Journal article
Firstnustarobservations of mrk 501 within a radio to tev multi-instrument campaign
The Astrophysical Journal
09 Oct 2015
Abstract
We report on simultaneous broadband observations of the TeV-emitting blazar Markarian 501 between 2013 April 1 and August 10, 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, 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 Light Detection and Ranging (LIDAR) 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 (SED) 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) show evidence of the onset of inverse-Compton emission at hard X-ray energies. We apply a single-zone equilibrium synchrotron self-Compton (SSC) model to five simultaneous broadband SEDs. We find that the SSC 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.
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66 citations in Scopus
Details
- Title
- Firstnustarobservations of mrk 501 within a radio to tev multi-instrument campaign
- Creators
- A Furniss - Stanford UniversityK Noda - Max Planck SocietyS Boggs - University of California, BerkeleyJ Chiang - Stanford UniversityF Christensen - Technical University of DenmarkW Craig - University of California, BerkeleyP GiommiC Hailey - Columbia UniversityF Harisson - California Institute of TechnologyG Madejski - Stanford UniversityK Nalewajko - Stanford UniversityM PerriD Stern - California Institute of TechnologyM UrryF VerrecchiaW Zhang - Goddard Space Flight CenterM. L AhnenS Ansoldi - University of UdineL. A AntonelliP Antoranz - University of SienaA Babic - University of SplitB Banerjee - Saha Institute of Nuclear PhysicsP Bangale - Max Planck SocietyU Barres de AlmeidaJ A. BarrioJ Becerra GonzálezW BednarekE Bernardini - Humboldt-Universität zu BerlinB Biasuzzi - University of UdineA Biland - ETH ZurichO Blanch - Autonomous University of BarcelonaS Bonnefoy - Complutense University of MadridG BonnoliF Borracci - Max Planck SocietyT Bretz - École Polytechnique Fédérale de LausanneE CarmonaA CarosiA Chatterjee - Saha Institute of Nuclear PhysicsR Clavero - Spanish National Research CouncilP Colin - Max Planck SocietyE Colombo - Spanish National Research CouncilJ. L Contreras - Complutense University of MadridJ Cortina - Autonomous University of BarcelonaS CovinoP Da Vela - University of SienaF Dazzi - Max Planck SocietyA De Angelis - University of PaduaG De CanevaB De Lotto - University of UdineE de Oña Wilhelmi - Spanish National Research CouncilC Delgado MendezF Di PierroD Dominis PresterD Dorner - University of WürzburgM Doro - University of PaduaS EineckeD Eisenacher GlawionD Elsaesser - University of WürzburgA Fernández-Barral - Autonomous University of BarcelonaD Fidalgo - Complutense University of MadridM. V Fonseca - Complutense University of MadridL Font - Autonomous University of BarcelonaK FrantzenC Fruck - Max Planck SocietyD Galindo - University of BarcelonaR. J García LópezM GarczarczykD Garrido TerratsM Gaug - Autonomous University of BarcelonaP GiammariaN Godinovic´A González MuñozD Guberman - Autonomous University of BarcelonaY Hanabata - University of TokyoM Hayashida - University of TokyoJ Herrera - Spanish National Research CouncilJ Hose - Max Planck SocietyD Hrupec - University of SplitG Hughes - ETH ZurichW IdecH Kellermann - Max Planck SocietyK Kodani - University of TokyoY Konno - University of TokyoH Kubo - University of TokyoJ Kushida - University of TokyoA La BarberaD Lelas - University of SplitN Lewandowska - University of WürzburgE Lindfors - University of TurkuS LombardiF Longo - University of UdineM López - Complutense University of MadridR López-Coto - Autonomous University of BarcelonaA López-Oramas - Autonomous University of BarcelonaE Lorenz - Max Planck SocietyP Majumdar - Saha Institute of Nuclear PhysicsM Makariev - Bulgarian Academy of SciencesK MallotG Maneva - Bulgarian Academy of SciencesM Manganaro - Spanish National Research CouncilK Mannheim - University of WürzburgL MaraschiB Marcote - University of BarcelonaM Mariotti - University of PaduaM Martínez - Autonomous University of BarcelonaD Mazin - Max Planck SocietyU Menzel - Max Planck SocietyJ. M Miranda - University of SienaR Mirzoyan - Max Planck SocietyA Moralejo - Autonomous University of BarcelonaD Nakajima - University of TokyoV Neustroev - University of TurkuA NiedzwieckiM Nievas RosilloK Nilsson - University of TurkuK Nishijima - University of TokyoR Orito - University of TokyoA OverkempingS Paiano - University of PaduaJ Palacio - Autonomous University of BarcelonaM Palatiello - University of UdineD Paneque - Max Planck SocietyR Paoletti - University of SienaJ. M Paredes - University of BarcelonaX Paredes-Fortuny - University of BarcelonaM Persic - University of UdineJ Poutanen - University of TurkuP. G Prada MoroniE Prandini - ETH ZurichI Puljak - University of SplitR Reinthal - University of TurkuW RhodeM Ribó - University of BarcelonaJ Rico - Autonomous University of BarcelonaJ Rodriguez