4U 0115 + 63: phase lags and cyclotron resonant scattering
نویسندگان
چکیده
منابع مشابه
No anticorrelation between cyclotron line energy and X-ray flux in 4U 0115+634
1 Dr. Karl Remeis-Observatory & ECAP, Universität Erlangen-Nürnberg, Sternwartstr. 7, 96049 Bamberg, Germany email: [email protected] 2 ISDC Data Center for Astrophysics, University of Geneva, 16 chemin d’Écogia, 1290 Versoix, Switzerland 3 Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany 4 School of Physics, Astronomy, and Comput...
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We report on a BeppoSAX observation of the transient X–ray pulsar 4U 0115+63 close to periastron. This led to the discovery of a dramatic luminosity variation from ∼ 2×1034 erg s−1 to ∼ 5×1036 erg s−1 (factor > ∼ 250) in less than 15 hr. The variation was accompanied by only minor (if any) changes in the emitted spectrum and pulse fraction. On the contrary an observation near apastron detected ...
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We report phase resolved spectroscopy of the transient accreting pulsar, 4U 0115+63. For the first time, more than two cylotron resonance scattering features are detected in the spectrum of an X–ray pulsar. The shape of the fundamental line appears to be complex, and this is in agreement with predictions of Monte-Carlo models. As in other pulsars, the line energies and optical depths are strong...
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We present a systematic fit of a model of resonant cyclotron scattering (RCS) to the X-ray data of ten magnetars, including canonical and transient anomalous X-ray pulsars, and soft gamma repeaters. In this scenario, non-thermal magnetar spectra in the soft X-rays (i.e. below ∼ 10 keV) result from resonant cyclotron scattering of the thermal surface emission by hot magnetospheric plasma. We fin...
متن کاملA Further Study of the Luminosity-Dependent Cyclotron Resonance Energies of the Binary X-ray Pulsar 4U 0115+63 with RXTE
The present paper reports on the RXTE observations of the binary X-ray pulsar 4U 0115+63, covering an outburst in 1999 March-April with 44 pointings. The 3−30 keV PCA spectra and the 15−50 keV HEXTE spectra were analyzed jointly for the cyclotron resonance features. When the 3−50 keV luminosity at an assumed distance of 7 kpc was in the range (5−13)×10 erg s, harmonic double cyclotron features ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2011
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201116826