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Pregled bibliografske jedinice broj: 508590

Časopis

Autori: Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Lelas, Damir; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Terzić, Tomislav; ... Zanin, R.
Naslov: A search for Very High Energy gamma-ray emission from Sco X-1 with the MAGIC telescopes
Izvornik: The Astrophysical journal. Supplement series (0067-0049) 735 (2011); L5-1-L5-5
Vrsta rada: članak
Ključne riječi: acceleration of particles — X-rays: binaries — Stars: individual (Sco X-1) — Gamma rays: stars
Sažetak:
The acceleration of particles up to GeV or higher energies in microquasars has been the subject of considerable theoretical and observational efforts in the past few years. Sco X-1 is a microquasar from which evidence of highly energetic particles in the jet has been found when it is in the so-called Horizontal Branch, a state when accretion is lower and a powerful relativistic jet is present. Here we present the first very high energy gamma-ray observations of Sco X-1 obtained with the MAGIC telescopes. An analysis of the whole dataset does not yield a significant signal, with 95% CL flux upper limits above 300 GeV at the level of 2.4x10^{; ; ; ; ; -12}; ; ; ; ; ph/cm^2/s. Simultaneous RXTE observations were conducted to search for TeV emission during particular X- ray states of the source. A selection of the gamma-ray data obtained during the Horizontal Branch based on the X-ray colors did not yield a signal either, with an upper limit of 3.4x10^{; ; ; ; ; -12}; ; ; ; ; ph/cm^2/s. These upper limits place a constraint on the maximum TeV luminosity to non-thermal X-ray luminosity of L_{; ; ; ; ; VHE}; ; ; ; ; /L_{; ; ; ; ; ntX}; ; ; ; ; <0.02, that can be related to a maximum TeV luminosity to jet power ratio of L_{; ; ; ; ; VHE}; ; ; ; ; /L_{; ; ; ; ; j}; ; ; ; ; <10^{; ; ; ; ; -3}; ; ; ; ; . Our upper limits indicate that the underlying high-energy emission physics in Sco X-1 must be inherently different to that of the hitherto detected gamma-ray binaries.
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: 508590.ScoX-1v2.pdf (tekst priložen 9. Lip. 2011. u 14:27 sati)
URL Internet adrese: http://fulir.irb.hr/1414/
http://iopscience.iop.org/2041-8205/735/1/L5/
http://xxx.lanl.gov/abs/1103.5677v2
Broj citata:
Altmetric:
DOI: 10.1088/2041-8205/735/1/L5
URL cjelovitog teksta: http://fulir.irb.hr/1414/
Google Scholar: A search for Very High Energy gamma-ray emission from Sco X-1 with the MAGIC telescopes
Upisao u CROSBI: dhrupec@irb.hr (dhrupec@irb.hr), 1. Tra. 2011. u 01:04 sati



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