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Pregled bibliografske jedinice broj: 780938

Časopis

Autori: Furniss, A.; ...; Babić, Ana; ...; Dominis Prester, Dijana; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Lelas, Damir; ...; Manganaro, Marina; ...; Puljak, Ivica; ...; Šnidarić, Iva; ...; Terzić, Tomislav; ...; Villata, V.
Naslov: First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign
Izvornik: The Astrophysical journal (0004-637X) 812 (2015);
Vrsta rada: članak
Ključne riječi: galaxies BL Lacs ; galaxies individual (Markarian 501) ; X-rays
Sažetak:
We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 1 April and 10 August 2013, including the first detailed characterization of the synchrotron peak with Swift and NuSTAR. During the campaign, the nearby BL Lac object was observed in both a quiescent and an elevated state. The broadband campaign includes observations with NuSTAR, MAGIC, VERITAS, the Fermi Large Area Telescope (LAT), Swift X-ray Telescope and UV Optical Telescope, various ground-based optical instruments, including the GASP-WEBT program, as well as radio observations by OVRO, Metsahovi and the F-Gamma consortium. Some of the MAGIC observations were affected by a sand layer from the Saharan desert, and had to be corrected using event-by-event corrections derived with a LIDAR (LIght Detection And Ranging) facility. This is the first time that LIDAR information is used to produce a physics result with Cherenkov Telescope data taken during adverse atmospheric conditions, and hence sets a precedent for the current and future ground-based gamma-ray instruments. The NuSTAR instrument provides unprecedented sensitivity in hard X-rays, showing the source to display a spectral energy distribution between 3 and 79 keV consistent with a log-parabolic spectrum and hard X-ray variability on hour timescales. None (of the four extended NuSTAR observations) shows evidence of the onset of inverse-Compton emission at hard X-ray energies. We apply a single-zone equilibrium synchrotron self-Compton model to five simultaneous broadband spectral energy distributions. We find that the synchrotron self-Compton model can reproduce the observed broadband states through a decrease in the magnetic field strength coinciding with an increase in the luminosity and hardness of the relativistic leptons responsible for the high-energy emission.
Projekt / tema: HRZZ-09/176
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: 780938.NuSTAR_Mrk501_v2.pdf (tekst priložen 11. Lis. 2015. u 19:30 sati)
URL Internet adrese: http://iopscience.iop.org/article/10.1088/0004-637X/812/1/65
http://arxiv.org/abs/1509.04936v2
Broj citata:
Altmetric:
DOI: 10.1088/0004-637X/812/1/65
URL cjelovitog teksta:
Google Scholar: First NuSTAR Observations of Mrk 501 within a Radio to TeV Multi-Instrument Campaign
Upisao u CROSBI: Dario Hrupec (Dario.Hrupec@irb.hr), 11. Lis. 2015. u 19:30 sati



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