Journal article
Spatially resolving the very high energy emission from MGRO J2019+37 with VERITAS
The Astrophysical journal, Vol.788(1), 78
06/10/2014
DOI: 10.1088/0004-637X/788/1/78
Abstract
We present very high energy (VHE) imaging of MGRO J2019+37 obtained with the VERITAS observatory. The bright extended (∼2°) unidentified Milagro source is located toward the rich star formation region Cygnus-X. MGRO J2019+37 is resolved into two VERITAS sources. The faint, point-like source VER J2016+371 overlaps CTB 87, a filled-center remnant (SNR) with no evidence of a supernova remnant shell at the present time. Its spectrum is well fit in the 0.65-10 TeV energy range by a power-law model with photon index 2.3 ± 0.4. VER J2019+378 is a bright extended (∼1°) source that likely accounts for the bulk of the Milagro emission and is notably coincident with PSR J2021+3651 and the star formation region Sh 2–104. Its spectrum in the range 1-30 TeV is well fit with a power-law model of photon index 1.75 ± 0.3, among the hardest values measured in the VHE band, comparable to that observed near Vela-X. We explore the unusual spectrum and morphology in the radio and X-ray bands to constrain possible emission mechanisms for this source.
Details
- Title: Subtitle
- Spatially resolving the very high energy emission from MGRO J2019+37 with VERITAS
- Creators
- E Aliu - Columbia UniversityM Errando - Columbia UniversityT Aune - University of California, Los AngelesB Behera - Deutsches Elektronen-Synchrotron DESYX Chen - University of PotsdamS Federici - University of PotsdamM Beilicke - Washington University in St. LouisJ. H Buckley - Washington University in St. LouisV Bugaev - Washington University in St. LouisW Benbow - Harvard UniversityM Cerruti - Harvard UniversityK Berger - University of DelawareR Bird - University College DublinA Bouvier - University of California, Santa CruzL Ciupik - Adler PlanetariumM. P Connolly - Ollscoil na Gaillimhe – University of GalwayW Cui - Purdue UniversityJ Dumm - University of MinnesotaV. V Dwarkadas - University of ChicagoA Falcone - Pennsylvania State UniversityVERITAS Collaboration
- Contributors
- P Kaaret (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- The Astrophysical journal, Vol.788(1), 78
- DOI
- 10.1088/0004-637X/788/1/78
- ISSN
- 0004-637X
- eISSN
- 1538-4357
- Language
- English
- Date published
- 06/10/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199789002771
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