[vsnet-grb-info 18497] GRB 160925A: Bassano Bresciano Photometry of MASTER optical transient

GCN Circulars gcncirc at capella2.gsfc.nasa.gov
Tue Sep 27 18:45:07 JST 2016


TITLE:   GCN CIRCULAR
NUMBER:  19945
SUBJECT: GRB 160925A: Bassano Bresciano Photometry of MASTER optical transient
DATE:    16/09/27 09:44:27 GMT
FROM:    Ulisse Quadri at Bassano Bresciano Obs  <oabb at ulisse.bs.it>

U.Quadri, L.Strabla and R.Girelli report:

The photometrical observations of the MASTER optical transient (GCN 19938, 19939, 19941) 
Is it a possible optical counterpart to the FERMI GBM trigger 496473540 (GRB160925A).

The optical transient has the ID MASTER OT J222817.90-145657.4.

Observations made by the 250 mm F/4.8 Newton robotic telescope of 
(IAU station 565) Bassano Bresciano Observatory.

Observations started on 2016-09-26 at 20h 04m UT and ended 2016-09-26 at 22h 32m UT
Exposures time of 60 sec each.

Reference star is: UCAC4 376-178184
Chk Star is: UCAC4 375-181914

------------------------------------
                       CV Mag.    
     T (JD)"         OT      Chk1 
------------------------------------
2457658.33643518   16.089   13.981
2457658.33721064   15.947   13.953
2457658.33797453   16.051   13.976
2457658.33875000   16.019   13.962
2457658.33952546   16.026   13.991
2457658.34030092   15.986   13.963
2457658.34107638   16.060   13.968
2457658.34185185   16.065   13.969
2457658.34262731   16.132   13.977
2457658.34339120   16.060   13.991
2457658.34439814   16.072   13.973
2457658.34516203   15.988   13.983
2457658.34592592   16.043   13.959
2457658.34668981   16.069   13.981
2457658.34745370   15.963   14.002
2457658.34840277   16.083   13.969
2457658.34916666   16.035   13.958
2457658.34991898   16.068   13.963
2457658.35069444   16.054   13.989
2457658.35144675   15.944   13.975
2457658.35239583   15.962   13.986
2457658.35315972   16.040   14.013
2457658.35392361   16.072   13.995
2457658.35468749   15.956   13.976
2457658.35543981   15.983   13.990
2457658.35638888   15.992   13.980
2457658.35715277   16.010   13.969
2457658.35791666   15.996   13.990
2457658.35868055   15.974   13.971
2457658.35944444   15.992   13.989
2457658.36039351   16.111   13.952
2457658.36114583   16.004   14.008
2457658.36190972   15.980   13.991
2457658.36267361   15.939   13.978
2457658.36343749   16.035   14.001
2457658.36438657   15.972   13.985
2457658.36515046   16.028   13.989
2457658.36591435   16.055   13.989
2457658.36667824   16.063   13.989
2457658.36743055   16.015   13.987
2457658.36837962   16.036   13.976
2457658.36914351   15.971   13.997
2457658.36990740   15.935   13.997
2457658.37067129   16.016   13.963
2457658.37143518   16.077   14.017
2457658.37238425   15.977   13.968
2457658.37314814   15.985   13.995
2457658.37391203   15.905   13.959
2457658.37466435   15.941   13.974
2457658.37542824   15.998   13.982
2457658.37637731   16.002   13.971
2457658.37714120   15.934   13.970
2457658.37790509   15.859   13.949
2457658.37866898   15.994   13.950
2457658.37942129   16.021   13.966
2457658.38037037   16.015   13.978
2457658.38113425   16.142   13.966
2457658.38189814   15.944   14.019
2457658.38266203   16.022   13.975
2457658.38342592   16.174   13.992
2457658.38436342   16.119   14.019
2457658.38512731   16.109   13.959
2457658.38589120   16.112   13.966
2457658.38665509   15.908   13.963
2457658.38740740   16.054   13.975
2457658.38835648   16.030   13.987
2457658.38912037   16.184   13.968
2457658.39633101   16.020   14.001
2457658.39709490   15.941   13.967
2457658.39785879   16.160   13.989
2457658.39863425   15.937   13.958
2457658.39938657   16.069   13.992
2457658.40033564   16.051   13.993
2457658.40262731   16.062   13.963
2457658.40908564   15.910   14.006
2457658.40984953   16.049   13.979
2457658.41061342   16.024   13.953
2457658.41231481   16.074   13.989
2457658.41307870   16.090   13.996
2457658.41384259   15.901   13.986
2457658.41460648   16.137   13.986
2457658.41537037   16.033   13.994
2457658.41631944   16.053   13.972
2457658.41708333   16.132   13.979
2457658.41783564   16.025   13.963
2457658.41859953   16.029   13.968
2457658.41936342   16.067   13.987
2457658.42031250   16.031   13.965
2457658.42107638   16.007   13.978
2457658.42184027   16.031   13.950
2457658.42260416   15.986   13.958
2457658.42335648   16.055   13.939
2457658.42430555   16.011   13.949
2457658.42506944   15.992   13.983
2457658.42583333   15.966   13.978
2457658.42736111   16.004   13.967
2457658.42829861   16.053   13.975
2457658.42906250   16.132   13.953
2457658.42982638   15.971   13.933
2457658.43059027   16.006   13.955
2457658.43135416   16.138   13.985
2457658.43229166   15.972   13.962
2457658.43305555   15.962   13.966
2457658.43381944   16.082   13.962
2457658.43458333   15.992   13.944
2457658.43534722   15.873   13.947
2457658.43628472   15.986   13.972
2457658.43781250   16.153   13.968
2457658.43857638   16.018   13.957

Magnitudes were estimated with the UCAC4 cat. and 
are not corrected for galactic dust extinction.   

Reference: http://www.osservatoriobassano.org/GRB.asp

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