Gamma-Ray Burst Observations by Pioneer Venus Orbiter

  title={Gamma-Ray Burst Observations by Pioneer Venus Orbiter},
  author={W. D. Evans and J. P. Glore and Ray W. Klebesadel and John G. Laros and E. R. Tech and Richard Spalding},
  pages={119 - 121}
The Pioneer Venus orbiter gamma burst detector is an astrophysics experiment for monitoring cosmic gamma-ray bursts. It is included in this planetary mission to provide a long baseline for accurately locating the sources ofthese bursts in order to identify them with specific astronomical objects. Responses to 14 gammaray burst events were examined; these events were verified from data acquired by other systems. Preliminary locations are proposed for three events, based on data from the Pioneer… 
γ-Ray burst observations from the UCB/LASL experiment on ISEE-3
Since the discovery of the intense bursts of γ rays by Klebesadel et al.1 in 1973, little progress has been made in the identification of the sources of the bursts. The initial observations provided
High-resolution spectroscopy of gamma-ray bursts
We report on results from the Goddard germanium Gamma-Ray Burst Spectrometer flown on the ISEE-3 spacecraft. Spectral and temporal studies of two events on 4 and 19 November, 1978 are presented. The
Periodicity of the γ-ray transient event of 5 March 1979
An unusual γ-ray burst event was observed on 5 March 1979 by nine different spacecraft1–5. The position of the event has been accurately determined1,2 as α = 5h 25.95 min, δ = −66°07.1′ (epoch
Spectral evolution of the 5 March 1979 γ burst
The γ burst1 of 5 March 1979 was observed by nine experiments2–6 widely spaced on an interplanetary scale allowing an accurate position for a γ-burst source to be determined2,6 for the first time.
An investigation of the possibility of detecting gamma‐ray flashes originating from the atmosphere of Venus
The Runaway Electrons Avalanche Model Monte Carlo simulation is used to study the propagation of runaway electrons and gamma‐ray flashes originating from the atmosphere of Venus, and the possibility
Periodicities in gamma-ray bursts
One of the most recent discoveries on gamma-ray bursts was the fact that one, or possibly two, of them had a pulsed emission with a periodicity of 8 and 4 s. The intensity of successive peaks
Optical search for lightning on Venus
Electrical signals attributed to lightning events on Venus have been observed by instruments aboard Veneras 11 and 12 [Ksanfomaliti, 1980] and aboard the Pioneer Venus Orbiter [Taylor et al., 1979].
Physics of Gamma‐Ray Bursts a
Attention is given to the accumulating evidence for the view that gamma-ray bursts come from strongly magnetic neutron stars, discussing the physical properties of the emission region and the
Gamma-Ray Bursts
We summarize the observed features of γ-ray bursts, with particular emphasis on the cyclotron lines seen in their spectra. We then discuss the theory of cyclotron resonant scattering, and compare the


Observation of a cosmic gamma-ray burst on Apollo 16. I - Temporal variability and energy spectrum
A cosmic gamma-ray event occurring April 27, 1972 at 10.68 UT was observed by gamma-ray and X-ray spectrometers on Apollo 16 as well as by Vela 6A. Analysis has yielded a detailed time profile of the
Observations of Gamma-Ray Bursts of Cosmic Origin
Sixteen short bursts of photons in the energy range 0.2–1.5 MeV have been observed between 1969 July and 1972 July using widely separated spacecraft. Burst durations ranged from less than 0.1 s to
Observations of cosmic gamma-ray bursts with IMP-7: evidence for a single spectrum
Spectral observations of nine recent cosmic gamma-ray bursts are reported. The average photon number spectra of all nine events are each consistent with a 150-keV exponential from 100 keV to about
Grahek of Sandia Laboratories for power supply and ground support equipment design and fabrication
    This study was sponsored jointly by NASA, under contract A-98331A, and the Department of Energy
    • F. J. Wymer of Sandia Laboratories
    • 1979
    Supported in part by NASA contract NAS2-9478 and by the University of Southern Califor-References and Notes
      Wymer of Sandia Laboratories for logics design
        LASL, for data analysis support. We also thank the Pioneer Venus team at Ames Research Center, especially L. Yee and R. B. Pittman for supervision during design and ground testing