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GCN Circular 37548

Subject
EP EP240918a: Global MASTER-Net observations report
Date
2024-09-18T17:18:36Z (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-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the EP EP240918a ( EP Team et al., GCN 37541Not found
 
 
) errorbox  151 sec after notice time and 7592 sec after trigger time at 2024-09-18 13:31:09 UT, with upper limit up to  18.7 mag. The observations began at zenith distance = 11 deg. The sun  altitude  is -21.2 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the EP EP240918a errorbox  11305 sec after notice time and 18746 sec after trigger time at 2024-09-18 16:37:03 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance =  6 deg. The sun  altitude  is -9.7 deg. 

The galactic latitude b = 15 deg., longitude l = 78 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2606210

We obtain a following upper limits.  

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

    7623 | 2024-09-18 13:31:09 |        MASTER-Tunka | (19h 18m 13.42s , +46d 08m 39.1s) |   C |    60 | 18.7 |  Coadd 
    7862 | 2024-09-18 13:35:08 |        MASTER-Tunka | (19h 18m 10.43s , +46d 10m 42.6s) |   C |    60 | 18.1 |  Coadd 
    8024 | 2024-09-18 13:37:51 |        MASTER-Tunka | (19h 18m 10.13s , +46d 08m 47.7s) |   C |    60 | 18.1 |  Coadd 
    8187 | 2024-09-18 13:40:33 |        MASTER-Tunka | (19h 18m 13.05s , +46d 09m 18.0s) |   C |    60 | 18.1 |  Coadd 
    8424 | 2024-09-18 13:44:31 |        MASTER-Tunka | (19h 18m 09.57s , +46d 11m 00.5s) |   C |    60 | 17.9 |  Coadd 
    8585 | 2024-09-18 13:47:11 |        MASTER-Tunka | (19h 18m 09.30s , +46d 09m 05.9s) |   C |    60 | 18.1 |  Coadd 
    8747 | 2024-09-18 13:49:53 |        MASTER-Tunka | (19h 18m 12.35s , +46d 09m 17.2s) |   C |    60 | 18.2 |  Coadd 
    8987 | 2024-09-18 13:53:53 |        MASTER-Tunka | (19h 18m 09.73s , +46d 11m 20.2s) |   C |    60 | 18.0 |  Coadd 
    9150 | 2024-09-18 13:56:37 |        MASTER-Tunka | (19h 18m 08.75s , +46d 09m 26.5s) |   C |    60 | 17.7 |  Coadd 
    9313 | 2024-09-18 13:59:20 |        MASTER-Tunka | (19h 18m 11.73s , +46d 09m 54.4s) |   C |    60 | 17.6 |  Coadd 
    9559 | 2024-09-18 14:03:26 |        MASTER-Tunka | (19h 18m 08.14s , +46d 11m 40.4s) |   C |    60 | 17.4 |  Coadd 
    9724 | 2024-09-18 14:06:11 |        MASTER-Tunka | (19h 18m 08.54s , +46d 09m 46.4s) |   C |    60 | 17.1 |  Coadd 
    9885 | 2024-09-18 14:08:52 |        MASTER-Tunka | (19h 18m 10.74s , +46d 10m 01.5s) |   C |    60 | 16.8 |  Coadd 
   10121 | 2024-09-18 14:12:48 |        MASTER-Tunka | (19h 18m 08.25s , +46d 11m 59.0s) |   C |    60 | 17.2 |  Coadd 
   10282 | 2024-09-18 14:15:28 |        MASTER-Tunka | (19h 18m 06.43s , +46d 10m 03.6s) |   C |    60 | 17.2 |  Coadd 
   10442 | 2024-09-18 14:18:08 |        MASTER-Tunka | (19h 18m 09.63s , +46d 10m 27.6s) |   C |    60 | 17.2 |  Coadd 
   10678 | 2024-09-18 14:22:04 |        MASTER-Tunka | (19h 18m 07.08s , +46d 12m 16.2s) |   C |    60 | 17.3 |  Coadd 
   10837 | 2024-09-18 14:24:44 |        MASTER-Tunka | (19h 18m 06.80s , +46d 10m 20.8s) |   C |    60 | 17.2 |  Coadd 
   10997 | 2024-09-18 14:27:24 |        MASTER-Tunka | (19h 18m 08.71s , +46d 10m 37.6s) |   C |    60 | 17.1 |  Coadd 
   11234 | 2024-09-18 14:31:21 |        MASTER-Tunka | (19h 18m 05.10s , +46d 12m 31.8s) |   C |    60 | 17.1 |  Coadd 
   18777 | 2024-09-18 16:37:03 |      MASTER-Tavrida | (19h 17m 32.41s , +46d 05m 00.9s) |   C |    60 | 17.2 |        
   18777 | 2024-09-18 16:37:03 |      MASTER-Tavrida | (19h 17m 33.33s , +46d 09m 15.9s) |   C |    60 | 17.4 |        
   19669 | 2024-09-18 16:51:55 |      MASTER-Tavrida | (19h 17m 31.56s , +46d 04m 47.0s) |   C |    60 | 18.1 |        
   19669 | 2024-09-18 16:51:55 |      MASTER-Tavrida | (19h 17m 33.22s , +46d 08m 14.1s) |   C |    60 | 18.4 |        
   19920 | 2024-09-18 16:56:07 |      MASTER-Tavrida | (19h 17m 32.46s , +46d 02m 40.9s) |   C |    60 | 18.0 |        
   19921 | 2024-09-18 16:56:07 |      MASTER-Tavrida | (19h 17m 30.82s , +45d 58m 44.6s) |   C |    60 | 18.4 |        
   20774 | 2024-09-18 17:10:21 |      MASTER-Tavrida | (19h 17m 33.63s , +46d 03m 39.5s) |   C |    60 | 18.1 |        
   20775 | 2024-09-18 17:10:21 |      MASTER-Tavrida | (19h 17m 35.14s , +46d 07m 37.3s) |   C |    60 | 18.4 |        
Filter C is a clear (unfiltred) band. 


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