Semantic Scholar Open Access 2015 123 sitasi

Teraelectronvolt pulsed emission from the Crab pulsar detected by MAGIC

M. C. S. Ansoldi L. A. Antonelli P. Antoranz A. Babić P. Bangale +256 lainnya

Abstrak

Aims. We investigate the extension of the very high-energy spectral tail of the Crab Pulsar at energies above 400 GeV. Methods. We analyzed ~320 h of good-quality Crab data obtained with the MAGIC telescope from February 2007 to April 2014. Results. We report the most energetic pulsed emission ever detected from the Crab Pulsar reaching up to 1.5 TeV. The pulse profile shows two narrow peaks synchronized with those measured in the GeV energy range. The spectra of the two peaks follow two different power-law functions from 70 GeV up to 1.5 TeV and connect smoothly with the spectra measured above 10 GeV by the Large Area Telescope (LAT) on board the Fermi satellite. When making a joint fit of the LAT and MAGIC data above 10 GeV the photon indices of the spectra differ by 0.5 ± 0.1. Conclusions. Using data from the MAGIC telescopes we measured the most energetic pulsed photons from a pulsar to date. Such TeV pulsed photons require a parent population of electrons with a Lorentz factor of at least 5 × 106. These results strongly suggest IC scattering off low-energy photons as the emission mechanism and a gamma-ray production region in the vicinity of the light cylinder.

Topik & Kata Kunci

Penulis (261)

M

M. C. S. Ansoldi

L

L. A. Antonelli

P

P. Antoranz

A

A. Babić

P

P. Bangale

U

U. D. Almeida

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Italy.

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U. Siena

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E. Laguna

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University of L'od'z

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D. Zeuthen

I

Institut de F'isica d'Altes Energies

T

T. Z. F. O. Science

T

Technology

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Campus Uab

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08193 Bellaterra

U

U. Wurzburg

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D-97074 Wurzburg

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U. Padova

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Centro de Investigaciones Energ'eticas

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Medioambientales y Tecnol'ogicas

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E. Barcelona

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Technische Universitat Dortmund

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D. Dortmund

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Unitat de F'isica de les Radiacions

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Departament de F'isica

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CERES-IEEC

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U. Barcelona

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E-08193 Bellaterra

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U. Barcelona

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Icc

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IEEC-UB

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E. Barcelona

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Japanese Magic Consortium

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Icrr

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T. U. O. Tokyo

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D. Physics

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Hakubi Center

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The University of Tokushima

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Japan.

F

Finnish Magic Consortium

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T. Observatory

U

U. Turku

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U. Oulu

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Finland.

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Inst. for Nucl. Research

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Nucl. Energy

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BG-1784 Sofia

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Bulgaria.

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U. Pisa

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I. Pisa

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Icrea

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Now at Centro Brasileiro de Pesquisas F'isicas

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R. Sigaud

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150 - Urca

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RJ RiodeJaneiro-

2

22290-180

B

Brazil

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now at Nasa Goddard Space Flight Center

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Greenbelt

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MD 20771

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Usa

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D. O. Astronomy

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U. Maryland

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College Park

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MD 20742

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15 InstitutfurPhysikNewtonstr.

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12489 Berlin Germany

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N. C. E. P. F. D. Lausanne

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now at Department of PhysicsAstronomy

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Now at Institut fur Astro- und Teilchenphysik

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also at Japanese Magic Consortium

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also at INAF-Trieste

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A. M. C. F. Astrophysics

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1290

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Versoix

Format Sitasi

Ansoldi, M.C.S., Antonelli, L.A., Antoranz, P., Babić, A., Bangale, P., Almeida, U.D. et al. (2015). Teraelectronvolt pulsed emission from the Crab pulsar detected by MAGIC. https://doi.org/10.1051/0004-6361/201526853

Akses Cepat

Lihat di Sumber doi.org/10.1051/0004-6361/201526853
Informasi Jurnal
Tahun Terbit
2015
Bahasa
en
Total Sitasi
123×
Sumber Database
Semantic Scholar
DOI
10.1051/0004-6361/201526853
Akses
Open Access ✓