Discovery of a new TeV gamma-ray source: Ver J0521+211

S. Archambault; T. Arlen; T. Aune; B. Behera; M. Beilicke; W. Benbow; R. Bird; A. Bouvier; J. H. Buckley; V. Bugaev; K. Byrum; A. Cesarini; L. Ciupik; M. P. Connolly; W. Cui; M. Errando; A. Falcone; S. Federici; Q. Feng; J. P. Finley; L. Fortson; A. Furniss; N. Galante; D. Gall; G. H. Gillanders; S. Griffin; J. Grube; G. Gyuk; D. Hanna; J. Holder; G. Hughes; T. B. Humensky; P. Kaaret; M. Kertzman; Y. Khassen; D. Kieda; H. Krawczynski; F. Krennrich; S. Kumar; M. J. Lang; A. S. Madhavan; G. Maier; P. Majumdar; S. McArthur; A. McCann; J. Millis; P. Moriarty; R. Mukherjee; A. O'Faoláin De Bhróithe; R. A. Ong; A. N. Otte; N. Park; J. S. Perkins; M. Pohl; A. Popkow; H. Prokoph; J. Quinn; K. Ragan; L. C. Reyes; P. T. Reynolds; G. T. Richards; E. Roache; D. B. Saxon; G. H. Sembroski; A. W. Smith; D. Staszak; I. Telezhinsky; M. Theiling; A. Varlotta; V. V. Vassiliev; S. Vincent; S. P. Wakely; T. C. Weekes; A. Weinstein; R. Welsing; D. A. Williams; B. Zitzer; M. Böttcher; S. J. Fegan; P. Fortin; J. P. Halpern; Y. Y. Kovalev; M. L. Lister; J. Liu; A. B. Pushkarev; P. S. Smith

doi:10.1088/0004-637X/776/2/69

Discovery of a new TeV gamma-ray source: Ver J0521+211

S. Archambault
, T. Arlen
, T. Aune
, B. Behera
, M. Beilicke
, W. Benbow
, R. Bird
, A. Bouvier
, J. H. Buckley
, V. Bugaev
, K. Byrum
, A. Cesarini
, L. Ciupik
, M. P. Connolly
, W. Cui
, M. Errando
, A. Falcone
, S. Federici
, Q. Feng
, J. P. Finley

L. Fortson, A. Furniss, N. Galante, D. Gall, G. H. Gillanders, S. Griffin, J. Grube, G. Gyuk, D. Hanna, J. Holder, G. Hughes, T. B. Humensky, P. Kaaret, M. Kertzman, Y. Khassen, D. Kieda, H. Krawczynski, F. Krennrich, S. Kumar, M. J. Lang, A. S. Madhavan, G. Maier, P. Majumdar, S. McArthur, A. McCann, J. Millis, P. Moriarty, R. Mukherjee, A. O'Faoláin De Bhróithe, R. A. Ong, A. N. Otte, N. Park, J. S. Perkins, M. Pohl, A. Popkow, H. Prokoph, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, G. T. Richards, E. Roache, D. B. Saxon, G. H. Sembroski, A. W. Smith, D. Staszak, I. Telezhinsky, M. Theiling, A. Varlotta, V. V. Vassiliev, S. Vincent, S. P. Wakely, T. C. Weekes, A. Weinstein, R. Welsing, D. A. Williams, B. Zitzer, M. Böttcher, S. J. Fegan, P. Fortin, J. P. Halpern, Y. Y. Kovalev, M. L. Lister, J. Liu, A. B. Pushkarev, P. S. Smith

