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Gamma rays from dark clouds.

Feitzinger, J. V.; Stuewe, J. A.

The distribution of dark clouds and the COS-B X-ray observations of the local interstellar medium at intermediate galactic latitudes are compared. The dark cloud catalog of Lynds (1962) is combined with the complementary work of Feitzinger & Stuewe (1986) to obtain a uniform coverage of the medium-latitude sky. A good correlation between the e…

Correlation of gamma-ray fluxes with southern hemisphere CO data.

Manchester, R. N.; Wolfendale, A. W.; Whiteoak, J. B. +3 more

A new radio survey of the C-12O molecule in the Galactic plane covering the longitude range l:294 - 358 deg is compared with the flux of high energy gamma rays in the same region. A good correlation between the two is found, and it is shown that the data are consistent with the hypothesis that most of the gamma-ray flux is produced by the cosmic-r…

Maximum-entropy image processing in gamma-ray astronomy.

Strong, A. W.; Bennett, K.; Skilling, J.

In order to make the fullest use of the information contained in data from a spark-chamber telescope, an image processing approach, is required. It is shown how the maximum-entropy reconstruction technique can be applied in a modification appropriate to a situation of low statistical weight per resolution solid angle, as usually occurs with presen…

Gamma rays from the Cygnus region and the nature of CG 78+1.

Strong, A. W.; Wolfendale, A. W.; Protheroe, R. J.

Interpretation of the galactic gamma-ray flux above 100 MeV has been complicated by the presence of a component due to 'point' sources of gamma-rays and by the lack of measurements of the molecular hydrogen (except along the galactic equator) which forms a large fraction of the interstellar medium (ISM). Recent CO observations of the Cygnus X regi…

A geometrical analysis of the gamma-ray light curves of pulsars.

Massaro, E.; Buccheri, R.; Salvati, M.

In the light curves of the COS-B gamma-ray pulsars, some common features are clearly recognizable; two main peaks always occur, and the intervening phase lag has not the natural value of 0.5. An interpretation is proposed which only involves a simplified geometrical description of the emission pattern, viz. two opposite hollow cones with a first-o…