منابع مشابه
ASCA observations of MCG
ASCA PV observations of the Seyfert 1 galaxy MCG63015 : rapid variability of the warm absorber. ABSTRACT We present a detailed re-analysis of the two ASCA Performance Veriication observations of the nearby Seyfert 1 galaxy MCG63015. Connrming the results of Fabian et al. (1994), we nd deenite evidence for the O vii and O viii K-shell absorption edges of the warm absorber and a doubling of the w...
متن کاملASCA observation of the polar RX J 1802 . 1 + 1804
We present X-ray data of RX J1802.1+1804 obtained by ASCA. Although it shows a clear orbital intensity modulation with an amplitude of nearly 100% below 0.5 keV in ROSAT data, the ASCA light curves are nearly flat except for a possible dip lasting about one-tenth of the orbital period. We discuss this within the model assumption of a stream-eclipsing geometry as derived from the ROSAT observati...
متن کاملASCA Observations of the Central Regions of M 31
Using ASCA, spatially integrated X-ray spectra of the central regions of M31 were studied. Data were accumulated over three different circular regions, with the radii of 3, 6 and 12, all centered on the nucleus. The spectra are relatively similar among the three regions. In the energy range above 1.5 keV, the spectra are reproduced by a combination of a disk black-body component and a black-bod...
متن کاملASCA − RXTE observations of the micro - quasar GRS 1915 + 105
A Chandra AO1 30ks HETGS observation of the X-ray transient micro-quasar GRS 1915+105 reveals absorption edges and faint line emission over the HETG energy range. We find from a preliminary analysis evidence for prominent neutral K edges associated with iron, silicon, magnesium, and tentatively sulphur. The column densities assuming solar abundances are consistent with ∼ few × 10 cm in excess o...
متن کاملExploratory ASCA Observations of Broad Absorption Line Quasi-Stellar Objects
We present the analysis and interpretation of a sample of eight ASCA observations of Broad Absorption Line Quasi-Stellar Objects (BALQSOs). This is the first moderate-sized sample of sensitive BALQSO observations above 2 keV, and the BALQSOs in our sample are among the optically brightest known (B = 14.5–18.5). Despite the ability of 2–10 keV X-rays to penetrate large column densities, we find ...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of Japan
سال: 2000
ISSN: 0004-6264,2053-051X
DOI: 10.1093/pasj/52.1.181