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GCN Circular 18539

Subject
GRB 151027A: optical follow-up observations
Date
2015-10-31T06:39:13Z (9 years ago)
From
Patrick Wiggins at Wiggins Obs <paw@digis.net>
P. Wiggins reports:

Observed GRB 151027A with a .35-meter optical telescope at my home observatory, IAU 718, on 2015 October 27 from 0433 to 0732 UTC using a clear filter and obtained the following:

GRB Countpart: 18h 09m 56.71s  +61d 21m 12.78s
Reference One: 18h 10m 05.68s  +61d 23m 14.97s
Reference Two: 18h 09m 51.53s  +61d 22m 48.87s

Julian Date       Date          Ref. C    Ref. K    Var. V    C-K       Differential 
Mid Exposure   yyyy-mm-dd.ddddd Raw Mag.  Raw Mag.  Raw Mag.  Differ.   Mag.        
-------------- ---------------- --------- --------- --------- --------- ------------
2457322.689715 2015 10 27.18972    -2.937    -3.111    -1.085     0.174       15.051
2457322.692866 2015 10 27.19287    -2.433    -2.622    -1.355     0.190       14.278
2457322.700101 2015 10 27.20010    -2.732    -2.925    -1.433     0.192       14.499
2457322.703174 2015 10 27.20317    -2.921    -3.112    -1.605     0.191       14.516
2457322.724392 2015 10 27.22439    -2.909    -3.088    -1.391     0.180       14.718
2457322.758285 2015 10 27.25829    -2.949    -3.142    -1.151     0.193       14.998
2457322.786495 2015 10 27.28649    -2.906    -3.085    -0.916     0.180       15.189
2457322.801286 2015 10 27.30129    -2.901    -3.108    -0.722     0.207       15.379
2457322.814370 2015 10 27.31437    -2.879    -3.079    -0.406     0.201       15.673
END
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