SUZAKU OBSERVATIONS OF THE HMXB 1A 1118-61

Suchy S, Pottschmidt K, Rothschild RE, Wilms J, Fürst F, Barragan L, Caballero I, Grinberg V, Kreykenbohm I, Doroshenko V, Santangelo A, Staubert R, Terada Y, Iwakari W, Makishima K (2011)

Publication Status: Published

Publication Type: Journal article

Publication year: 2011

Journal

Astrophysical Journal American Astronomical Society

Publisher: IOP PUBLISHING LTD

Book Volume: 733

Article Number: ARTN 15

Journal Issue: 1

DOI: 10.1088/0004-637X/733/1/15

Abstract

We present broadband analysis of the Be/X-ray transient 1A 1118-61 by Suzaku at the peak of its third observed outburst in 2009 January and two weeks later when the source flux had decayed by an order of magnitude. The continuum was modeled with a cutoffpl model as well as a compTT model, with both cases requiring an additional blackbody component at lower energies. We confirm the detection of a cyclotron line at similar to 55 keV and discuss the possibility of a first harmonic at similar to 110 keV. Pulse profile comparisons show a change in the profile structure at lower energies, an indication for possible changes in the accretion geometry. Phase-resolved spectroscopy in the outburst data shows a change in the continuum throughout the pulse period. The decrease in the cyclotron resonance scattering feature centroid energy also indicates that the viewing angle on the accretion column is changing throughout the pulse period.

Authors with CRIS profile

Jörn Wilms Professur für Astronomie und Astrophysik Felix Fürst Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Victoria Grinberg Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Ingo Kreykenbohm Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut

Involved external institutions

University of Paris 7 - Denis Diderot / Université Paris VII Denis Diderot FR France (FR) University of California, San Diego US United States (USA) (US) University of Maryland, Baltimore County (UMBC) US United States (USA) (US) Saitama University / 埼玉大学 JP Japan (JP) University of Tokyo JP Japan (JP) Eberhard Karls Universität Tübingen DE Germany (DE)

How to cite

APA:

Suchy, S., Pottschmidt, K., Rothschild, R.E., Wilms, J., Fürst, F., Barragan, L.,... Makishima, K. (2011). SUZAKU OBSERVATIONS OF THE HMXB 1A 1118-61. Astrophysical Journal, 733(1). https://doi.org/10.1088/0004-637X/733/1/15

MLA:

Suchy, Slawomir, et al. "SUZAKU OBSERVATIONS OF THE HMXB 1A 1118-61." Astrophysical Journal 733.1 (2011).

BibTeX: Download