[vsnet-grb-info 11722] GRB 120326A: Optical observations at Crni Vrh

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13113
SUBJECT: GRB 120326A: Optical observations at Crni Vrh
DATE:    12/03/26 13:17:23 GMT
FROM:    Bojan Dintinjana at OCV  <bojan.dintinjana at fmf.uni-lj.si>

B. Dintinjana and B. Mikuz on behalf of PIKA observing program at Crni 
Vrh Observatory:

We observed the afterglow of GRB 120326A (Siegel et al., GCN 13105) with 
60 cm Cichocki robotic telescope at Crni Vrh Observatory, Slovenia. The 
series of twenty 60 second exposures with R filter started at 1:27:50UT, 
440 seconds after the burst. We confirm optical afterglow at coordinates 
by C. Guidorzi (GCN 13111).

Photometry results are given in table below. The table contains the time 
since the Swift GRB detection to the middle of exposure in seconds, R 
magnitude and photometric error. The magnitudes are derived using 
comparison stars from the USNO-B1 catalogue. The 3-sigma limiting 
magnitude in R filter is around magnitude 20.5 ± 0.3


Time [s] R Mag   Err.
----------------------------
  440    18.51    0.2
  507    19.07    0.2
  574    19.21    0.3
  641    19.75    0.4
  708    19.63    0.6
  775    19.10    0.2
  842    19.48    0.3
  909    19.19    0.2
  976    19.77    0.4
1043    19.01    0.2
1110    19.11    0.2
1177    19.18    0.2
1244    19.62    0.3
1311    20.02    0.5
1379    19.35    0.3
1446    19.79    0.4
1513    19.38    0.3
1580    18.97    0.2
1647    19.42    0.3
1714    19.82    0.4
----------------------------