Journal article
A Very High Energy γ-Ray Survey toward the Cygnus Region of the Galaxy
The Astrophysical journal, Vol.861(2), p.134
07/12/2018
DOI: 10.3847/1538-4357/aac4a2
Abstract
We present results from deep observations toward the Cygnus region using 300 hr of very high energy (VHE) γ-ray data taken with the VERITAS Cerenkov telescope array and over 7 yr of high-energy γ-ray data taken with the Fermi satellite at an energy above 1 GeV. As the brightest region of diffuse γ-ray emission in the northern sky, the Cygnus region provides a promising area to probe the origins of cosmic rays. We report the identification of a potential Fermi-LAT counterpart to VER J2031+415 (TeV J2032+4130) and resolve the extended VHE source VER J2019+368 into two source candidates (VER J2018+367* and VER J2020+368*) and characterize their energy spectra. The Fermi-LAT morphology of 3FGL J2021.0+4031e (the Gamma Cygni supernova remnant) was examined, and a region of enhanced emission coincident with VER J2019+407 was identified and jointly fit with the VERITAS data. By modeling 3FGL J2015.6+3709 as two sources, one located at the location of the pulsar wind nebula CTB 87 and one at the quasar QSO J2015+371, a continuous spectrum from 1 GeV to 10 TeV was extracted for VER J2016+371 (CTB 87). An additional 71 locations coincident with Fermi-LAT sources and other potential objects of interest were tested for VHE γ-ray emission, with no emission detected and upper limits on the differential flux placed at an average of 2.3% of the Crab Nebula flux. We interpret these observations in a multiwavelength context and present the most detailed γ-ray view of the region to date.
Details
- Title: Subtitle
- A Very High Energy γ-Ray Survey toward the Cygnus Region of the Galaxy
- Creators
- A. U Abeysekara - University of UtahA Archer - Washington University in St. LouisT Aune - University of California, Los AngelesW Benbow - Harvard UniversityR Bird - University of California, Los AngelesR Brose - University of PotsdamM Buchovecky - University of California, Los AngelesV Bugaev - Washington University in St. LouisW Cui - Purdue University West LafayetteM. K Daniel - Harvard UniversityA Falcone - Pennsylvania State UniversityQ Feng - McGill UniversityJ. P Finley - Purdue University West LafayetteH Fleischhack - DESY, Platanenallee 6, D-15738 Zeuthen, GermanyA Flinders - University of UtahL Fortson - University of MinnesotaA Furniss - California State University, East BayE. V Gotthelf - Columbia UniversityJ Grube - Stevens Institute of TechnologyD Hanna - McGill UniversityO Hervet - University of California, Santa CruzJ Holder - University of DelawareK Huang - University of California, Los AngelesG Hughes - Harvard UniversityT. B Humensky - Columbia UniversityM Hütten - DESY, Platanenallee 6, D-15738 Zeuthen, GermanyC. A Johnson - University of California, Santa CruzP Kaaret - University of IowaP Kar - University of UtahN Kelley-Hoskins - DESY, Platanenallee 6, D-15738 Zeuthen, GermanyM Kertzman - DePauw UniversityD Kieda - University of UtahM Krause - DESY, Platanenallee 6, D-15738 Zeuthen, GermanyS Kumar - University of DelawareM. J Lang - Ollscoil na Gaillimhe – University of GalwayT. T. Y Lin - McGill UniversityG Maier - DESY, Platanenallee 6, D-15738 Zeuthen, GermanyS McArthur - Purdue University West LafayetteP Moriarty - Ollscoil na Gaillimhe – University of GalwayR Mukherjee - Barnard CollegeS O'Brien - University College DublinR. A Ong - University of California, Los AngelesA. N Otte - Georgia Institute of TechnologyD Pandel - Grand Valley State UniversityN Park - University of ChicagoA Petrashyk - Columbia UniversityM Pohl - University of PotsdamA Popkow - University of Hawaiʻi at MānoaE Pueschel - DESY, Platanenallee 6, D-15738 Zeuthen, GermanyJ Quinn - University College DublinK Ragan - McGill UniversityP. T Reynolds - Cork Institute of TechnologyG. T Richards - Georgia Institute of TechnologyE Roache - Harvard UniversityJ Rousselle - University of California, Los AngelesC Rulten - University of MinnesotaI Sadeh - DESY, Platanenallee 6, D-15738 Zeuthen, GermanyM Santander - Barnard CollegeG. H Sembroski - Purdue University West LafayetteK Shahinyan - University of MinnesotaJ Tyler - McGill UniversityV. V Vassiliev - University of California, Los AngelesS. P Wakely - University of ChicagoJ. E Ward - IFAEA Weinstein - Iowa State UniversityR. M Wells - Iowa State UniversityP Wilcox - University of IowaA Wilhelm - University of PotsdamD. A Williams - University of California, Santa CruzB Zitzer - McGill University
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.861(2), p.134
- DOI
- 10.3847/1538-4357/aac4a2
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Publisher
- Institute of Physics (IOP)
- Number of pages
- 33
- Language
- English
- Date published
- 07/12/2018
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199711902771
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