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GCN Circular 34898

Subject
Fermi trigger No 720224759: Global MASTER-Net observations report
Date
2023-10-28T22:45:36Z (6 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-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 GRB231028.93 (trigger No 720224759,21h 06m 43.20s , +52d 09m 36.0s, R=5.16) errorbox  32 sec after notice time and 42 sec after trigger time at 2023-10-28 22:26:37 UT, with upper limit up to  17.5 mag. The observations began at zenith distance = 57 deg. The sun  altitude  is -56.6 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB231028.93 errorbox  38 sec after notice time and 49 sec after trigger time at 2023-10-28 22:26:43 UT, with upper limit up to  15.5 mag. The observations began at zenith distance = 63 deg. The sun  altitude  is -54.1 deg. 

MASTER-Tunka robotic telescope  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB231028.93 errorbox  45 sec after notice time and 56 sec after trigger time at 2023-10-28 22:26:50 UT, with upper limit up to  16.3 mag. Observations started at twilight.  The observations began at zenith distance = 74 deg. The sun  altitude  is -13.9 deg. 

The galactic latitude b =  3 deg., longitude l = 93 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2292411

We obtain a following upper limits.  

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

      48 | 2023-10-28 22:26:37 |      MASTER-Tavrida | (21h 09m 58.71s , +51d 52m 10.9s) |   C |    10 | 16.6 |        
      55 | 2023-10-28 22:26:43 |   MASTER-Kislovodsk | (21h 00m 09.06s , +52d 25m 47.6s) |   C |    10 | 14.4 |        
      60 | 2023-10-28 22:26:50 |        MASTER-Tunka | (20h 51m 56.22s , +54d 34m 25.1s) |   C |     5 | 16.0 |        
      60 | 2023-10-28 22:26:51 |        MASTER-Tunka | (21h 04m 25.39s , +54d 20m 02.5s) |   C |     5 | 16.0 |        
      66 | 2023-10-28 22:26:54 |      MASTER-Tavrida | (21h 10m 06.23s , +51d 52m 20.8s) |   C |    10 | 16.6 |        
      87 | 2023-10-28 22:27:11 |      MASTER-Tavrida | (21h 10m 02.45s , +51d 53m 59.7s) |   C |    20 | 17.0 |        
      85 | 2023-10-28 22:27:13 |   MASTER-Kislovodsk | (21h 00m 05.64s , +52d 27m 09.1s) |   C |    10 | 14.4 |        
      84 | 2023-10-28 22:27:15 |        MASTER-Tunka | (20h 51m 56.43s , +54d 34m 21.1s) |   C |     5 | 16.2 |        
      84 | 2023-10-28 22:27:15 |        MASTER-Tunka | (21h 04m 26.29s , +54d 19m 48.9s) |   C |     5 | 15.5 |        
     114 | 2023-10-28 22:27:38 |      MASTER-Tavrida | (21h 10m 02.35s , +51d 52m 31.0s) |   C |    20 | 17.1 |        
     108 | 2023-10-28 22:27:39 |        MASTER-Tunka | (20h 51m 56.59s , +54d 34m 19.6s) |   C |     5 | 16.2 |        
     109 | 2023-10-28 22:27:39 |        MASTER-Tunka | (21h 04m 25.92s , +54d 19m 54.8s) |   C |     5 | 15.4 |        
     122 | 2023-10-28 22:27:46 |   MASTER-Kislovodsk | (21h 00m 06.10s , +52d 25m 19.5s) |   C |    20 | 15.2 |        
     133 | 2023-10-28 22:28:03 |        MASTER-Tunka | (20h 51m 56.73s , +54d 34m 17.1s) |   C |     5 | 16.1 |        
     133 | 2023-10-28 22:28:04 |        MASTER-Tunka | (21h 04m 25.74s , +54d 19m 43.7s) |   C |     5 | 14.3 |        
     148 | 2023-10-28 22:28:07 |      MASTER-Tavrida | (21h 10m 04.66s , +51d 54m 01.4s) |   C |    30 | 17.2 |        
     167 | 2023-10-28 22:28:26 |   MASTER-Kislovodsk | (21h 00m 08.12s , +52d 26m 48.3s) |   C |    30 | 15.5 |        
     157 | 2023-10-28 22:28:28 |        MASTER-Tunka | (20h 51m 56.87s , +54d 34m 15.3s) |   C |     5 | 16.3 |        
     157 | 2023-10-28 22:28:28 |        MASTER-Tunka | (21h 04m 25.90s , +54d 19m 42.6s) |   C |     5 | 14.6 |        
     185 | 2023-10-28 22:28:44 |      MASTER-Tavrida | (21h 09m 58.89s , +51d 53m 07.6s) |   C |    30 | 17.3 |        
     181 | 2023-10-28 22:28:52 |        MASTER-Tunka | (20h 51m 57.00s , +54d 34m 13.5s) |   C |     5 | 16.2 |        
     181 | 2023-10-28 22:28:52 |        MASTER-Tunka | (21h 04m 25.97s , +54d 19m 41.0s) |   C |     5 | 14.3 |        
     205 | 2023-10-28 22:29:16 |        MASTER-Tunka | (20h 51m 57.13s , +54d 34m 12.9s) |   C |     5 | 16.3 |        
     206 | 2023-10-28 22:29:16 |        MASTER-Tunka | (21h 04m 27.16s , +54d 19m 40.9s) |   C |     5 | 15.9 |        
     224 | 2023-10-28 22:29:17 |   MASTER-Kislovodsk | (21h 00m 01.87s , +52d 26m 05.8s) |   C |    40 | 13.5 |        
     229 | 2023-10-28 22:29:22 |      MASTER-Tavrida | (21h 10m 00.11s , +51d 54m 06.6s) |   C |    40 | 17.3 |        
     230 | 2023-10-28 22:29:40 |        MASTER-Tunka | (20h 51m 57.26s , +54d 34m 11.5s) |   C |     5 | 16.3 |        
     230 | 2023-10-28 22:29:41 |        MASTER-Tunka | (21h 04m 26.37s , +54d 19m 48.7s) |   C |     5 | 15.4 |        
     254 | 2023-10-28 22:30:05 |        MASTER-Tunka | (20h 51m 57.39s , +54d 34m 09.7s) |   C |     5 | 16.1 |        
     254 | 2023-10-28 22:30:05 |        MASTER-Tunka | (21h 04m 26.84s , +54d 19m 42.0s) |   C |     5 | 14.8 |        
     282 | 2023-10-28 22:30:10 |      MASTER-Tavrida | (21h 10m 06.55s , +51d 53m 05.6s) |   C |    50 | 17.4 |        
     291 | 2023-10-28 22:30:19 |   MASTER-Kislovodsk | (21h 00m 03.04s , +52d 26m 59.7s) |   C |    50 | 13.4 |        
     278 | 2023-10-28 22:30:29 |        MASTER-Tunka | (20h 51m 57.57s , +54d 34m 08.1s) |   C |     5 | 16.1 |        
     303 | 2023-10-28 22:30:53 |        MASTER-Tunka | (20h 51m 57.65s , +54d 34m 08.3s) |   C |     5 | 16.2 |        
     344 | 2023-10-28 22:31:08 |      MASTER-Tavrida | (21h 09m 59.71s , +51d 52m 03.9s) |   C |    60 | 17.5 |        
Filter C is a clear (unfiltred) band. 


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


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