Napredna pretraga

Pregled bibliografske jedinice broj: 517840

Detection of the gamma-ray binary LS I +61 303 in a low flux state at Very High Energy gamma- rays with the MAGIC Telesopes in 2009


Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ... et al.
Detection of the gamma-ray binary LS I +61 303 in a low flux state at Very High Energy gamma- rays with the MAGIC Telesopes in 2009 // The Astrophysical journal, 746 (2012), 80; 1-6 doi:10.1088/0004-637X/746/1/80 (međunarodna recenzija, članak, znanstveni)


Naslov
Detection of the gamma-ray binary LS I +61 303 in a low flux state at Very High Energy gamma- rays with the MAGIC Telesopes in 2009

Autori
Aleksić, Jelena ; ... ; Dominis Prester, Dijana ; ... ; Ferenc, Daniel ; ... ; Godinović, Nikola ; ... ; Hrupec, Dario ; ... ; Lelas, Damir ; ... ; Puljak, Ivica ; ... ; Surić, Tihomir ; ... ; Terzić, Tomislav ; ... ; Zanin, R.

Izvornik
The Astrophysical journal (0004-637X) 746 (2012), 80; 1-6

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

Ključne riječi
Binaries: general; gamma rays: observations; stars: emission-line; stars: individual (LS I +61 303); X-rays: binaries; X-rays: individual (LS I +61 303)

Sažetak
We present very high energy (VHE, E > 100 GeV) gamma-ray observations of the high mass X-ray binary system LS I +61 303 obtained with the MAGIC stereo system between 2009 October and 2010 January. We detect a 6.3 sigma gamma-ray signal above 400 GeV in the combined data set. The integral flux above an energy of 300 GeV is F (E > 300 GeV) = (1.4 +- 0.3 stat +- 0.4 syst) * 10^(−12) cm^(−2) s^(−1) , which corresponds to about 1.3% of the Crab Nebula flux in the same energy range. The orbit-averaged flux of LS I +61 303 in the orbital phase interval 0.6– 0.7, where there is a maximum of the TeV flux, is lower by almost an order of magnitude compared to our previous measurements between 2005 September and 2008 January. This provides evidence for a new low emission state in LS I +61 303. We find that the change in the emission state can not be explained by an increase of photon-photon absorption around the compact star.

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


Citati