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Pregled bibliografske jedinice broj: 523498

Časopis

Autori: Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Lelas, Damir; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Šnidarić, Iva; ...; Terzić, Tomislav; ...; Hirotani, K.
Naslov: Observations of the Crab pulsar between 25 and 100 GeV with the MAGIC I telescope
Izvornik: The Astrophysical journal (0004-637X) 742 (2011); 43-1-43-14
Vrsta rada: članak
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.
Projekt / tema: 098-0982931-2875, HRZZ-02.01/12
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
Puni text rada: 523498.crab_25GeV_mono_v3.pdf (tekst priložen 16. Stu. 2011. u 22:48 sati)
URL Internet adrese: http://fulir.irb.hr/1439/
http://arxiv.org/abs/1108.5391v3
http://iopscience.iop.org/0004-637X/742/1/43
Broj citata:
Altmetric:
DOI: 10.1088/0004-637X/742/1/43
URL cjelovitog teksta: http://fulir.irb.hr/1439/
Google Scholar: Observations of the Crab pulsar between 25 and 100 GeV with the MAGIC I telescope
Upisao u CROSBI: dhrupec@irb.hr (dhrupec@irb.hr), 30. Kol. 2011. u 09:50 sati



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