Astronomy and Astrophysics – Astrophysics – Instrumentation and Methods for Astrophysics
Scientific paper
2009-12-18
Astronomy and Astrophysics
Astrophysics
Instrumentation and Methods for Astrophysics
2009 Fermi Symposium, eConf Proceedings C091122, 5 pages, 5 figures, 3 tables
Scientific paper
An updated model for the synchrotron and inverse Compton emission from a population of high energy electrons of the Crab Nebula is used to reproduce the measured spectral energy distribution from radio to high energy gamma-rays. By comparing the predicted inverse Compton component with recent Fermi measurements of the nebula's emission, it is possible to determine the average magnetic field in the nebula and to derive the underlying electron energy distribution. The model calculation can then be used to cross calibrate the Fermi observations with ground based air shower measurements. The resulting energy calibration factors are derived and can be used for combining broad energy measurements taken with Fermi in conjunction with ground based measurements.
Horns Dieter
Meyer Martin
Zechlin Hannes-Sebastian
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