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Tuesday, August 11, 2020 | History

3 edition of Observations of gamma-ray bursts found in the catalog.

Observations of gamma-ray bursts

Observations of gamma-ray bursts

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  • 19 Currently reading

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

    Subjects:
  • Gamma rays.,
  • Bursts.,
  • Isotrophy.,
  • Galactic cosmic rays.,
  • Galactic radiation.,
  • Time lag.

  • Edition Notes

    Other titlesObservations of gamma ray bursts.
    StatementG.J. Fishman.
    SeriesNASA-TM -- 112117., NASA technical memorandum -- 112117.
    ContributionsUnited States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18120484M

    The observations of GRB 23 demonstrate several things about gamma-ray bursts. First, some subset of GRBs do exhibit optical bursts with fluctuations as violent as the gamma-ray variations.   Abstract. The role of the Rossi X-ray Timing Explorer (RXTE) in the study of Gamma-ray Bursts (GRBs) is reviewed. Through April , the All-Sky Monitor (ASM) and the ProportionalCoun ter Array (PCA) instruments have detected 30 GRBs.

    Get this from a library! Gamma-ray bursts. [Chryssa Kouveliotou; Ralph Antoine Marie Joseph Wijers; Stanford E Woosley;] -- A comprehensive graduate-level review of GRB astrophysics and its history, featuring the latest research by an international team of experts. "This book gives a balanced and up-to-date overview of the field of gamma-ray bursts, one that will be useful for astronomers, physicists, and other scientists. Until now, there have been no books that I know of that deal with this subject for a broader audience of scientists and educated lay people."—Ralph A.M.J. Wijers, University of Amsterdam.

    Gamma ray bursts are distributed homogeneously on the sky. This image shows the locations of the Gamma ray bursts detected by BATSE projected in galactic coordinates (the Milky Way stretches horizontally across the centre of the figure). The colours indicate the energy and duration of each burst with long duration, bright bursts appearing in red, and short duration, weak bursts in purple. We present the results of observations of the soft gamma-ray early afterglows with energy more than keV from two bright Gamma-ray bursts GRB and GRB detected by the PHEBUS instrument. Both gamma-ray bursts are strong events and give sta-tistically significant count rate in all 6 detectors of the PHEBUS instrument.


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Observations of gamma-ray bursts Download PDF EPUB FB2

This is the most complete, comprehensive, and up-to-date monograph on the physics of gamma-ray bursts, by one of the leading experts in the field, which will be an invaluable resource both for the advanced researchers and for those wishing to gain an overview of one of the most exciting topics in contemporary astrophysics.'Cited by: 9.

Astronomical gamma-ray bursts, short lived flashes of high-energy radiation, have eluded even a basic explanation for over twenty years. The Los Alamos Workshop on Gamma-Ray Bursts brought together many international scientists to summarize the current understanding of these enigmatic events, and to describe the directions of current and future : Cheng Observations of gamma-ray bursts book.

The Physics of Gamma-Ray Bursts - Kindle edition by Zhang, Bing. Download it once and read it on your Kindle device, PC, phones or tablets. Use features like bookmarks, note taking and highlighting while reading The Physics of Gamma-Ray Bursts.5/5(1).

The Physics of Gamma-Ray Bursts 1st Edition including perspectives on the possible developments expected from future observations. It then goes on to place GRBs in the broader astrophysical context of stars, galaxies and the universe, and the possible implications for fundamental physics.

Cited by: 9. Astronomical gamma-ray bursts, short lived flashes of high-energy radiation, have eluded even a basic explanation for over twenty years.

The Los Alamos Workshop on Gamma-Ray Bursts brought together many international scientists to summarize the current understanding of these enigmatic events, and to describe the directions of current and future by:   Gamma-rays coming from space are mostly absorbed by the Earth's gamma-ray astronomy could not develop until it was possible to get our detectors above all or most of the atmosphere, using balloons or spacecraft.

The first gamma-ray telescope carried into orbit, on the Explorer XI satellite inpicked up fewer than cosmic gamma-ray photons. Until recently, gamma-ray bursts could arguably have been called the biggest mystery in high-energy astronomy.

Today, however, evidence from recent satellites like Swift and Fermi indicate that the energy behind a gamma-ray burst comes from the collapse of matter into a black hole. However, the type of collapse depends on the type of gamma-ray. Abstract. Some basic observed properties of gamma-ray bursts are reviewed.

