Results 61 to 70 of about 2,330,942 (208)
A NICER Viewing Angle on the Accretion Stream of Vela X-1
The Astrophysical Journal, 2023 Vela X-1 is the archetypal eclipsing high-mass X-ray binary, composed of a neutron star (NS) accreting the B-star wind. It was observed by nearly all X-ray observatories, often multiple times, featuring a rich spectrum of variable emission lines. However,
Roi Rahin, Ehud Behar
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Thin Shell, Segmented X-Ray Mirrors
, 2010 Thin foil mirrors were introduced as a means of achieving high throughput in an X-ray astronomical imaging system in applications for which high angular resolution was not necessary.
R. Petre
semanticscholar +1 more source
The distribution of X-ray dips with orbital phase in Cygnus X-1 [PDF]
, 1999 We present results of a comprehensive study of the distribution of absorption dips with orbital phase in Cygnus X-1. Firstly, the distribution was obtained using archival data from all major X-ray observatories and corrected for the selection effect that
M. Bałucińska-Church +13 more
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The Telescope Calibration of the Imaging X-Ray Polarimetry Explorer
The Astronomical JournalFifty years after the very first sounding rocket measurement of cosmic X-ray polarization, the Imaging X-ray Polarimetry Explorer (IXPE) mission has effectively opened a new window into the X-ray sky.
Brian D. Ramsey +29 more
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Frontiers in Astronomy and Space SciencesHEX-P is a probe-class mission concept that will combine high spatial resolution X-ray imaging (<10″ FWHM) and broad spectral coverage (0.2–80 keV) with an effective area far superior to current facilities’ (including XMM-Newton and NuSTAR).
Kaya Mori +27 more
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INFRARED COUNTERPARTS OF X-RAY GALAXIES
Odessa Astronomical Publications, 2019 Population studies of the extragalac- tic objects are a major part of the universe large-scale structure study. Apart from radio, infrared, and visible wavelength bands, observations and further identification of extragalactic objects such as galaxies ...
A. V. Tugay, S. Yu. Shevchenko
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LOFT: THE LARGE OBSERVATORY FOR X-RAY TIMING [PDF]
The Thirteenth Marcel Grossmann Meeting, 2015 LOFT, the large observatory for X-ray timing, was selected by the European Space Agency (ESA) in February 2011 as one of four medium size mission concepts for the Cosmic Vision program that will compete for a launch opportunity in the early 2020s. LOFT will carry out high-time resolution (10 s) and spectroscopic observations (<260 eV) of compact ...
Bozzo, E., Esposito, P., Romano, P.
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Note on a polytropic β-model to fit the X-ray surface brightness of clusters of galaxies [PDF]
, 1999 In this note, I suggest that themodel used to fit the X-ray surface brightness profiles of extended sources, like groups and clusters of galaxies, has to be corrected when the counts are collected in a wide energy band comparable to the mean temperature ...
S. Ettori
semanticscholar +1 more source
Connecting the X-Ray/UV Variability of Fairall 9 with NICER: A Possible Warm Corona
The Astrophysical JournalThe Seyfert 1 active galactic nucleus Fairall 9 was targeted by NICER, Swift, and ground-based observatories for a ∼1000 day long reverberation mapping campaign.
Ethan R. Partington +9 more
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Thermal X-Ray Line Emission from Accreting Black Holes [PDF]
, 1998 We present model X-ray spectra of accreting black holes with hot advection-dominated accretion flows, paying attention to thermal emission lines from the hot plasma.
R. Narayan, J. Raymond
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