Add to ORKGA signal (chance probability = .0002) with the 1.24 s period of Hercules X-1 has been observed using the Utah Fly's Eye. The signal's relatively long period and high shower energy conflict with some popular models of particle acceleration by pulsars. Optical and X-ray data suggest a picture in which energetic particles produce multi-TeV gamma rays by collisions with Hercules X-1's accretion disk
This thesis describes the observation of a number of astronomical objects using the University of Du...
The Geminga (2 CG 195+04) which exhibits a periodicity with a period of 59 to 60 s in its emission o...
Pulse phase-dependent spectral changes in the high energy (less than 20 keV) continuum of Hercules X...
A signal (chance probability = 2 x 10-4) with a 1.24 s period has been observed from the direction o...
An outburst of gamma rays with energies E gamma 10 to the 12th power eV was recently detected from ...
The 1.24 second binary pulsar Her X-1, first observed in X-rays in 1971 by UHURU has now been seen a...
We observed a large increase in the trigger rate in the direction of Hercules X-1 in the Atmospheric...
Typescript.Thesis (Ph. D.)--University of Hawaii at Manoa, 1991.Includes bibliographical references ...
The 6-18 keV and the 40-60 keV X-ray spectrum of Hercules X-1 were simultaneously observed with the ...
Data from the University of Adelaide air shower array at Buckland Park taken over a three year perio...
Following the discovery of Her X-1 as a source of pulsed 1000 Gev X-rays, a search for emission from...
Flux limits in the range 10 to the minus 13th power-10 to the minus 12 power/sq cm/s have been obtai...
The X-ray spectrum of Hercules X-1 was observed in the energy range 2-24 keV with sufficient tempora...
It is now more than 20 years since the first ground based gamma ray experiments involving atmospheri...
The Haverah Park 50 m water-Cerenkov array has been used to examine a number of periodic sources for...
This thesis describes the observation of a number of astronomical objects using the University of Du...
The Geminga (2 CG 195+04) which exhibits a periodicity with a period of 59 to 60 s in its emission o...
Pulse phase-dependent spectral changes in the high energy (less than 20 keV) continuum of Hercules X...
A signal (chance probability = 2 x 10-4) with a 1.24 s period has been observed from the direction o...
An outburst of gamma rays with energies E gamma 10 to the 12th power eV was recently detected from ...
The 1.24 second binary pulsar Her X-1, first observed in X-rays in 1971 by UHURU has now been seen a...
We observed a large increase in the trigger rate in the direction of Hercules X-1 in the Atmospheric...
Typescript.Thesis (Ph. D.)--University of Hawaii at Manoa, 1991.Includes bibliographical references ...
The 6-18 keV and the 40-60 keV X-ray spectrum of Hercules X-1 were simultaneously observed with the ...
Data from the University of Adelaide air shower array at Buckland Park taken over a three year perio...
Following the discovery of Her X-1 as a source of pulsed 1000 Gev X-rays, a search for emission from...
Flux limits in the range 10 to the minus 13th power-10 to the minus 12 power/sq cm/s have been obtai...
The X-ray spectrum of Hercules X-1 was observed in the energy range 2-24 keV with sufficient tempora...
It is now more than 20 years since the first ground based gamma ray experiments involving atmospheri...
The Haverah Park 50 m water-Cerenkov array has been used to examine a number of periodic sources for...
This thesis describes the observation of a number of astronomical objects using the University of Du...
The Geminga (2 CG 195+04) which exhibits a periodicity with a period of 59 to 60 s in its emission o...
Pulse phase-dependent spectral changes in the high energy (less than 20 keV) continuum of Hercules X...