AstroSat view of LMC X-2: evolution of broad-band X-ray spectral properties along a complete Z-track
نویسندگان
چکیده
منابع مشابه
The Broad Band Spectral Properties of Binary X–ray Pulsars
The X–ray telescopes on board BeppoSAX are an optimal set of instruments to observe bright galactic binary pulsars. These sources emit very hard and quite complex X–ray spectra that can be accurately measured with BeppoSAX between 0.1 and 200 keV. A prototype of this complexity, the source Her X–1, shows at least seven different components in its spectrum. A broad band measure is therefore of p...
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Broad-band spectra of accreting X–ray binary pulsars can be fit by a phenomenological model composed by a power law with a high energy rollover above 10 keV, plus a blackbody component with a temperature of few hundred eV. While, at least qualitatively, the hard tail can be explained in terms of (inverse) Compton scattering, the origin of the soft component cannot find a unique explanation. Rec...
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We present the results of a BeppoSAX observation of the nearby spiral galaxy NGC 4945 in the 0.1–200 keV energy band. The nuclear X-ray emission emerges above '7 keV, through an absorber with column density NH ∼ a few 1024 cm−2. Its remarkable variability (doubling/halving timescale ∼104 s) is not associated with any appreciable spectral changes, ruling out variations of the interposed absorber...
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In about one year, five gamma–ray bursts were simultaneously observed with the Wide Field Cameras and Gamma Ray Burst Monitor aboard the BeppoSAX satellite. From some of them X–ray afterglow emission has been clearly detected with the same satellite. In order to understand how GRB emission is related to the X–ray afterglow, we are performing a systematic study of the spectral properties of thes...
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We present a comprehensive spectral analysis of black hole X-ray binaries, LMC X–1 and LMC X–3, based on BeppoSAX observations. We test both the multi-color disk plus power law (MCD+PL) model and a newly-developed Monte-Carlo simulationbased model for a Comptonized MCD (CMCD) with either a spherical or a slab-like corona, by comparing the inferred parameters with independent direct measurements...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2020
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/staa2063