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Saturday, July 11, 2020 | History

2 edition of X-ray and low energy gamma-ray observations of the 16 February 1984 solar flare found in the catalog.

X-ray and low energy gamma-ray observations of the 16 February 1984 solar flare

X-ray and low energy gamma-ray observations of the 16 February 1984 solar flare

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Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Gamma ray astronomy.,
  • Solar flares.,
  • Solar limb.,
  • X ray astronomy.

  • Edition Notes

    Other titlesX-ray and low energy gamma ray observations of the 16 February 1984 solar flare.
    StatementS.R. Kane ... [et al.].
    SeriesNASA contractor report -- NASA CR-180928.
    ContributionsKane, S. R., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18079991M

    Solar—Flare Neutrons and Gamma Rays annihilation time of the positrons, which, In turn, is a function of the positron energy and the density, temperature and degree of Ionization of the ambient medium /5,24,25/. Depending on the density and temperature of the ambient mediums positrons annihilate either directly or via Size: KB. The x-ray event maximum is taken as the minute of the peak x-ray flux. The end time is the time when the flux level decays to a point halfway between the maximum flux and the pre-flare background level. Sometimes the algorithm will not trigger on a flare with a gradual rise-time (common for limb events).

    The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) launched on 5 February is designed to image solar flares in energetic photons from soft X rays (~3 keV) to gamma rays (up to ~20 MeV) and to provide high resolution spectroscopy up to gamma-ray energies of ~20 MeV. OSSE detects several gamma-ray emission lines from a solar flare on June 4. EGRET detects high-energy gamma-ray emission from a solar flare on June COMPTEL detects neutrons from a solar flare on J and these data are used to create the first "image" of a star (i.e., the sun) in particles other than photons.

    Stereoscopic Observations of a Solar Hard X-Ray Flare with Ulysses, PVO, GRO and Yohkoh Spacecraft. Yohkoh – The Yohkoh (originally Solar A) spacecraft observed the Sun with a variety of instruments from its launch in until its failure in The observations spanned a period from one solar maximum to the next. Two instruments of particular use for flare observations were the Soft X-ray Telescope (SXT).


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X-ray and low energy gamma-ray observations of the 16 February 1984 solar flare Download PDF EPUB FB2

The Febru ( UT) solar flare was very energetic and produced a variety of emissions. The X-ray and gamma ray continuum measurement, made aboard the International Cometary Explorer (ICE) and the Pioneer Venus Orbiter (PVO), are briefly : S.

Kane, R. Klebesadel, E. Fenimore, J. Laros. Get this from a library. X-ray and low energy gamma-ray observations of the 16 February solar flare. [S R Kane; United States. National Aeronautics and Space Administration.;].

Abstract. The Febru ( UT) solar flare was very energetic and produced a variety of emissions. The X-ray and gamma ray continuum measurement, made aboard the International Cometary Explorer (ICE) and the Pioneer Venus Orbiter (PVO), are briefly described.

@article{osti_, title = {RSTN (Radio Solar Telescope Network) observations of the 16 February cosmic-ray flare}, author = {Cliver, E.W.

and Gentile, L.C. and Wells, G.D.}, abstractNote = {The radio Solar Telescope Network (RSTN) are located at Sagamore Hill (Massachusetts), Palehua (Hawaii), and Learmonth (Australia).

A fourth site at San Vito (Italy) will begin making observations. The X-ray and microwave radio emissions, as observed from the Earth, were relatively weak and no optical flare was reported. However, the hard X-ray and low energy gamma-ray observations made with the Pioneer Venus Orbiter spacecraft behind the west limb of the Sun indicate that the flare was, in reality, very intense.

The hard X-ray and low energy gamma-ray continuum observations of the 16 February solar flare made with the ICE and PVO spacecraft. The soft X-ray observations made with. X-ray spectrum of a flare observed by the RHESSI satellite.

The soft part is fitted with a thermal component (green) having a temperature of MK, and the high-energy part with a power law having two breaks at 12 keV (possibly due to the acceleration process if real) and at 50 keV, of which the origin is. This paper deals with a preliminary study of two flares observed by the PHEBUS instrument and by the Nancay Multifrequency Radioheliograph in the hard Cited by: 9.

