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Tuesday, August 4, 2020 | History

3 edition of High resolution hard x-ray spectra of solar and cosmic sources found in the catalog.

High resolution hard x-ray spectra of solar and cosmic sources

High resolution hard x-ray spectra of solar and cosmic sources

  • 6 Want to read
  • 18 Currently reading

Published by National Aeronautics and Space Administration in [Washington, D.C.? .
Written in English

    Subjects:
  • X-ray astronomy,
  • Solar flares,
  • Crab Nebula

  • Edition Notes

    Statementby Richard Alan Schwartz
    SeriesNASA-CR -- 173561, NASA contractor report -- 173561
    ContributionsUnited States. National Aeronautics and Space Administration, University of California, Berkeley. Space Sciences Laboratory
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14928552M

    High Resolution Spectroscopy of X-ray Quasars: Searching for the X-ray Absorption from the Warm-Hot Intergalactic Medium All the X-ray spectra can be fitted by a power law with the neutral hydrogen absorption method. the nondetection of X-ray absorption lines indicates that the metal abundance of the IGM should be smaller than ~ Cited by: cosmic X-ray background (CXB) and of the Earth albedo emission in the 15– keV band. We compare our CXB spectrum with recent (INTEGRAL, BeppoSAX) and past results (HEAO-1) and find good agreement. Using an independent measurement of the CXB spectrum we are able to confirm our results. This study shows that the BAT.

    (3) discussion on sub-meV resolution of X-ray beams (note that a typical energy of X-ray beams is orders of magnitude above this resolution) Minor weak points: (1) The lead title is a bit of a tease - the book is about physical basis of high resolution (energy-wise) applications, NOT the general X-ray optics book - the central theme of the Cited by: “High-Resolution Spectroscopy with the Chandra X-ray Observatory” Wednesday, August 1, p.m. Bldg. , APS Auditorium • Argonne National Laboratory The capabilities of the Chandra X-ray Observatory and XMM-Newton for high-resolution spectros-copy have brought traditional plasma diagnostic techniques to the study of cosmic plasma.

    We find that the non-detection of X-ray absorption lines indicates that the metal abundance of the IGM should be smaller than ~ solar abundance. We also discuss implications of the non-detection of any local (z ~ 0) X-ray absorption associated with the ISM, Galactic halo or local group, such as has been seen along several other lines of Cited by: provide unique high-resolution X-ray and gamma-ray imaging spectroscopy observations over the range of energies from 3 keV to 17 MeV, with high spatial resolution (down to 2 arcseconds), spectral resolution (as fine as 1 keV FWHM), and time resolution (as fine as 2 s.


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High resolution hard x-ray spectra of solar and cosmic sources Download PDF EPUB FB2

Get this from a library. High resolution hard x-ray spectra of solar and cosmic sources. [Richard Alan Schwartz; United States. National Aeronautics and Space Administration.; University of California, Berkeley. Space Sciences Laboratory.].

High-resolution (approx.1 keV) hard x-ray (14 to keV) observations of a large solar flare and the Crab Nebula were obtained during balloon flights on Octo and J using an array of cooled germanium planar detectors. Abstract High-resolution X-ray spectra of six class X1-X5 solar flares are discussed.

The spectra were recorded by spaceborne Bragg crystal spectrometers in the rangesand A. Electron temperatures derived from dielectronic satellite line to resonance line ratios for Fe XXV and Ca XIX are found to remain fairly constant aro,K. X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects.

X-radiation is absorbed by the Earth's atmosphere, so instruments to detect X-rays must be taken to high altitude by balloons, sounding rockets, and satellites.X-ray astronomy is the space science related to a type of space telescope that can see.

A Hard X-Ray Imaging Instrument is described which is capable of high resolution imaging of solar and cosmic hard X-ray sources between 2 and 80 kev during Shuttle sortie flights. The properties of solar burst sources and the resulting instrument requirements are by: 1.

The high-resolution X-ray spectra taken during a large solar flare on June 10 are presented. Many lines of highly ionized iron are resolved and identified for the first time in solar spectra. We study thermal emission in solar flares using high-resolution X-ray spectra obtained with the Si detector of the Solar X-ray Spectrometer (SOXS) mission onboard the GSAT-2 Indian spacecraft.

H.S. Hudson, A.L. MacKinnon, in The Sun as a Guide to Stellar Physics, Particle Acceleration. The existence of “ solar cosmic rays ” and their association with solar flares established the idea that violent particle acceleration somehow could happen on a relatively passive star (Forbush, ).We now know of several environments in which particle acceleration has an important.

