Results 31 to 40 of about 225,473 (202)
X-ray sources as tracers of the large-scale structure in the Universe
, 2000 We review the current status of studies of large-scale structure in the X-ray Universe. After motivating the use X-rays for cosmological purposes, we discuss the various approaches used on different angular scales including X-ray background multipoles ...
Barcons, X. +3 more
core +2 more sources
The Full Spectrum Galactic Terrarium: MHz to TeV Observations of Various Critters [PDF]
, 2008 Multi-wavelength studies at radio, infrared, optical, X-ray, and TeV wavelengths have discovered probable counterparts to many Galactic sources of GeV emission detected by EGRET.
A. Djannati-Atai +18 more
core +4 more sources
Unbiased CLEAN for STIX in Solar Orbiter
The Astrophysical Journal Supplement Series, 2023 CLEAN is an iterative deconvolution method for radio and hard-X-ray solar imaging. In a specific step of its pipeline, CLEAN requires the convolution between an idealized version of the instrumental point-spread function (PSF), and a map collecting point
Emma Perracchione +5 more
doaj +1 more source
NASA needs and trends in cryogenic cooling [PDF]
, 1983 Projected NASA needs in spaceborne cryogenic systems and recent results of NASA cryogenic cooling technology efforts in infrared astronomy, X-ray astronomy, gamma ray astronomy, liquid helium and space stations are ...
Sherman, A.
core +1 more source
High-resolution x-ray telescopes
, 2010 High-energy astrophysics is a relatively young scientific field, made possible by space-borne telescopes. During the half-century history of x-ray astronomy, the sensitivity of focusing x-ray telescopes-through finer angular resolution and increased ...
Brissenden, R. J. +23 more
core +1 more source
Black-hole X-ray binaries in the new era of multi-messenger astronomy [PDF]
, 2021 Dimitrios Kantzas +3 more
openalex +1 more source
A Monte Carlo Simulation for the X-ray Detection Efficiency of a Multi-Cell Proportional Counter [PDF]
Journal of Astronomy and Space Sciences, 1998 The X-ray astronomy team of the Korea Astronomy Observatory (KAO) is planning to develop a multi-cell proportional counter, adopting an anti-coincidence method to reduce its internal background. We have developed a Monte Carlo code to determine the X-ray
Ki-Won Lee +3 more
doaj
Illuminating the Incidence of Extraplanar Dust Using Ultraviolet Reflection Nebulae with GALEX
The Astrophysical JournalCircumgalactic dust grains trace the circulation of mass and metals between star-forming regions and gaseous galactic halos, giving insight into feedback and tidal stripping processes.
Erin Boettcher, Edmund Hodges-Kluck
doaj +1 more source
An Overview of X-Ray Polarimetry of Astronomical Sources
Galaxies, 2018 We review the history of astronomical X-ray polarimetry based on the author’s perspective, beginning with early sounding-rocket experiments by Robert Novick at Columbia University and his team, of which the author was a member.
Martin C. Weisskopf
doaj +1 more source
Investigating Time Variability of X-Ray Absorption in Swift GRBs
The Astrophysical Journal, 2023 The existence of excess absorption in the X-ray spectra of GRBs is well known, but the primary location of the absorbing material is still uncertain. To gain more knowledge about this, we have performed a time-resolved analysis of the X-ray spectra of ...
Vlasta Valan +2 more
doaj +1 more source