Phase-resolved Crab pulsar measurements from 25 to 400 GeV with the MAGIC telescopes

Details Phase-resolved Crab pulsar measurements from 25 to 400 GeV with the MAGIC telescopes Phase-resolved Crab pulsar measurements from 25 to 400 GeV with the MAGIC telescopes

2012-02-14

arxiv.org/abs/1202.3008v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 2 figures, Proc. TAUP 2011, submitted for publication in JCPS

Scientific paper

We report on observations of the Crab pulsar with the MAGIC telescopes. Our data were taken in both monoscopic (> 25GeV) and stereoscopic (> 50GeV) observation modes. Two peaks were detected with both modes and phase-resolved energy spectra were calculated. By comparing with Fermi- LAT measurements, we find that the energy spectrum of the Crab pulsar does not follow a power law with an exponential cutoff, but has an additional hard component, extending up to at least 400 GeV. This suggests that the emission above 25 GeV is not dominated by curvature radiation, as suggested in the standard scenarios of the OG and SG models.

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