Department of Physics
McGill University
Department of Physics and Astronomy
University of California, Los Angeles
c/o DESY
Physics Department
Washington University in St. Louis
Center for Astrophysics | Harvard & Smithsonian
School of Physics
University College Dublin
Physics Dept.
University of California at Santa Cruz
Argonne National Laboratory
School of Physics
IDA Business Park
Astronomy Department
Adler Planetarium
Department of Physics
Purdue University
Department of Physics and Astronomy
Barnard College
Department of Astronomy and Astrophysics
Pennsylvania State University
Institute of Physics and Astronomy
University of Potsdam
University of Minnesota
Department of Physics and Astronomy
University of Iowa
Bartol Research Institute
The Bartol Research Institute
Columbia University
Department of Physics and Astronomy
DePauw University
Department of Physics & Astronomy
University of Utah
Department of Physics and Astronomy
Iowa State University
Saha Institute of Nuclear Physics
University of Chicago
University of Chicago
Department of Physics
Anderson University
Department of Life and Physical Sciences
Galway-Mayo Institute of Technology
School of Physics
College of Computing
NASA Goddard Space Flight Center
Physics Department
California Polytechnic State University, San Luis Obispo
Department of Applied Physics and Instrumentation
Cork Institute of Technology
Centre for Space Research
North-West University
Columbia Astrophysics Laboratory
Max-Planck-Institut für Radioastronomie
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Russian Academy of Sciences
Crimean Astrophysical Observatory RAS
Steward Observatory
University of Arizona

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov Telescope Array. These observations were motivated by the discovery of a cluster of >30 GeV photons in the first year of Fermi Large Area Telescope observations. VER J0521+211 is relatively bright at TeV energies, with a mean photon flux of (1.93 ± 0.13_stat ± 0.78_sys) × 10 ^-11 cm^-2 s^-1 above 0.2 TeV during the period of the VERITAS observations. The source is strongly variable on a daily timescale across all wavebands, from optical to TeV, with a peak flux corresponding to ∼0.3 times the steady Crab Nebula flux at TeV energies. Follow-up observations in the optical and X-ray bands classify the newly discovered TeV source as a BL Lac-type blazar with uncertain redshift, although recent measurements suggest z = 0.108. VER J0521+211 exhibits all the defining properties of blazars in radio, optical, X-ray, and gamma-ray wavelengths.

Original language	English
Article number	69
Journal	Astrophysical Journal
Volume	776
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/776/2/69
Publication status	Published - 20 Oct 2013

Keywords

gamma rays: galaxies

Access to Document

10.1088/0004-637X/776/2/69

Cite this

Archambault, S., Arlen, T., Aune, T., Behera, B., Beilicke, M., Benbow, W., Bird, R., Bouvier, A., Buckley, J. H., Bugaev, V., Byrum, K., Cesarini, A., Ciupik, L., Connolly, M. P., Cui, W., Errando, M., Falcone, A., Federici, S., Feng, Q., ... Smith, P. S. (2013). Discovery of a new TeV gamma-ray source: Ver J0521+211. Astrophysical Journal, 776(2), Article 69. https://doi.org/10.1088/0004-637X/776/2/69

@article{3e3805e089904af79db75ac9e7adbbde,

title = "Discovery of a new TeV gamma-ray source: Ver J0521+211",

abstract = "We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov Telescope Array. These observations were motivated by the discovery of a cluster of >30 GeV photons in the first year of Fermi Large Area Telescope observations. VER J0521+211 is relatively bright at TeV energies, with a mean photon flux of (1.93 ± 0.13stat ± 0.78sys) {\texttimes} 10 -11 cm-2 s-1 above 0.2 TeV during the period of the VERITAS observations. The source is strongly variable on a daily timescale across all wavebands, from optical to TeV, with a peak flux corresponding to ∼0.3 times the steady Crab Nebula flux at TeV energies. Follow-up observations in the optical and X-ray bands classify the newly discovered TeV source as a BL Lac-type blazar with uncertain redshift, although recent measurements suggest z = 0.108. VER J0521+211 exhibits all the defining properties of blazars in radio, optical, X-ray, and gamma-ray wavelengths.",