Spectra of Cosmic X-Ray Sources. Annual Review of Astronomy and Astrophysics Integrated spectra of elliptical, spiral, and irregular galaxies, from Kennicutt (b). The solar chemical composition is an important ingredient in our understanding of the formation, structure, and evolution of both the Sun and our Solar System.

Cited by: Figure 2: Progress in sensitivity in 40 years of X-ray astronomy. Number of sources per square degree, N(>S), brighter than a given flux, S, for the –2 keV band. Courtesy of er. Imaging X-ray telescopes of increasing size and resolution were flown for extra-solar X-ray astronomy on the.

Future X-ray observatories, such as Astro-H and Athena, will deliver the first data with high spectral resolution of extended sources, enabling us to probe the velocity field of the ICM directly. A non-trivial question arises: how to extract information about the properties of the velocity field from the observed broadening and centroid shift.

We derive the spectra of the cosmic X-ray background (CXB) and of the Galactic ridge X-ray emission (GRXE) in the ~ keV range from the data of the IBIS instrument aboard the INTEGRAL satellite obtained during the four dedicated Earth-occultation observations of early Coronal Hard X-Ray Sources.

The idea of a second stage of particle acceleration in a solar flare (i.e., after that of the impulsive phase) got x-ray confirmation with the observations of SOL by Frost and Dennis ().Such a development was in fact known from the radio signatures (Section ) of extensive late-phase coronal developments, such as the type IV emissions (Castelli Author: H.

Hudson, H. Hudson, A. MacKinnon. X-rays make up X-radiation, a form of high-energy electromagnetic X-rays have a wavelength ranging from to 10 nanometres, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×10 16 Hz to 3×10 19 Hz) and energies in the range eV to keV.X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays.

A statistical study of the correlation between hard X-ray and white light emission in solar flares is performed in order to search for a link between flare-accelerated electrons and white light formation. We analyze 43 flares spanning GOES classes M and X using observations from the Reuven Ramaty.

High-resolution gamma-ray and hard x-ray spectrometer for long- duration balloon flights Proc. SPIEEUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III, NASA Balloon Flights () in NASA Historical Data Book, Vol. VII: NASA Launch Systems, Space Transportation, Human Spaceflight, and Space Science, The cool core of galaxy group NGC has a complex morphology in X-ray region, exhibiting traces of AGN feedback with the surrounding hot Intra Group Medium IGM gas.

Through detailed analysis of high resolution X-ray spectroscopy and imaging spectrometry, diverse information on the thermodynamic properties of the IGM gas can be obtained.

Coronal holes, first observed in rocket x-ray photo- graphs, were studied in detail with instruments on the Apollo Telescope Mount (ATM) of the Skylab mission in Thousands of high-resolution x-ray and W images as well as x-ray and W spectra were recorded during a period of many months when the Sun was in the low part of its activity cycle.

Extragalactic sources are expected to be more abundant as energy increases and to be the only ones responsible for very high energy cosmic rays. Precise measurements of the cosmic-ray energy spectrum can help us learn more about the transition from galactic to extragalactic sources and, thus, about the properties of the cosmic-ray sources.

Cosmic X-ray background, X-ray radiation pervading the the first X-ray detectors were flown above Earth’s X-ray-absorbing atmosphere in a sounding addition to discovering the first cosmic X-ray source, Scorpius X-1, astronomers were also puzzled by a uniform glow of X-rays with energies greater than keV (1 keV = 1, electron volts) coming from all directions.

High Resolution Spectroscopy of X-ray Quasars: Searching for the X-ray Absorption from the Warm-Hot Intergalactic Medium Taotao Fan&r3, Claude R 2 and Herman L.

Marshall2 Received ; accepted 'Department of Astronomy, University of California, Berkeley, [email protected] Qastro - berkele y. edu 2Department of Physics and Center for Space Research, MIT, 77 Mass. Ave., Cambridge,Cited by: surements of SOLT (M), the first hard X-ray flare observed with high spectral resolution (Lin and Johns ).

For intense solar flares. ASTROSAT is a multiwavelength astronomy mission with 5 instruments onboard to cover the UV( A), soft and hard x-ray regimes ( keV; keV).

Science objectives of ASTROSAT include: * Multiwavelength studies of cosmic sources, * Monitoring the X-ray sky for new transients, * All-sky survey in the hard X-ray and UV bands.