We present the results of our extensive search using the Bayesian block method for long tails following short bursts from a magnetar, SGR J1550-5418, over all RXTE observations of the source. We identified four bursts with extended tails, most of which occurred during its 2009 burst active episode. The durations of tails range between ~13 s and over 3 ks, which are much longer than the typical duration of bursts. We performed detailed spectral and temporal analysis of the burst tails. We find that the spectra of three tails show a thermal nature with a trend of cooling throughout the tail. We compare the results of our investigations with the properties of four other extended tails detected from SGR 1900+14 and SGR 1806-20 and suggest a scenario for the origin of the tail in the framework of the magnetar model.
@article{arxiv.1506.06700,
title = {Burst Tails from SGR J1550-5418 Observed with Rossi X-ray Timing Explorer},
author = {Sinem Sasmaz Mus and Ersin Gogus and Yuki Kaneko and Manoneeta Chakraborty and Berk Aydin},
journal= {arXiv preprint arXiv:1506.06700},
year = {2015}
}
Comments
10 pages, 7 figures, 4 tables, accepted for publication in ApJ