Journal article
Discovery of very high energy gamma rays from 1ESÂ 1440+122
Monthly notices of the Royal Astronomical Society, Vol.461(1), pp.202-208
09/01/2016
DOI: 10.1093/mnras/stw1319
Abstract
The BL Lacertae object 1ES 1440+122 was observed in the energy range from 85 GeV to 30 TeV by the VERITAS array of imaging atmospheric Cherenkov telescopes. The observations, taken between 2008 May and 2010 June and totalling 53 h, resulted in the discovery of γ-ray emission from the blazar, which has a redshift z = 0.163. 1ES 1440+122 is detected at a statistical significance of 5.5 standard deviations above the background with an integral flux of (2.8 ± 0.7stat ± 0.8sys) × 10−12 cm−2 s−1 (1.2 per cent of the Crab Nebula's flux) above 200 GeV. The measured spectrum is described well by a power law from 0.2 to 1.3 TeV with a photon index of 3.1 ± 0.4stat ± 0.2sys. Quasi-simultaneous multiwavelength data from the Fermi Large Area Telescope (0.3–300 GeV) and the Swift X-ray Telescope (0.2–10 keV) are additionally used to model the properties of the emission region. A synchrotron self-Compton model produces a good representation of the multiwavelength data. Adding an external-Compton or a hadronic component also adequately describes the data.
Details
- Title: Subtitle
- Discovery of very high energy gamma rays from 1ESÂ 1440+122
- Creators
- S Archambault - McGill UniversityA Archer - Washington University in St. LouisA Barnacka - Harvard UniversityB Behera - Deutsches Elektronen-Synchrotron DESYM Beilicke - Washington University in St. LouisW Benbow - Harvard UniversityK Berger - University of DelawareR Bird - University College DublinM Böttcher - North-West UniversityJ. H Buckley - Washington University in St. LouisV Bugaev - Washington University in St. LouisJ. V Cardenzana - Iowa State UniversityM Cerruti - Harvard UniversityX Chen - University of PotsdamJ. L Christiansen - California Polytechnic State UniversityL Ciupik - Adler PlanetariumE Collins-Hughes - McGill UniversityM. P Connolly - Ollscoil na Gaillimhe – University of GalwayW Cui - Purdue University West LafayetteH. J Dickinson - Iowa State UniversityJ Dumm - University of MinnesotaJ. D Eisch - Iowa State UniversityM Errando - Columbia UniversityA Falcone - Pennsylvania State UniversityS Federici - University of PotsdamQ Feng - Purdue University West LafayetteJ. P Finley - Purdue University West LafayetteH Fleischhack - McGill UniversityL Fortson - University of MinnesotaA Furniss - University of California, Santa CruzG. H Gillanders - Ollscoil na Gaillimhe – University of GalwayS Godambe - Bhabha Atomic Research CentreS Griffin - McGill UniversityS. T Griffiths - University of IowaJ Grube - Adler PlanetariumG Gyuk - Adler PlanetariumN Håkansson - University of PotsdamD Hanna - McGill UniversityJ Holder - University of DelawareG Hughes - McGill UniversityC. A Johnson - University of California, Santa CruzP Kaaret - University of IowaP Kar - University of UtahM Kertzman - DePauw UniversityY Khassen - University College DublinD Kieda - University of UtahH Krawczynski - Washington University in St. LouisS Kumar - University of DelawareM. J Lang - Ollscoil na Gaillimhe – University of GalwayA. S Madhavan - Iowa State UniversityG Maier - McGill UniversityS McArthur - University of ChicagoA McCann - University of ChicagoK Meagher - Georgia Institute of TechnologyJ Millis - Anderson University - IndianaP Moriarty - Galway-Mayo Institute of TechnologyT Nelson - McGill UniversityD Nieto - Columbia UniversityA O’Faoláin de Bhróithe - McGill UniversityR. A Ong - University of California, Los AngelesA. N Otte - Georgia Institute of TechnologyN Park - University of ChicagoJ. S Perkins - Goddard Space Flight CenterM Pohl - University of PotsdamA Popkow - University of California, Los AngelesH Prokoph - McGill UniversityE Pueschel - University College DublinJ Quinn - University College DublinK Ragan - McGill UniversityJ Rajotte - McGill UniversityL. C Reyes - California Polytechnic State UniversityP. T Reynolds - Cork Institute of TechnologyG. T Richards - Georgia Institute of TechnologyE Roache - Harvard UniversityG. H Sembroski - Purdue University West LafayetteK Shahinyan - University of MinnesotaA. W Smith - University of UtahD Staszak - McGill UniversityK Sweeney - Ohio UniversityI Telezhinsky - University of PotsdamJ. V Tucci - Purdue University West LafayetteJ Tyler - McGill UniversityA Varlotta - Purdue University West LafayetteV. V Vassiliev - McGill UniversityS. P Wakely - University of ChicagoR Welsing - McGill UniversityA Wilhelm - University of PotsdamD. A Williams - University of California, Santa CruzB Zitzer - Argonne National Laboratory
- Resource Type
- Journal article
- Publication Details
- Monthly notices of the Royal Astronomical Society, Vol.461(1), pp.202-208
- DOI
- 10.1093/mnras/stw1319
- ISSN
- 0035-8711
- eISSN
- 1365-2966
- Publisher
- Oxford University Press
- Language
- English
- Date published
- 09/01/2016
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199805102771
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