TITLE:   GCN CIRCULAR
NUMBER:  33184
SUBJECT: Fermi GRB 230117A: Global MASTER-Net observations report 
DATE:    23/01/17 09:30:16 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, D. Vlasenko, 
G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin
(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. Gres, N.M. Budnev
(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),

A. Gabovich, V.Yurkov 
(Blagoveschensk Educational State University)


MASTER-Amur robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 230117A ( Fermi GBM team, GCN 33183) errorbox  14857 sec after notice time and 14892 sec after trigger time at 2023-01-17 09:12:16 UT, with upper limit up to  12.6 mag. Observations started at twilight.  The observations began at zenith distance = 11 deg. The sun  altitude  is -11.4 deg. 

The galactic latitude b = -24 deg., longitude l = 124 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2192799

We obtain a following upper limits.  

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

   14982 | 2023-01-17 09:12:16 |         MASTER-Amur | (00h 43m 54.98s , +41d 16m 16.5s) |   C |   180 | 12.6 |        
   15402 | 2023-01-17 09:20:15 |         MASTER-Amur | (00h 54m 56.32s , +39d 10m 24.1s) |   C |    60 | 12.1 |        
   15561 | 2023-01-17 09:22:55 |         MASTER-Amur | (00h 53m 28.23s , +37d 17m 23.6s) |   C |    60 | 12.3 |        
Filter C is a clear (unfiltred) band. 


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