Analysis of systematic errors of the ASM/RXTE monitor and GT-48 γ-ray telescope

Details Analysis of systematic errors of the ASM/RXTE monitor and GT-48 γ-ray telescope Analysis of systematic errors of the ASM/RXTE monitor and GT-48 γ-ray telescope

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011bcrao.107...20f&link_type=abstract

Bulletin of the Crimean Astrophysical Observatory, Volume 107, Issue 1, pp.20-24

Astronomy and Astrophysics

Astrophysics

X-Ray And Very-High-Energy Γ-Ray Emission, Supernovae Remnants, Ob-Associations

Scientific paper

The observational data concerning variations of light curves of supernovae remnants—the Crab Nebula, Cassiopeia A, Tycho Brahe, and pulsar Vela—over 14 days scale that may be attributed to systematic errors of the ASM/RXTE monitor are presented. The experimental systematic errors of the GT-48 γ-ray telescope in the mono mode of operation were also determined. For this the observational data of TeV J2032 + 4130 (Cyg γ-2, according to the Crimean version) were used and the stationary nature of its γ-ray emission was confirmed by long-term observations performed with HEGRA and MAGIC. The results of research allow us to draw the following conclusions: (1) light curves of supernovae remnants averaged for long observing periods have false statistically significant flux variations, (2) the level of systematic errors is proportional to the registered flux and decreases with increasing temporal scale of averaging, (3) the light curves of sources may be modulated by the year period, and (4) the systematic errors of the GT-48 γ-ray telescope, in the amount caused by observations in the mono mode and data processing with the stereo-algorithm come to 0.12 min-1.

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