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Observations of the Crab pulsar between 25 and 100 GeV with the MAGIC I telescope


Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ... et al.
Observations of the Crab pulsar between 25 and 100 GeV with the MAGIC I telescope // The Astrophysical journal, 742 (2011), 43-1 doi:10.1088/0004-637X/742/1/43 (međunarodna recenzija, članak, znanstveni)


Naslov
Observations of the Crab pulsar between 25 and 100 GeV with the MAGIC I telescope

Autori
Aleksić, Jelena ; ... ; Dominis Prester, Dijana ; ... ; Ferenc, Daniel ; ... ; Godinović, Nikola ; ... ; Hrupec, Dario ; ... ; Lelas, Damir ; ... ; Puljak, Ivica ; ... ; Surić, Tihomir ; ... ; Šnidarić, Iva ; ... ; Terzić, Tomislav ; ... ; Hirotani, K.

Izvornik
The Astrophysical journal (0004-637X) 742 (2011); 43-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Gamma rays: stars; pulsars: individual (Crab pulsar; PSR B0531+21)

Sažetak
We report on the observation of gamma-rays above 25 GeV from the Crab pulsar (PSR B0532+21) using the MAGIC I telescope. Two data sets from observations during the winter period 2007/2008 and 2008/2009 are used. In order to discuss the spectral shape from 100 MeV to 100 GeV, one year of public Fermi Large Area Telescope (Fermi-LAT) data are also analyzed to complement the MAGIC data. The extrapolation of the exponential cutoff spectrum determined with the Fermi-LAT data is inconsistent with MAGIC measurements, which requires a modification of the standard pulsar emission models. In the energy region between 25 and 100 GeV, the emission in the P1 phase (from −0.06 to 0.04, location of the main pulse) and the P2 phase (from 0.32 to 0.43, location of the interpulse) can be described by power laws with spectral indices of −3.1 +- 1.0stat +- 0.3syst and −3.5 +- 0.5stat +- 0.3syst, respectively. Assuming an asymmetric Lorentzian for the pulse shape, the peak positions of the main pulse and the interpulse are estimated to be at phases −0.009 +- 0.007 and 0.393 +- 0.009, while the while the full widths at half maximum are 0.025 +- 0.008 and 0.053 +- 0.015, respectively.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
098-0982931-2875 - Foton-atom međudjelovanje i korelacije (Tihomir Surić, )
HRZZ-02.01/12 - Astročestična fizika u Hrvatskoj - razvoj tehnološke baze i višeinstitucionalne suradnje kao preduvjeta za ravnopravno djelovanje u novim međunarodnim projektima (Daniel Ferenc, )

Ustanove
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Institut "Ruđer Bošković", Zagreb,
Sveučilište u Rijeci - Odjel za fiziku

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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