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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2005

INTEGRAL high energy observations of 2S 0114+65

Résumé

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 h 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 dot P = -8.9 × 10-7 s s-1. 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 × 1036 erg s-1 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 × 1012 G.
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Dates et versions

hal-03786445 , version 1 (27-09-2022)

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E. W. Bonning, Maurizio Falanga. INTEGRAL high energy observations of 2S 0114+65. Astronomy and Astrophysics - A&A, 2005, 436, pp.L31-L34. ⟨10.1051/0004-6361:200500117⟩. ⟨hal-03786445⟩
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