TITLE:   GCN CIRCULAR
NUMBER:  14672
SUBJECT: GRB 130427A: Konkoly optical observations 
DATE:    13/05/18 19:56:36 GMT
FROM:    Janos Kelemen at Konkoly Obs/Hungary  <kelemen@konkoly.hu>

J. Kelemen (kelemen at konkoly.hu) on behalf of the GRB OT observing program
at the Konkoly Observatory.

Starting on the evening of 15/05/2013 we observed the field of GRB 130427A
(Maselli et al., GCN 14448) 18.5435 days after the burst, using a 60/90/180 cm
Schmidt telescope located at the Mountain Station of the Konkoly
Observatory equipped with an Apogee CCD camera through R filter. On the coadded 
R images (total exp.time 1120 sec) we detected the OT and the host galaxy as
well. 
Based on the nearby UCAC-4 stars we provide 20.90 +/- 0.05 magnitude in the R
band for the OT. The brightness of the host galaxy was not subtracted. 

time from GRB    exp    filter     Mag.       

18.5435        1120 s     R       20.9 +/-0.05