Solar flare imaging in X-rays and γ-rays. Krucker Space Sciences Lab, University of California, Berkeley. Abstract. Recent results of solar flare imaging at X-ray and γ-ray energies are briefly summarized using observations from the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) Small Explorer mission.

Index Terms. Start studying Science 7 Unit 6 Exam. Learn vocabulary, terms, and more with flashcards, games, and other study tools. A satellite took x-ray pictures of a solar flare. How did the solar flare most likely appear on the x-ray pictures.

A solar flare is an explosive release of energy that extends outward as far as the sun's outermost. X-RAY AND GAMMA-RAY OBSERVATIONS OF A WHITE- LIGHT FLARE H.S. Hudson Center for Astrophysics and Space Sciences, Univesity of California, San Diego, USA ABSTRACT HEAO-l observed hard radiations CX- and gamma-rays) from a major solar flare on 11 July Cited by: 1.

Those events showing prolonged high-energy gamma-ray emission not accompanied by > keV hard X-ray emission are interpreted as an indication of either different acceleration processes for. The hard X-ray and low energy gamma-ray observations of the 16 February solar flare made with the ICE and PVO spacecraft.

The flare was in full view of the PVO instrument, which was behind the west limb of the sun. The X-ray source was occulted from the ICE line of. Fermi Solar Flare X-Ray and Gamma-Ray Observations.

The Fermi Gamma-ray Space Telescope was launched in June to explore high-energy phenomena in the Universe. This GI program is targeted specifically at Fermi observations of high-energy solar phenomena, primarily solar flares. We provide quicklook products, data archives.

80 keV – 1 MeV, 16 energy bands. High values for the low-energy cutoff found late in flare. Solar Physics with X-ray Observations Description: Fermi Data Analysis Workshop 25 minute presentation Wednesday, Aug 9 - AM GSFC Build Room W   SGRs are X-ray stars that sporadically emit low-energy γ-ray bursts.

if the oscillating tail of the flare is detected by Swift's X-ray Telescope K. Gamma-ray burst observations: past and. Observations of Solar Flare Continuum Energy Spectra from 10 KeV to 10 MeV.

Article (PDF Available) February Solar flare radio and hard X-ray observations and the avalanche model. The requirements for future high-resolution spatial, spectral, and temporal observations of hard X-rays, gamma rays and neutrons from solar flares are discussed in the context of current high-energy flare observations.

There is much promise from these observations for achieving a deep understanding of processes of energy release, particle acceleration and particle transport in a Cited by: Fermi GBM and LAT Solar Flare X Ray and γ Ray Observations Richard A. Schwartz1, B. Dennis2, A. Tolbert3, R.

Murphy4, G. Share5, G. Fishman6, M. Briggs6, F. Longo7, R. Diehl8, R. Wijers9 1The Catholic University of America at NASA's GSFC, 2NASA's GSFC, 3Wyle Information Systems at NASA's GSFC, 4Naval Research Laboratory, 5The University of Maryland, 6NASA Marshall Space Flight.

Title: Evidence of Significant Energy Input in the Late Phase of a Solar Flare from NuSTAR X-Ray Observations. This indicates that the standard approach of using only the flare peak time to derive the total thermal energy content of a flare can lead to a large underestimation of its value.

Comments:Cited by: 7. • X-ray observations of solar flares serve as diagnostic of flare accelerated particles and hot plasma • Need simultaneous observations at many wavelengths for full understanding of solar flares • Look forward to Solar Orbiter for new view of solar activity and space weather SCOSTEP the analysis of high-energy flare data that provides an optimum set of parameters.

To illustrate this approach, we summa-rize the analysis of gamma-ray and neutron data obtained from the June 4 solar flare with the Oriented Scintillation Spectrometer Experiment (OSSE), a satellite-based instrument developed at NRL.Gamma-ray observations in the TeV regime can certainly be considered nowa-days as a new branch of observational astronomy.

An X-ray binary is a binary system containing a compact object, either a neutron star or a stellar-mass black hole accreting, or interacting, with the matter from the companion star in such a way that produces X-ray emission.