Study of the Crab Pulsar with the IBIS Compton Mode Data

Details Study of the Crab Pulsar with the IBIS Compton Mode Data Study of the Crab Pulsar with the IBIS Compton Mode Data

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.552..463f&link_type=abstract

Proceedings of the 5th INTEGRAL Workshop on the INTEGRAL Universe (ESA SP-552). 16-20 February 2004, Munich, Germany. Scientific

Astronomy and Astrophysics

Astrophysics

Scientific paper

The INTEGRAL IBIS instrument is a coded aper- ture telescope with a dual detection layer operat- ing in the range 15 keV - 10 MeV. In the IBIS Compton Mode, true Compton scatterings appear as two events detected into the two independent detec- tors ISGRI(CdTe) and PICSIT(CsI) during a short time window, the coincidence window. By study- ing Compton events, images can be constructed and polarization and temporal analysis of astrophysical sources can be performed. In this contribution we present the latest results of the IBIS Compton mode applied to Crab observa- tions. After a short presentation of the IBIS Comp- ton mode we discuss the energy resolution and the localization of spurious events in the coscos diagram. Then we show how to improve the signal to noise ra- tio of the Crab applying selections using rise time and scatter angle informations. Finally an image of the Crab in Compton mode will be presented. Key words: Pulsar ; Compton ; Integral.

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