TITLE:   GCN CIRCULAR
NUMBER:  39280
SUBJECT: EP250207b: Global MASTER-Net observations report
DATE:    25/02/11 09:27:30 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

V.Lipunov, E.Gorbovskoy, N.Tiurina,  P.Balanutsa, , D.Vlasenko, I.Panchenko,
A.Kuznetsov,  G.Antipov,  A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin,
V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU),
O.Gress, N.Budnev (ISU),
C.Francile,  F. Podesta, R.Podesta, E. Gonzalez  (Observatorio Astronomico Felix Aguilar (OAFA),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)
D.Buckley (SAAO),
R.Rebolo (The Instituto de Astrofisica de Canarias),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) 

MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the EP250207b ( EP Team et al., GCN 39266) errorbox  85997 sec after notice time and 2 days 65886 sec after trigger time at 2025-02-11 09:10:12 UT, with upper limit up to  19.7 mag. Observations started at twilight.  The observations began at zenith distance = 46 deg. The sun  altitude  is -12.9 deg. 

The galactic latitude b = 47 deg., longitude l = 265 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2774311

We obtain a following upper limits.  

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

  238716 | 2025-02-11 09:10:12 |         MASTER-OAFA | (11h 10m 01.86s , -07d 30m 20.4s) |   C |    60 | 19.6 |        
  238776 | 2025-02-11 09:10:12 |         MASTER-OAFA | (11h 10m 01.86s , -07d 30m 20.4s) |   C |   180 | 19.7 |  Coadd 
  238791 | 2025-02-11 09:11:26 |         MASTER-OAFA | (11h 09m 58.99s , -07d 28m 45.5s) |   C |    60 | 19.4 |        
  238865 | 2025-02-11 09:12:41 |         MASTER-OAFA | (11h 09m 59.00s , -07d 30m 13.6s) |   C |    60 | 19.1 |        
  238957 | 2025-02-11 09:13:57 |         MASTER-OAFA | (11h 10m 02.25s , -07d 28m 50.3s) |   C |    90 | 19.4 |        
  239064 | 2025-02-11 09:15:45 |         MASTER-OAFA | (11h 09m 56.51s , -07d 29m 42.1s) |   C |    90 | 19.3 |        
  239167 | 2025-02-11 09:17:28 |         MASTER-OAFA | (11h 09m 56.54s , -07d 28m 41.5s) |   C |    90 | 19.2 |        
  239273 | 2025-02-11 09:19:14 |         MASTER-OAFA | (11h 10m 01.95s , -07d 29m 41.2s) |   C |    90 | 19.0 |        
  239378 | 2025-02-11 09:20:59 |         MASTER-OAFA | (11h 09m 56.56s , -07d 30m 41.0s) |   C |    90 | 18.8 |        
Filter C is a clear (unfiltred) band. 


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