Late Central Engine Activity in GRB 180205A
High Energy Astrophysical Phenomena
2019-02-27 v1
Abstract
We present optical photometry of the afterglow of the long GRB 180205A with the COATLI telescope from 217 seconds to about 5 days after the {\itshape Swift}/BAT trigger. We analyse this photometry in the conjunction with the X-ray light curve from {\itshape Swift}/XRT. The late-time light curves and spectra are consistent with the standard forward-shock scenario. However, the early-time optical and X-ray light curves show non-typical behavior; the optical light curve exhibits a flat plateau while the X-ray light curve shows a flare. We explore several scenarios and conclude that the most likely explanation for the early behavior is late activity of the central engine.
Keywords
Cite
@article{arxiv.1901.06051,
title = {Late Central Engine Activity in GRB 180205A},
author = {R. L. Becerra and A. M. Watson and N. Fraija and N. R. Butler and W. H. Lee and E. Troja and C. G. Román-Zúñiga and A. S. Kutyrev and L. C. Álvarez Nuñez and F. Ángeles and O. Chapa and S. Cuevas and A. S. Farah and J. Fuentes-Fernández and L. Figueroa and R. Langarica and F. Quirós and J. Ruíz-Díaz-Soto and C. G. Tejada S. J. Tinoco},
journal= {arXiv preprint arXiv:1901.06051},
year = {2019}
}