XMM-newton observations of the Small Magellanic Cloud: XMMUJ004814.1-731003, a 25.55 s Be/X-ray binary pulsar

Haber F, Eger P, Pietsch W, Corbet RHD, Sasaki M (2008)

Publication Status: Published

Publication Type: Journal article

Publication year: 2008

Journal

Astronomy & Astrophysics EDP Sciences

Publisher: EDP SCIENCES S A

Book Volume: 485

Pages Range: 177-181

Journal Issue: 1

DOI: 10.1051/0004-6361:200809540

Abstract

Aims: To investigate candidates for Be/X-ray binaries in the Small Magellanic Cloud (SMC), we observed a region around the emission nebula N19 with XMM-Newton in October 2006.
Methods: We analysed the EPIC data of the detected point sources to derive their spectral and temporal characteristics.
Results: We detected X-ray pulsations with a period of 25.550(2) s from the second-brightest source in the field, which we designate XMMU J004814.1-731003. The X-ray spectrum is well modelled by a highly absorbed (N_H = 5 ×~10²² cm^-2) power-law with photon index 1.33 ± 0.27. The precise X-ray position allows us to identify a Be star as the optical counterpart. XMMU J004814.1-731003 is located within the error circle of the transient ASCA source AX J0048.2-7309, but its position is inconsistent with that of the proposed optical counterpart of AX J0048.2-7309 (the emission line star [MA93] 215). It remains unclear if XMMU J004814.1-731003 is associated with AX J0048.2-7309. XMMU J004814.1-731003 might be identical to an RXTE pulsar that was discovered with a period of 25.5 s, but which is listed as a 51 s pulsar in the recent literature.

Authors with CRIS profile

Manami Sasaki Professur für Multiwellenlängenastronomie

Involved external institutions

University of Maryland, College Park (UMD)

United States (USA) (US)

How to cite

APA:

Haber, F., Eger, P., Pietsch, W., Corbet, R.H.D., & Sasaki, M. (2008). XMM-newton observations of the Small Magellanic Cloud: XMMUJ004814.1-731003, a 25.55 s Be/X-ray binary pulsar. Astronomy & Astrophysics, 485(1), 177-181. https://doi.org/10.1051/0004-6361:200809540

MLA:

Haber, F., et al. "XMM-newton observations of the Small Magellanic Cloud: XMMUJ004814.1-731003, a 25.55 s Be/X-ray binary pulsar." Astronomy & Astrophysics 485.1 (2008): 177-181.

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