TITLE:   GCN CIRCULAR
NUMBER:  37632
SUBJECT: Fermi  trigger No 749339671: Global MASTER-Net observations report
DATE:    24/09/30 01:15:41 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

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 GRB240929.91 (trigger No 749339671,06h 19m 00.00s , -67d 34m 48.0s, R=1) errorbox  2792 sec after notice time and 2824 sec after trigger time at 2024-09-29 22:41:30 UT, with upper limit up to  18.0 mag. The observations began at zenith distance = 59 deg. The sun  altitude  is -55.1 deg. 

The galactic latitude b = -28 deg., longitude l = 278 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2619337

We obtain a following upper limits.  

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

    2854 | 2024-09-29 22:41:30 |         MASTER-SAAO | (06h 17m 46.50s , -67d 09m 07.7s) |   C |    60 | 17.2 |        
    2933 | 2024-09-29 22:42:50 |         MASTER-SAAO | (06h 38m 24.53s , -67d 08m 42.2s) |   C |    60 | 18.0 |        
    3013 | 2024-09-29 22:44:09 |         MASTER-SAAO | (06h 07m 56.31s , -69d 04m 13.1s) |   C |    60 | 16.3 |        
Filter C is a clear (unfiltred) band. 


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