INTEGRAL High Energy Observations of 2S 0114+65

Details INTEGRAL High Energy Observations of 2S 0114+65 INTEGRAL High Energy Observations of 2S 0114+65

2005-04-28

arxiv.org/abs/astro-ph/0504633v1

Astron.Astrophys. 436 (2005) L31-L34

Astronomy and Astrophysics

Astrophysics

4 pages, 5 figures, accepted to A&A Letters

Scientific paper

10.1051/0004-6361:200500117

We report the first INTEGRAL timing and spectral analysis of the high mass X-ray binary source 2S 0114+65 at high energies (5-100 keV). The pulse period was found at 2.668 hr with a high pulsed fraction, ~80% in both the 20-40 keV and 40-80 keV energy bands. The spin-up trend over ~8 years was measured to be -8.9 * 10^{-7}. The hard X-ray spectrum obtained with JEM-X/ISGRI is well described by a high energy exponential cut-off power law model where the estimated luminosity is 1.8 * 10^{36} erg/s in the 5-100 keV energy band, for a source distance of 7.2 kpc. We tentatively identify a cyclotron resonance scattering feature at ~22 keV with one harmonic, implying a magnetic field of 2.5 * 10^{12} G.

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