keywords = "gamma rays: galaxies",

author = "S. Archambault and T. Arlen and T. Aune and B. Behera and M. Beilicke and W. Benbow and R. Bird and A. Bouvier and Buckley, \{J. H.\} and V. Bugaev and K. Byrum and A. Cesarini and L. Ciupik and Connolly, \{M. P.\} and W. Cui and M. Errando and A. Falcone and S. Federici and Q. Feng and Finley, \{J. P.\} and L. Fortson and A. Furniss and N. Galante and D. Gall and Gillanders, \{G. H.\} and S. Griffin and J. Grube and G. Gyuk and D. Hanna and J. Holder and G. Hughes and Humensky, \{T. B.\} and P. Kaaret and M. Kertzman and Y. Khassen and D. Kieda and H. Krawczynski and F. Krennrich and S. Kumar and Lang, \{M. J.\} and Madhavan, \{A. S.\} and G. Maier and P. Majumdar and S. McArthur and A. McCann and J. Millis and P. Moriarty and R. Mukherjee and \{O'Faol{\'a}in De Bhr{\'o}ithe\}, A. and Ong, \{R. A.\} and Otte, \{A. N.\} and N. Park and Perkins, \{J. S.\} and M. Pohl and A. Popkow and H. Prokoph and J. Quinn and K. Ragan and Reyes, \{L. C.\} and Reynolds, \{P. T.\} and Richards, \{G. T.\} and E. Roache and Saxon, \{D. B.\} and Sembroski, \{G. H.\} and Smith, \{A. W.\} and D. Staszak and I. Telezhinsky and M. Theiling and A. Varlotta and Vassiliev, \{V. V.\} and S. Vincent and Wakely, \{S. P.\} and Weekes, \{T. C.\} and A. Weinstein and R. Welsing and Williams, \{D. A.\} and B. Zitzer and M. B{\"o}ttcher and Fegan, \{S. J.\} and P. Fortin and Halpern, \{J. P.\} and Kovalev, \{Y. Y.\} and Lister, \{M. L.\} and J. Liu and Pushkarev, \{A. B.\} and Smith, \{P. S.\}",

year = "2013",

month = oct,

day = "20",

doi = "10.1088/0004-637X/776/2/69",

language = "English",

volume = "776",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

Archambault, S, Arlen, T, Aune, T, Behera, B, Beilicke, M, Benbow, W, Bird, R, Bouvier, A, Buckley, JH, Bugaev, V, Byrum, K, Cesarini, A, Ciupik, L, Connolly, MP, Cui, W, Errando, M, Falcone, A, Federici, S, Feng, Q, Finley, JP, Fortson, L, Furniss, A, Galante, N, Gall, D, Gillanders, GH, Griffin, S, Grube, J, Gyuk, G, Hanna, D, Holder, J, Hughes, G, Humensky, TB, Kaaret, P, Kertzman, M, Khassen, Y, Kieda, D, Krawczynski, H, Krennrich, F, Kumar, S, Lang, MJ, Madhavan, AS, Maier, G, Majumdar, P, McArthur, S, McCann, A, Millis, J, Moriarty, P, Mukherjee, R, O'Faoláin De Bhróithe, A, Ong, RA, Otte, AN, Park, N, Perkins, JS, Pohl, M, Popkow, A, Prokoph, H, Quinn, J, Ragan, K, Reyes, LC, Reynolds, PT, Richards, GT, Roache, E, Saxon, DB, Sembroski, GH, Smith, AW, Staszak, D, Telezhinsky, I, Theiling, M, Varlotta, A, Vassiliev, VV, Vincent, S, Wakely, SP, Weekes, TC, Weinstein, A, Welsing, R, Williams, DA, Zitzer, B, Böttcher, M, Fegan, SJ, Fortin, P, Halpern, JP, Kovalev, YY, Lister, ML, Liu, J, Pushkarev, AB & Smith, PS 2013, 'Discovery of a new TeV gamma-ray source: Ver J0521+211', Astrophysical Journal, vol. 776, no. 2, 69. https://doi.org/10.1088/0004-637X/776/2/69

TY - JOUR

T1 - Discovery of a new TeV gamma-ray source

T2 - Ver J0521+211

AU - Archambault, S.

AU - Arlen, T.

AU - Aune, T.

AU - Behera, B.

AU - Beilicke, M.

AU - Benbow, W.

AU - Bird, R.

AU - Bouvier, A.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Byrum, K.

AU - Cesarini, A.

AU - Ciupik, L.

AU - Connolly, M. P.

AU - Cui, W.

AU - Errando, M.

AU - Falcone, A.

AU - Federici, S.

