Using the trial source method for the analysis of the influence of apparatus errors on data obtained by the VHE imaging cerenkov detectors

Details Using the trial source method for the analysis of the influence of apparatus errors on data obtained by the VHE imaging cerenkov detectors Using the trial source method for the analysis of the influence of apparatus errors on data obtained by the VHE imaging cerenkov detectors

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994exa.....5..405n&link_type=abstract

Experimental Astronomy, Volume 5, Issue 3-4, pp. 405-418

Astronomy and Astrophysics

Astronomy

11

Vhe Gamma-Astronomy, Observational Data Treating Method

Scientific paper

The results of application of the trial source method for the analysis of data obtained using a VHE gamma-ray telescope with an imaging camera are presented. This method was proposed by the Whipple Collaboration in 1991. The usage of this method gives us the possibility of the more accurate determination of the direction to the source. In consequence, more accurate definition of the source direction helps us to make more confident identification of the VHE gamma-ray source and to find more accurate value of the gamma-ray flux. The three-dimensional histograms show that the position of an off-axis source is shifted towards the camera edge and the height of the peak (i.e.the efficiency of the detection) decreases in this case. The calculated histograms obtained for the case of a bright star in the camera field of view show that a spurious source appears in the direction of the star. The trial source method gives us the possibility of distinguishing the real gamma-ray source from a spurious one.

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