High Energy Observation Of The Crab With Integral/SPI

Details High Energy Observation Of The Crab With Integral/SPI High Energy Observation Of The Crab With Integral/SPI

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.1614j&link_type=abstract

American Astronomical Society, HEAD meeting #11, #16.14; Bulletin of the American Astronomical Society, Vol. 41, p.681

Astronomy and Astrophysics

Astronomy

Scientific paper

The Crab Nebula and its pulsar have been regularly observed by SPI/Integral. We report on these observations distributed over 7 years and investigate on the intensity and spectral shape of this remarkable source. We present an absolute spectrum which excludes a single power law model. While the spectrum can be represented by a broken power law model, the result suggests a gradual softening of the spectral shape with the energy.
Concerning the pulsar we have investigated the pulse shape evolution in the hard X-ray domain and studied the phase alignment with the radio. We found that the delay between the radio and the X-rays varies in the 2-300 keV energy range.

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