AU - Feng, Q.

AU - Finley, J. P.

AU - Fortson, L.

AU - Furniss, A.

AU - Galante, N.

AU - Gall, D.

AU - Gillanders, G. H.

AU - Griffin, S.

AU - Grube, J.

AU - Gyuk, G.

AU - Hanna, D.

AU - Holder, J.

AU - Hughes, G.

AU - Humensky, T. B.

AU - Kaaret, P.

AU - Kertzman, M.

AU - Khassen, Y.

AU - Kieda, D.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Kumar, S.

AU - Lang, M. J.

AU - Madhavan, A. S.

AU - Maier, G.

AU - Majumdar, P.

AU - McArthur, S.

AU - McCann, A.

AU - Millis, J.

AU - Moriarty, P.

AU - Mukherjee, R.

AU - O'Faoláin De Bhróithe, A.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Park, N.

AU - Perkins, J. S.

AU - Pohl, M.

AU - Popkow, A.

AU - Prokoph, H.

AU - Quinn, J.

AU - Ragan, K.

AU - Reyes, L. C.

AU - Reynolds, P. T.

AU - Richards, G. T.

AU - Roache, E.

AU - Saxon, D. B.

AU - Sembroski, G. H.

AU - Smith, A. W.

AU - Staszak, D.

AU - Telezhinsky, I.

AU - Theiling, M.

AU - Varlotta, A.

AU - Vassiliev, V. V.

AU - Vincent, S.

AU - Wakely, S. P.

AU - Weekes, T. C.

AU - Weinstein, A.

AU - Welsing, R.

AU - Williams, D. A.

AU - Zitzer, B.

AU - Böttcher, M.

AU - Fegan, S. J.

AU - Fortin, P.

AU - Halpern, J. P.

AU - Kovalev, Y. Y.

AU - Lister, M. L.

AU - Liu, J.

AU - Pushkarev, A. B.

AU - Smith, P. S.

PY - 2013/10/20

Y1 - 2013/10/20

N2 - We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov Telescope Array. These observations were motivated by the discovery of a cluster of >30 GeV photons in the first year of Fermi Large Area Telescope observations. VER J0521+211 is relatively bright at TeV energies, with a mean photon flux of (1.93 ± 0.13stat ± 0.78sys) × 10 -11 cm-2 s-1 above 0.2 TeV during the period of the VERITAS observations. The source is strongly variable on a daily timescale across all wavebands, from optical to TeV, with a peak flux corresponding to ∼0.3 times the steady Crab Nebula flux at TeV energies. Follow-up observations in the optical and X-ray bands classify the newly discovered TeV source as a BL Lac-type blazar with uncertain redshift, although recent measurements suggest z = 0.108. VER J0521+211 exhibits all the defining properties of blazars in radio, optical, X-ray, and gamma-ray wavelengths.

AB - We report the detection of a new TeV gamma-ray source, VER J0521+211, based on observations made with the VERITAS imaging atmospheric Cherenkov Telescope Array. These observations were motivated by the discovery of a cluster of >30 GeV photons in the first year of Fermi Large Area Telescope observations. VER J0521+211 is relatively bright at TeV energies, with a mean photon flux of (1.93 ± 0.13stat ± 0.78sys) × 10 -11 cm-2 s-1 above 0.2 TeV during the period of the VERITAS observations. The source is strongly variable on a daily timescale across all wavebands, from optical to TeV, with a peak flux corresponding to ∼0.3 times the steady Crab Nebula flux at TeV energies. Follow-up observations in the optical and X-ray bands classify the newly discovered TeV source as a BL Lac-type blazar with uncertain redshift, although recent measurements suggest z = 0.108. VER J0521+211 exhibits all the defining properties of blazars in radio, optical, X-ray, and gamma-ray wavelengths.

KW - gamma rays: galaxies

U2 - 10.1088/0004-637X/776/2/69

DO - 10.1088/0004-637X/776/2/69

M3 - Article

AN - SCOPUS:84886083660

SN - 0004-637X

VL - 776

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 69

ER -

Discovery of a new TeV gamma-ray source: Ver J0521+211

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