TITLE:   GCN CIRCULAR
NUMBER:  37628
SUBJECT: Fermi GRB 240929A: Global MASTER-Net observations report
DATE:    24/09/29 20:30:35 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-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 240929A ( Fermi GBM team, GCN 37627) errorbox  21 sec after notice time and 55 sec after trigger time at 2024-09-29 19:50:59 UT, with upper limit up to  17.9 mag. The observations began at zenith distance = 32 deg. The sun  altitude  is -43.0 deg. 

The galactic latitude b = 13 deg., longitude l = 119 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2619216

We obtain a following upper limits.  

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

      60 | 2024-09-29 19:50:59 |      MASTER-Tavrida | (00h 07m 38.65s , +74d 41m 45.4s) |  P/ |    10 | 15.9 |        
     378 | 2024-09-29 19:55:47 |      MASTER-Tavrida | (00h 07m 39.07s , +74d 41m 46.6s) |  P/ |    70 | 17.1 |        
     520 | 2024-09-29 19:57:59 |      MASTER-Tavrida | (00h 07m 38.99s , +74d 41m 46.3s) |  P/ |    90 | 17.3 |        
     692 | 2024-09-29 20:00:30 |      MASTER-Tavrida | (00h 07m 38.85s , +74d 41m 45.2s) |  P/ |   130 | 17.7 |        
     898 | 2024-09-29 20:03:42 |      MASTER-Tavrida | (00h 07m 38.77s , +74d 41m 43.8s) |  P/ |   160 | 17.6 |        
    1130 | 2024-09-29 20:07:24 |      MASTER-Tavrida | (00h 07m 38.90s , +74d 41m 43.2s) |  P/ |   180 | 17.6 |        
    1373 | 2024-09-29 20:11:27 |      MASTER-Tavrida | (00h 07m 39.18s , +74d 41m 43.7s) |  P/ |   180 | 17.8 |        
    1616 | 2024-09-29 20:15:29 |      MASTER-Tavrida | (00h 07m 39.36s , +74d 41m 45.4s) |  P/ |   180 | 17.7 |        
    1859 | 2024-09-29 20:19:33 |      MASTER-Tavrida | (00h 07m 39.49s , +74d 41m 48.9s) |  P/ |   180 | 17.9 |        


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