Although some properties were known 25 years ago, new and more detailed observations have been made by the Compton Observatory in the past three : Gregory J. Fishman. Gamma-ray bursts were first observed in the late s by the U.S. Vela satellites, which were built to detect gamma radiation pulses emitted by nuclear weapons tested in space.

On July 2,at UTC, the Vela 4 and Vela 3 satellites detected a flash of gamma radiation unlike any known nuclear weapons signature. Uncertain what had happened but not considering the matter particularly. This paper shows how much can be done, but to get results like this consistently, we will need new rapid-response facilities for observing gamma-ray bursts.” In addition to the gamma-ray and optical light observations, NASA’s Swift Gamma-ray Burst Mission spacecraft captured X-ray and ultraviolet data.

Cosmic gamma ray bursts (GRBs) have fascinated scientists and the public alike since their discovery in the late s. Their story is told here by some of the scientists who participated in their discovery and, after many decades of false starts, solved the problem of their origin.

Get this from a library. Observations of gamma-ray bursts. [Gerald J Fishman; United States. National Aeronautics and Space Administration.]. Figure Compton Detects Gamma-Ray Bursts.

(a) Inthe Compton Gamma-Ray Observatory was deployed by the Space Shuttle Atlantis. Weighing more than 16 tons, it was one of the largest scientific payloads ever launched into space.

The cosmological era L. Piro and K. Hurley; 5. The Swift era N. Gehrels and D. Burrows; 6. Discoveries enabled by multi-wavelength afterglow observations of gamma-ray bursts J.

Greiner; 7. Prompt emission from gamma-ray bursts T. Piran, R. Sari and R. Mochkovitch; 8. Basic gamma-ray burst afterglows P. Mészáros and R. Wijers; by:   Gamma-ray bursts (GRBs) are the most extreme explosive events in the universe.

The initial (prompt) phase lasts typically less than s and has an energy content of ~10 51 ergs, giving a luminosity that is a million times larger than the peak electromagnetic luminosity of the bright emission from an exploding-star supernova.

The GRB name is a good one because their spectra peak in the Cited by: @article{osti_, title = {HEAO-1 observations of gamma-ray bursts}, author = {Hueter, G.J.}, abstractNote = {The hard x-ray and low-energy gamma-ray experiment on the first High Energy Astronomical Observatory (HEAO-1), which operated from August, to January,detected 21 bursts above a limiting fluence sensitivity of 2 x 10/sup -7/ ergs/cm/sup 2/.

The observations were described in papers published in the journal Nature and accepted for publication by The Astrophysical Journal. Gamma ray bursts are believed to be generated when the cores of massive stars run out of nuclear fuel and collapse, blowing away their outer atmospheres while the cores collapse to form black holes.

Near-real time optical followup observations [7],[26],[24],[42] of an X-ray rich gamma-ray burst GRB, which was localized by HETE-2 in real time [6], showed that its afterglow was bright at R ≈ 14 at t ≈ seconds after the GRB, but quickly faded and was very much fainter at t>60 minutes than that have been observed previously.

Gamma Ray Burst Observations During survey observations, the GBM instrument monitors the entire available sky (that remains unocculted by the Earth) to watch for transients.

During pointed observations, there may be portions of the sky with poor sensitivity owing to the detector placement that optimizes coverage along the boresight of the LAT.

Abstract. Observations of five gamma-ray bursts made with the solar orbiter Helios-2 are reported. Wavefront timing from Helios-2, at distances of up to AU, to Vela-5A and -6A, in Earth orbit, provides source location bands as narrow as 2 arc minutes, although several degrees in length.

Several Galactic gamma-ray bursts models have moments within 2 sigma of the observations; most of the Galactic models proposed to date are no longer in acceptable agreement with the data.From the reviews: “In Gamma-Ray Bursts: The Brightest Explosions in the Universe, French gamma-ray astronomers Gilbert Vedrenne and Jean-Luc Atteia have summarized both the observational history and the theoretical understanding of GRBs through Throughout the book, each chapter is packed with references to the original papers.

Scientists have studied gamma-ray bursts, which are triggered by the collapse of massive stars, for three decades. Now, one is forcing them to reconsider what they thought they knew.