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GCN Circular 35528

Subject
Fermi GRB 240112D: Global MASTER-Net observations report
Date
2024-01-12T22:31:00Z (2 months ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
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 240112D ( Fermi GBM team, GCN 35527) errorbox  42 sec after notice time and 78 sec after trigger time at 2024-01-12 21:57:23 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 52 deg. The sun  altitude  is -35.0 deg. 

The galactic latitude b = -20 deg., longitude l = 295 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2354610

We obtain a following upper limits.  

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

      89 | 2024-01-12 21:57:23 |         MASTER-SAAO | (10h 37m 28.51s , -77d 28m 52.6s) |   C |    20 | 18.4 |        
     114 | 2024-01-12 21:57:23 |         MASTER-SAAO | (10h 37m 28.45s , -77d 28m 52.6s) |   C |    70 | 19.1 |  Coadd 
      89 | 2024-01-12 21:57:23 |         MASTER-SAAO | (10h 49m 36.14s , -77d 40m 50.9s) |   C |    20 | 18.6 |        
     114 | 2024-01-12 21:57:23 |         MASTER-SAAO | (10h 49m 36.14s , -77d 40m 50.8s) |   C |    70 | 19.5 |  Coadd 
     128 | 2024-01-12 21:58:02 |         MASTER-SAAO | (10h 37m 28.13s , -77d 28m 52.8s) |   C |    20 | 18.4 |        
     128 | 2024-01-12 21:58:02 |         MASTER-SAAO | (10h 49m 35.78s , -77d 40m 50.9s) |   C |    20 | 18.6 |        
     172 | 2024-01-12 21:58:41 |         MASTER-SAAO | (10h 37m 27.74s , -77d 28m 52.7s) |   C |    30 | 18.8 |        
     172 | 2024-01-12 21:58:41 |         MASTER-SAAO | (10h 49m 35.40s , -77d 40m 51.0s) |   C |    30 | 18.9 |        
     227 | 2024-01-12 21:59:31 |         MASTER-SAAO | (10h 37m 27.15s , -77d 28m 53.1s) |   C |    40 | 18.9 |        
     282 | 2024-01-12 21:59:31 |         MASTER-SAAO | (10h 37m 27.16s , -77d 28m 53.1s) |   C |   150 | 19.7 |  Coadd 
     227 | 2024-01-12 21:59:31 |         MASTER-SAAO | (10h 49m 34.89s , -77d 40m 51.0s) |   C |    40 | 19.2 |        
     282 | 2024-01-12 21:59:31 |         MASTER-SAAO | (10h 49m 34.90s , -77d 40m 51.1s) |   C |   150 | 19.8 |  Coadd 
     303 | 2024-01-12 22:00:42 |         MASTER-SAAO | (10h 37m 26.55s , -77d 28m 53.5s) |   C |    50 | 18.9 |        
     303 | 2024-01-12 22:00:42 |         MASTER-SAAO | (10h 49m 34.21s , -77d 40m 51.2s) |   C |    50 | 19.0 |        
     377 | 2024-01-12 22:01:51 |         MASTER-SAAO | (10h 37m 26.05s , -77d 28m 53.8s) |   C |    60 | 19.2 |        
     377 | 2024-01-12 22:01:51 |         MASTER-SAAO | (10h 49m 33.67s , -77d 40m 51.6s) |   C |    60 | 19.4 |        
Filter C is a clear (unfiltred) band. 


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


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