Search Publications
COS-B upper limits on gamma-ray emission from radio pulsars.
Caraveo, P. A.; Bignami, G. F.; Strong, A. W. +13 more
The authors report on the results of a search for pulsed gamma-ray emission from old radio pulsars in the COS-B data in the energy range 50 MeV to 2 GeV. The analysis has been done by using either pulsar parameters obtained in simultaneous radio and gamma-ray observations or parameters which could be reliably derived by interpolation from radio ob…
Further COS-B evidence for gamma-ray emission from 3C273
Caraveo, P. A.; Bignami, G. F.; Hermsen, W. +7 more
The results of a third observation of the Virgo region of the sky by the ESA gamma-ray satellite COS-B are reported. The gamma-ray source (CG291 plus 65) was again seen, and the combined data are analyzed to improve on the position and time-averaged energy spectrum of the source. During the observation, the number of photons from the instrumental …
Observation by COS-B of the gamma-ray source 2CG195/plus/04
Caraveo, P. A.; Bignami, G. F.; Hermsen, W. +7 more
Data accumulated from observations of the high-energy gamma-ray source 2CG195(plus)04 are used to improve the position and energy spectrum of the source, and to search for short term variability. Skymaps from four observations in three energy ranges are analyzed using the cross-correlation method by Hermsen (1980), and results are within the error…
On a more extended correlation between COS-B gamma rays and interstellar matter in the Orion region
Caraveo, P. A.; Bignami, G. F.; Hermsen, W. +7 more
COS-B observations of gamma-ray emission from local galactic features
Caraveo, P. A.; Bignami, G. F.; Hermsen, W. +7 more
Evidence for large scale correlations between the high-energy photon sky and the known local distribution of diffuse interstellar matter is discussed. Evidence is presented of correlations with the Gould's Belt and the Dolidze Belt. The correlations indicate that the emission of gamma rays at medium latitudes can be explained by the distribution o…
History of the gamma-ray light curves of the pulsars PSR0531 plus 21 and PSR0833-45 as measured by COS-B
Caraveo, P. A.; Bignami, G. F.; Hermsen, W. +7 more
Evidence in the COS-B data for time-variable gamma-ray sources in the galactic plane
Caraveo, P. A.; Strong, A. W.; Hermsen, W. +7 more
Gamma Rays from Specific Molecular Clouds
Wolfendale, A. W.; Li, Ti-Pei; Issa, M. R. +1 more
The characteristics of specific local molecular clouds which may be visible in gamma-rays are examined. Data from the SAS II and COS B satellites are used to derive observed gamma-ray fluxes and flux limits. Conversions are made to a standard energy threshold of 100 MeV, and averages are taken. Results show that on the average, not much enhancemen…
COS-B gamma-ray measurements, cosmic rays and the local interstellar medium
Caraveo, P. A.; Bignami, G. F.; Strong, A. W. +6 more
The results of COS-B gamma ray, cosmic ray, and the local interstellar medium measurements are summarized, with particular regard for H I emissions at galactic longitude 240 deg. Significant quantities of atomic hydrogen are calculated from the local gamma ray emissivity, and the gamma ray emissivity spectrum is deconvolved from equations of the e…
New large-scale properties of the galactic gamma radiation observed by COS-B in the context of the diffuse emission within the galactic disc
Caraveo, P. A.; Bignami, G. F.; Hermsen, W. +7 more