GarciaT Saito - University of TokyoK Saito - University of TokyoK Satalecka - Complutense University of MadridV Scapin - Complutense University of MadridC Schultz - University of PaduaT SchweizerS. N Shore - University of PisaA SillanpääJ Sitarek - Max Planck SocietyI Snidaric - University of SplitD SobczynskaA StamerraT Steinbring - University of WürzburgM Strzys - Max Planck SocietyL Takalo - University of TurkuH Takami - University of TokyoF TavecchioP Temnikov - Bulgarian Academy of SciencesT Terzic´D Tescaro - Spanish National Research CouncilM Teshima - Max Planck SocietyJ ThaeleD. F TorresT Toyama - Max Planck SocietyA Treves - University of InsubriaV Verguilov - Bulgarian Academy of SciencesI Vovk - Max Planck SocietyM Will - Spanish National Research CouncilR Zanin - University of BarcelonaA Archer - Washington University in St. LouisW Benbow - Harvard UniversityR Bird - University College DublinJ Biteau - University of California, Santa CruzV Bugaev - Washington University in St. LouisJ. V Cardenzana - Iowa State UniversityM Cerruti - Harvard UniversityX Chen - University of PotsdamL Ciupik - Adler PlanetariumM. P Connolly - National University of Ireland, GalwayW Cui - Purdue University West LafayetteH. J Dickinson - Iowa State UniversityJ Dumm - University of MinnesotaJ. D Eisch - Iowa State UniversityA Falcone - Pennsylvania State UniversityQ Feng - Purdue University West LafayetteJ. P Finley - Purdue University West LafayetteH FleischhackP Fortin - Harvard UniversityL Fortson - University of MinnesotaL GerardG. H Gillanders - National University of Ireland, GalwayS Griffin - McGill UniversityS. T Griffiths - University of IowaJ Grube - Adler PlanetariumG Gyuk - Adler PlanetariumN Håkansson - University of PotsdamJ Holder - University of DelawareT. B Humensky - Columbia UniversityC. A Johnson - University of California, Santa CruzP Kaaret - University of IowaM Kertzman - DePauw UniversityD Kieda - University of UtahM KrauseF Krennrich - Iowa State UniversityM. J Lang - National University of Ireland, GalwayT. T. Y Lin - McGill UniversityG MaierS McArthur - University of ChicagoA McCann - University of ChicagoK Meagher - Georgia Institute of TechnologyP Moriarty - National University of Ireland, GalwayR Mukherjee - Columbia UniversityD Nieto - Columbia UniversityA O’Faoláin de BhróitR. A Ong - University of California, Los AngelesN Park - University of ChicagoD Petry - University of BelgradeM Pohl - University of PotsdamA Popkow - University of California, Los AngelesK Ragan - University of UtahG Ratliff - Adler PlanetariumL. C Reyes - California Polytechnic State UniversityP. T ReynoldsG. T Richards - Georgia Institute of TechnologyE Roache - Harvard UniversityM Santander - Columbia UniversityG. H Sembroski - Purdue University West LafayetteK Shahinyan - University of MinnesotaD Staszak - McGill UniversityI Telezhinsky - University of PotsdamJ. V Tucci - Purdue University West LafayetteJ Tyler - University of IowaV. V Vassiliev - University of California, Los AngelesS. P Wakely - University of ChicagoO. M Weiner - Columbia UniversityA WeinsteinA Wilhelm - University of PotsdamD. A Williams - University of California, Santa CruzB Zitzer - Argonne National LaboratoryO Vince - National Central UniversityL Fuhrmann - Max Planck SocietyE Angelakis - Max Planck SocietyV Karamanavis - Max Planck SocietyI Myserlis - Max Planck SocietyT. P Krichbaum - Max Planck SocietyJ. A ZensusH UngerechtsA SieversR Bachev - Bulgarian Academy of SciencesM Böttcher - North-West UniversityW. P Chen - National Central UniversityG Damljanovic - University of BelgradeC Eswaraiah - National Central UniversityT Güver - Istanbul UniversityT Hovatta - Aalto UniversityZ Hughes - University of California, Santa CruzS. I Ibryamov - Bulgarian Academy of SciencesM. D Joner - Brigham Young UniversityB Jordan - Dublin Institute For Advanced StudiesS. G Jorstad - Boston UniversityM Joshi - Boston UniversityJ Kataoka - Waseda UniversityO. M Kurtanidze - Kazan Federal UniversityS. O Kurtanidze - Georgian National Academy of SciencesA Lähteenmäki - Aalto UniversityG Latev - Bulgarian Academy of SciencesH. C Lin - National Central UniversityV. M Larionov - St Petersburg UniversityA. A Mokrushina - St Petersburg UniversityD. A Morozova - St Petersburg UniversityM. G Nikolashvili - Georgian National Academy of SciencesC. M RaiteriV Ramakrishnan - Aalto UniversityA. C R. ReadheadA. C Sadun - University of Colorado DenverL. A Sigua - Georgian National Academy of SciencesE. H Semkov - Bulgarian Academy of SciencesA Strigachev - Bulgarian Academy of SciencesJ Tammi - Aalto UniversityM Tornikoski - Aalto UniversityY. V Troitskaya - St Petersburg UniversityI. S Troitsky - St Petersburg UniversityM Villata
- Publication Details
- The Astrophysical Journal
- Publisher
- IOP Publishing
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Scopus ID
- 2-s2.0-84946122101
- Other Identifier
- 991019201511404721