منابع مشابه
The broad - band X - ray spectrum of Mrk 3
We have used non-simultaneous Ginga, ASCA and ROSAT observations to investigate the complex X-ray spectrum of the Seyfert 2 galaxy Mrk 3. We find that the composite spectrum can be well described in terms of a heavily cut-off hard X-ray continuum, iron Kα emission and a soft X-ray excess, with spectral variability confined to changes in the continuum normalisation and the flux in the iron line....
متن کاملBroad Band X-ray Spectrum of Cygnus X-1
We present the hard X-ray (20 − 100 keV) observations of Cygnus X-1 obtained using a large area balloon-borne Xenon filled Multi-anode Proportional Counter (XMPC) telescope. The observations were carried out during the γ 2 state of the source and we obtain a power law photon index of 1.62±0.07. To constrain the spectral shape of the source, we have analyzed the archival EXOSAT ME argon and GSPC...
متن کاملThe broad-band X–ray spectrum of the dipping Low Mass X-ray Binary EXO0748–676
We present results of a 0.1-100 keV BeppoSAX observation of the dipping low-mass X-ray binary (LMXRB) EXO0748–676 performed in 2000 November. During the observation EXO0748–676 exhibited X-ray eclipses, type I X-ray bursts and dipping activity over a wide range of orbital phases. The 0.1–100 keV “dip– free”(ie. dipping and eclipsing intervals excluded) spectrum is complex, especially at low-ene...
متن کاملBroad-Band Soft X-ray Polarimetry
We developed an instrument design capable of measuring linear X-ray polarization over a broad-band using conventional spectroscopic optics. A set of multilayer-coated ats reects the dispersed X-rays to the instrument detectors. The intensity variation with position angle is measured to determine three Stokes parameters: I, Q, and U – all as a function of energy. By laterally grading the multila...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1998
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.1998.01750.x