Suzaku observation of a supergiant fast X-ray transient, AX J1841.0-0536
Abstract
We observed the supergiant fast X-ray transient (SFXT) AX J1841.0-0536 with Suzaku. Many short flares with durations of ~100 s were detected in the XIS and HXD bands. We found that the overall spectrum in the 1.0-40 keV band was fitted with an partially absorbed cut-off power-law plus an Fe I Kα line and an absorption feature at the center energy of ~15 keV, that we interpret as possible evidence of a resonant cyclotron absorption feature. We then made time-resolved spectra and fit them with the same models as the overall spectrum. The photon indices of the power-law were distributed in 0-2 with the trend of "harder when brighter". On the other hand, no significant difference was found, either in the absorption column densities nor in the covering fractions between any of the phases.
- Publication:
-
Suzaku 2011: Exploring the X-ray Universe: Suzaku and Beyond
- Pub Date:
- March 2012
- DOI:
- 10.1063/1.3696218
- Bibcode:
- 2012AIPC.1427..310K