Results 11 to 20 of about 7,431,143 (302)
Astronomische Nachrichten, 2003 AbstractWe review highlights of the results obtained from recent Galactic X‐ray survey observations, in particular ASCA Galactic center and plane surveys and our Chandra deep survey on the (l, b) ≈ (28°.5, 0°.0) region. Strong hard X‐ray diffuse components are observed from Galactic ridge, center and bulge, and they have both thermal and non‐thermal ...
Ebisawa, K. +4 more
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BAT X‐Ray Survey. I. Methodology and X‐Ray Identification [PDF]
The Astrophysical Journal, 2008 35 pages, 10 figures, Accepted for publication in ApJ.
Ajello, M. +5 more
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A portable CCD array detector for in-situ analysis of powder samples using combined x-ray diffraction/x-ray fluorescence techniques [PDF]
, 2010 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This work describes the design, development and testing of a portable charge-coupled device detector system to be used for the simultaneous collection of X-
Intisar, Amir
core +5 more sources
Survey of X-ray pulsars in hard X-rays [PDF]
Proceedings of The Extreme sky: Sampling the Universe above 10 keV — PoS(extremesky2009), 2010 Results of spectral, timing and spatial analysis of X-ray pulsars in hard X-rays are briefly discussed. Using data of INTEGRAL, XMM-Newton and Chandra observatories we determined an optical counterparts and distances for several X-ray pulsars and built the spatial distribution of this class objects in the Galaxy. Variations of the cyclotron line energy
Alexander Lutovinov, Sergey Tsygankov
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An X‐Ray Survey of Galaxies in Pairs [PDF]
The Astrophysical Journal, 1999 Results are reported from the first survey of X-ray emission from galaxies in pairs. The sample consists of fifty-two pairs of galaxies from the Catalog of Paired Galaxies Karachentsev (1972) whose coordinates overlap ROSAT Position Sensitive Proportional Counter pointed observations.
Henriksen, M., Cousineau, S.
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The effect of proton damage on the X-ray spectral response of MOS CCDs for the swift X-ray telescope [PDF]
, 2002 The effect of non-ionising energy loss(NIEL) of protons in charge-coupled devices is to displace silicon atoms and any dopant materials present from their lattice positions to form lattice defects which in turn can trap electrons [1].
Abbey, AF +9 more
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The Soft X-ray Excess in Quasars and Deep X-ray Surveys [PDF]
Symposium - International Astronomical Union, 1994 We examine the surface density of quasars expected in the ROSAT PSPC surveys, using quasar optical luminosity functions and model continuum spectra including a soft X-ray excess. We show that the surface density is a sensitive function of the characteristic energy of the soft excess, and the absorption within the quasar as well as the interstellar ...
Ajit Kembhavi, A. C. Fabian
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The Astrophysical Journal, 2023 Dwarf galaxies are promising test beds for constraining models of supermassive and intermediate-mass black holes (MBHs) via their BH occupation fraction (BHOF).
Urmila Chadayammuri +3 more
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X-ray Surveys of the Magellanic Clouds [PDF]
Symposium - International Astronomical Union, 1984 The proximity, well-determined distance, and low foreground obscuration of the Magellanic Clouds makes them an ideal target for the study of galactic X-ray source populations. Steady progress since the initial detection of X-rays from the LMC in 1968 culminated in the recent Einstein Observatory surveys from which over three dozen supernova remnants ...
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BASS. XXI. The Data Release 2 Overview
The Astrophysical Journal Supplement Series, 2022 The BAT AGN Spectroscopic Survey (BASS) is designed to provide a highly complete census of the key physical parameters of the supermassive black holes (SMBHs) that power local active galactic nuclei (AGNs) ( z ≲ 0.3), including their bolometric ...
Michael J. Koss +26 more
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