TITLE:   GCN CIRCULAR
NUMBER:  35324
SUBJECT: Fermi  trigger No 724035412: Global MASTER-Net observations report
DATE:    23/12/12 01:31:31 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 GRB231212.04 (trigger No 724035412,12h 22m 50.40s , -70d 00m 00.0s, R=2.62) errorbox  51 sec after notice time and 86 sec after trigger time at 2023-12-12 00:58:14 UT, with upper limit up to  16.4 mag. The observations began at zenith distance = 54 deg. The sun  altitude  is -24.8 deg. 

The galactic latitude b = -8 deg., longitude l = 301 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2329859

We obtain a following upper limits.  

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

      97 | 2023-12-12 00:58:14 |         MASTER-SAAO | (12h 32m 07.84s , -70d 01m 00.5s) |   C |    20 | 16.0 |        
     137 | 2023-12-12 00:58:54 |         MASTER-SAAO | (12h 32m 08.70s , -70d 01m 04.8s) |   C |    20 | 16.2 |        
     181 | 2023-12-12 00:59:33 |         MASTER-SAAO | (12h 32m 08.04s , -70d 01m 02.8s) |   C |    30 | 16.3 |        
     311 | 2023-12-12 01:01:33 |         MASTER-SAAO | (12h 05m 02.83s , -69d 49m 54.0s) |   C |    50 | 11.9 |        
     397 | 2023-12-12 01:02:54 |         MASTER-SAAO | (12h 32m 07.11s , -70d 01m 15.9s) |   C |    60 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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