研究成果藝廊
Pulsed Gamma-Ray Emission from the Crab Pulsar
圖片來源: Kouichi Hirotani and the MAGIC Collaboration
Figure 15 of "Observations of the Crab pulsar above 25 GeV with the MAGIC I telescope", Aleksic et al. ApJ 742, 43 (2011)
One of the brightest pulsars, the Crab pulsar, has been observed extensively
for more than 40 years in a wide frequency range. Among them, an exciting
finding was recently made by the MAGIC collaboration, which reported the
detection of pulsed signals above 25 GeV (three red diamonds, this work).
The thin, black solid line represents the flux of the photons emitted by
the primary positrons accelerated in the particle accelerator,
while the thin, black dashed one by the secondary pairs created
outside the accelerator.
The thick green solid line (this work) includes magnetospheric absorption
and subsequent reprocesses, and hence represents the flux to be observed.
The filled circles (LECS), open circles (MECS), filled triangles (PDS)
denote the Boppo SAX observations,
while the open triangles the Gamma-ray Imaging Spectrometer (GRIS).
The Fermi observations are denoted by filled squares, and
the VERITAS observations by the bowtie.
