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Journal article
A Very High Energy γ-Ray Survey toward the Cygnus Region of the Galaxy
The Astrophysical journal, v 861(2), 134
10 Jul 2018
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.
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Details
- Title
- 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 - Climate CentralW. Benbow - Center for Astrophysics Harvard & SmithsonianR. Bird - University of California, Los AngelesR. Brose - University of PotsdamM. Buchovecky - University of California, Los AngelesV. Bugaev - Washington University in St. LouisW. Cui - Tsinghua UniversityM. K. Daniel - Center for Astrophysics Harvard & SmithsonianA. 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 - Center for Astrophysics Harvard & SmithsonianT. 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 - Fermi National Accelerator LaboratoryA. 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 - Munster Technological UniversityG. T. Richards - Georgia Institute of TechnologyE. Roache - Center for Astrophysics Harvard & SmithsonianJ. 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 - Fermi National Accelerator LaboratoryJ. E. Ward - Institute for High Energy PhysicsA. 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
- Publication Details
- The Astrophysical journal, v 861(2), 134
- Publisher
- The American Astronomical Society
- Number of pages
- 33
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000438684300014
- Scopus ID
- 2-s2.0-85050686333
- Other Identifier
- 991021869219404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics