[vsnet-grb-info 14514] GRB 140213A: Skynet R-COP Detection of Optical Afterglow

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15828
SUBJECT: GRB 140213A: Skynet R-COP Detection of Optical Afterglow
DATE:    14/02/13 23:29:52 GMT
FROM:    Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet  <atrotter at physics.unc.edu>

A. Trotter, J. Haislip, D. Reichart, A. LaCluyze, A. Verveer, T. Spuck, 
A. Foster, N. Frank, K. Ivarsen, J. Moore, M. Nysewander, R. Beauchemin, 
T. Berger, M. Carroll, H. T. Cromartie, R. Egger, M. Hinckle, A. 
Ireland, M. Maples, L. Scott, and J. A. Crain report:

Skynet observed the Swift-BAT localization of GRB 140213A (Holland et 
al., GCN 15825, Swift trigger 586569) with the 14-inch R-COP telescope 
at Perth Observatory, Australia.  Observations began at 59s and 
continued until 92m post-trigger, with rotating exposures in the BVRI 
bands increasing from 10s to 80s. We detect a fading optical source in 
all bands at the position of the source detected by the Swift UVOT 
(Siegel & Holland, GCN 15826). The source faded from R=14.3 at t=113s to 
R=17.8 at t=73m.

A preliminary light curve is at:
http://www.skynet.unc.edu/grb/grb140213a.png 
<https://outlook.unc.edu/owa/redir.aspx?C=y2fEeVtlHEGuQvMGxBu8RSnt2Tap_NAIeyK3ME-qCZACrK94N0zj_7W5zZXZpIb5kE5UKcCeXkY.&URL=http%3a%2f%2fwww.skynet.unc.edu%2fgrb%2fgrb140213a.png>

Photometry is calibrated to five APASS-DR7 stars in the field, and has 
not been corrected for the Galactic foreground extinction corresponding 
to E(B-V)=0.07 (Schlegel et al. 1998).

Skynet observations are ongoing.