s, R=34.82) errorbox  1 days 28036 sec after notice time and 1 days 28069 sec after trigger time at 2024-02-05 22:13:54 UT, with upper limit up to  17.1 mag. The observations began at zenith distance = 86 deg. The sun  altitude  is -41.1 deg. 

The galactic latitude b = -37 deg., longitude l =  9 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2371201

We obtain a following upper limits.  

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

  114475 | 2024-02-05 22:13:54 |         MASTER-SAAO | (23h 18m 03.91s , -55d 00m 37.9s) | P\\ |    10 | 13.1 |        
  114490 | 2024-02-05 22:13:54 |         MASTER-SAAO | (23h 18m 03.95s , -55d 00m 38.2s) | P\\ |    40 | 13.7 |  Coadd 
  114475 | 2024-02-05 22:13:54 |         MASTER-SAAO | (23h 27m 10.53s , -55d 14m 46.9s) |  P/ |    10 | 15.3 |        
  114490 | 2024-02-05 22:13:54 |         MASTER-SAAO | (23h 27m 10.57s , -55d 14m 46.3s) |  P/ |    40 | 16.1 |  Coadd 
  114493 | 2024-02-05 22:14:12 |         MASTER-SAAO | (23h 27m 10.62s , -55d 14m 46.0s) |  P/ |    10 | 15.3 |        
  114493 | 2024-02-05 22:14:12 |         MASTER-SAAO | (23h 18m 04.09s , -55d 00m 37.6s) | P\\ |    10 | 13.1 |        
  114515 | 2024-02-05 22:14:29 |         MASTER-SAAO | (23h 18m 04.16s , -55d 00m 36.1s) | P\\ |    20 | 14.0 |        
  114515 | 2024-02-05 22:14:29 |         MASTER-SAAO | (23h 27m 10.68s , -55d 14m 45.8s) |  P/ |    20 | 15.9 |        
  114543 | 2024-02-05 22:14:57 |         MASTER-SAAO | (23h 27m 10.78s , -55d 14m 44.7s) |  P/ |    20 | 15.8 |        
  114573 | 2024-02-05 22:14:57 |         MASTER-SAAO | (23h 27m 10.90s , -55d 14m 44.1s) |  P/ |    80 | 16.6 |  Coadd 
  114576 | 2024-02-05 22:15:25 |         MASTER-SAAO | (23h 18m 04.40s , -55d 00m 30.3s) | P\\ |    30 | 13.7 |        
  114611 | 2024-02-05 22:15:25 |         MASTER-SAAO | (23h 18m 04.44s , -55d 00m 30.4s) | P\\ |   100 | 14.4 |  Coadd 
  114576 | 2024-02-05 22:15:25 |         MASTER-SAAO | (23h 27m 10.95s , -55d 14m 44.5s) |  P/ |    30 | 15.9 |        
  114613 | 2024-02-05 22:16:03 |         MASTER-SAAO | (23h 18m 04.64s , -55d 00m 28.2s) | P\\ |    30 | 14.0 |        
  114614 | 2024-02-05 22:16:03 |         MASTER-SAAO | (23h 27m 11.21s , -55d 14m 43.3s) |  P/ |    30 | 16.1 |        
  114656 | 2024-02-05 22:16:40 |         MASTER-SAAO | (23h 27m 11.49s , -55d 14m 42.7s) |  P/ |    40 | 16.6 |        
  114656 | 2024-02-05 22:16:40 |         MASTER-SAAO | (23h 18m 04.78s , -55d 00m 24.9s) | P\\ |    40 | 13.8 |        
  114711 | 2024-02-05 22:16:40 |         MASTER-SAAO | (23h 27m 11.46s , -55d 14m 42.3s) |  P/ |   150 | 17.1 |  Coadd 
  114709 | 2024-02-05 22:17:28 |         MASTER-SAAO | (23h 18m 05.06s , -55d 00m 21.3s) | P\\ |    50 | 13.7 |        
  114709 | 2024-02-05 22:17:28 |         MASTER-SAAO | (23h 27m 11.61s , -55d 14m 39.5s) |  P/ |    50 | 16.2 |        
  114772 | 2024-02-05 22:18:26 |         MASTER-SAAO | (23h 27m 11.34s , -55d 14m 41.4s) |  P/ |    60 | 15.2 |        
  114859 | 2024-02-05 22:19:53 |         MASTER-SAAO | (23h 27m 25.86s , -55d 18m 47.2s) |  P/ |    60 | 15.8 |        
  115018 | 2024-02-05 22:22:32 |         MASTER-SAAO | (23h 18m 19.36s , -55d 04m 07.0s) | P\\ |    60 | 13.6 |        
  115176 | 2024-02-05 22:25:10 |         MASTER-SAAO | (23h 27m 26.02s , -55d 18m 21.2s) |  P/ |    60 | 15.4 |        
  115256 | 2024-02-05 22:26:30 |         MASTER-SAAO | (23h 18m 19.31s , -55d 03m 39.2s) | P\\ |    60 | 13.3 |        
  115335 | 2024-02-05 22:27:49 |         MASTER-SAAO | (23h 18m 19.27s , -55d 03m 30.1s) | P\\ |    60 | 13.4 |        
  115494 | 2024-02-05 22:30:28 |         MASTER-SAAO | (23h 18m 19.15s , -55d 03m 08.6s) | P\\ |    60 | 12.5 |        
  115494 | 2024-02-05 22:30:28 |         MASTER-SAAO | (23h 27m 26.72s , -55d 17m 52.7s) |  P/ |    60 | 14.7 |        
  115574 | 2024-02-05 22:31:48 |         MASTER-SAAO | (23h 18m 18.68s , -55d 02m 52.8s) | P\\ |    60 | 13.4 |        
  115653 | 2024-02-05 22:33:07 |         MASTER-SAAO | (23h 18m 18.96s , -55d 02m 46.1s) | P\\ |    60 | 13.3 |        
  115813 | 2024-02-05 22:35:47 |         MASTER-SAAO | (23h 18m 18.94s , -55d 02m 22.9s) | P\\ |    60 | 13.3 |        
  116052 | 2024-02-05 22:39:46 |         MASTER-SAAO | (23h 18m 18.18s , -55d 01m 36.2s) | P\\ |    60 | 13.3 |        
  116211 | 2024-02-05 22:42:25 |         MASTER-SAAO | (23h 27m 25.99s , -55d 16m 28.5s) |  P/ |    60 | 15.0 |        


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