Volume 545, September 2012
|Number of page(s)||8|
|Section||Stellar structure and evolution|
|Published online||11 September 2012|
IGR J18179-1621: an obscured X-ray pulsar discovered by INTEGRAL ⋆
ISDC, Data Center for Astrophysics of the University of
chemin d’Écogia 16,
2 International Space Science Institute (ISSI), Hallerstrasse 6, 3012 Bern, Switzerland
Received: 4 April 2012
Accepted: 19 July 2012
We report on all the INTEGRAL and Swift data collected during the first outburst observed from IGR J18179-1621. The broad-band spectral analysis showed that the X-ray emission from the source is heavily absorbed (NH ≃ 1023 cm-2), and well-described by a flat power-law with a high energy rollover (cutoff energy 9−12 keV, e-folding energy 4−7 keV). We found some evidence of a cyclotron absorption feature at 22 ± 1 keV. Together with the pulsations at 11.8 s discovered in the XRT data, this evidence would suggest that IGR J18179-1621 is an obscured, magnetized, accreting neutron star that is possibly part of a supergiant high-mass X-ray binary or a Be X-ray binary system.
Key words: X-rays: binaries / stars: individual: IGR J18179-1621 / stars: neutron / X-rays: stars
Appendix A is available in electronic form at http://www.aanda.org
© ESO, 2012
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.