TITLE:   GCN CIRCULAR
NUMBER:  37798
SUBJECT: Fermi GRB 241016B: Global MASTER-Net observations report
DATE:    24/10/16 23:47:21 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 GRB 241016B ( Fermi GBM team, GCN 37797) errorbox  41136 sec after notice time and 41168 sec after trigger time at 2024-10-16 22:38:48 UT, with upper limit up to  16.6 mag. The observations began at zenith distance = 49 deg. The sun  altitude  is -48.6 deg. 

The galactic latitude b = -59 deg., longitude l = 116 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2640094

We obtain a following upper limits.  

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

   41173 | 2024-10-16 22:38:48 |         MASTER-SAAO | (01h 46m 10.51s , +16d 54m 11.4s) |   C |    10 | 15.7 |        
   41198 | 2024-10-16 22:38:48 |         MASTER-SAAO | (01h 46m 10.50s , +16d 54m 11.5s) |   C |    60 | 16.6 |  Coadd 
   41207 | 2024-10-16 22:39:17 |         MASTER-SAAO | (01h 46m 13.23s , +16d 55m 28.1s) |   C |    20 | 16.0 |        
   41252 | 2024-10-16 22:39:56 |         MASTER-SAAO | (01h 46m 07.22s , +16d 54m 47.9s) |   C |    30 | 16.1 |        
Filter C is a clear (unfiltred) band. 


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