Spatially resolving the very high energy emission from MGRO J2019+37 with VERITAS

E Aliu; M Errando; T Aune; B Behera; X Chen; S Federici; M Beilicke; J. H Buckley; V Bugaev; W Benbow; M Cerruti; K Berger; R Bird; A Bouvier; L Ciupik; M. P Connolly; W Cui; J Dumm; VERITAS Collaboration; V. V Dwarkadas; A Falcone

doi:10.1088/0004-637X/788/1/78

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Spatially resolving the very high energy emission from MGRO J2019+37 with VERITAS

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Spatially resolving the very high energy emission from MGRO J2019+37 with VERITAS

E Aliu, M Errando, T Aune, B Behera, X Chen, S Federici, M Beilicke, J. H Buckley, V Bugaev, W Benbow, …

The Astrophysical journal, Vol.788(1), 78

06/10/2014

DOI: 10.1088/0004-637X/788/1/78

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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.

ASTROPHYSICS, COSMOLOGY AND ASTRONOMY

COMPARATIVE EVALUATIONS

EMISSION

GAMMA RADIATION

PHOTONS

PULSARS

SPECTRA

SUPERNOVA REMNANTS

SUPERNOVAE

TEV RANGE

X RADIATION

Details

Title: Subtitle: Spatially resolving the very high energy emission from MGRO J2019+37 with VERITAS
Creators: E Aliu - Columbia University
M Errando - Columbia University
T Aune - University of California, Los Angeles
B Behera - Deutsches Elektronen-Synchrotron DESY
X Chen - University of Potsdam
S Federici - University of Potsdam
M Beilicke - Washington University in St. Louis
J. H Buckley - Washington University in St. Louis
V Bugaev - Washington University in St. Louis
W Benbow - Harvard University
M Cerruti - Harvard University
K Berger - University of Delaware
R Bird - University College Dublin
A Bouvier - University of California, Santa Cruz
L Ciupik - Adler Planetarium
M. P Connolly - Ollscoil na Gaillimhe – University of Galway
W Cui - Purdue University West Lafayette
J Dumm - University of Minnesota
VERITAS Collaboration
V. V Dwarkadas - University of Chicago
A Falcone - Pennsylvania State University
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
Publisher: Institute of Physics (IOP)
Language: English
Date published: 06/10/2014
Academic Unit: Physics and Astronomy
Record Identifier: 9984199789002771

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