GCN Circular 15859
Subject
GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
Date
2014-02-18T18:25:08Z (10 years ago)
From
Adam S. Trotter at UNC-Chapel Hill/PROMPT/Skynet <atrotter@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 continued observing 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, and with 4 16-inch telescopes
of the PROMPT array at CTIO, Chile. Previous observations with R-COP
began at 59s and continued until 92m post-trigger (Trotter et al., GCN
15828). Observations resumed with PROMPT-CTIO at t=5.5h, and continued
at R-COP and PROMPT-CTIO until t=32h, with a total of ~600x160s new
exposures in the BVRI bands.
We continue to detect an uncatalogued 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,
bottomed out at R=19.0 at t~6h, and then rebrightened to R=18.6 by
t=23h. Flattening or rebrightening of the light curve is observed in
all four bands.
An updated light curve is at:
http://www.skynet.unc.edu/grb/grb140213a_2.png
Magnitudes are in the Vega system, calibrated to ten APASS-DR7 stars in
the field, and have not been corrected for the Galactic foreground
extinction corresponding to E(B-V)=0.07 (Schlegel et al. 1998).
Skynet observations are ongoing.
