Contamination of observations of cosmic sources with the solar radiation

Details Contamination of observations of cosmic sources with the solar radiation Contamination of observations of cosmic sources with the solar radiation

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998atsir1557...23k&link_type=abstract

Astronomicheskij Tsirkulyar, no. 1557

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Scientific paper

A comparison of variations of cosmic sources in UV-, X- and gamma-rays with those of the solar activity reveals the evident similarity, which suggests a possibility of light-receivers contamination with solar radiation. These phenomena were noticed by us in the observations of NGC 5548, NGC 4151, 1E 1740-29, 3C 279, Crab Nebula and others. The effect may be explained by impact of high energy particle fluxes from the Sun active regions on gamma-ray receivers. The gamma-ray variation time-lag in respect to that of W numbers permits an estimation of the velocity of the high energy particle drift from the Sun to the Earth (~200 km/s). So the 1 month-scale variability of the observed gamma ray sources may be subject to doubts.

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