Burst Tails from SGR J1550-5418 Observed with the Rossi X-Ray Timing Explorer
Abstract
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 analyses 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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 2015
- DOI:
- 10.1088/0004-637X/807/1/42
- arXiv:
- arXiv:1506.06700
- Bibcode:
- 2015ApJ...807...42M
- Keywords:
-
- pulsars: individual: SGR J1550–5418;
- 1 E 1547.0–5408;
- PSR J1550–5418;
- stars: neutron;
- X-rays: stars;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 10 pages, 7 figures, 4 tables, accepted for publication in ApJ