LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS

E. Aliu; S. Archambault; T. Arlen; T. Aune; M. Beilicke; W. Benbow; R. Bird; A. Bouvier; J. H. Buckley; V. Bugaev; A. Cesarini; L. Ciupik; M. P. Connolly; W. Cui; J. Dumm; M. Errando; A. Falcone; S. Federici; Q. Feng; J. P. Finley; P. Fortin; L. Fortson; A. Furniss; N. Galante; L. Gerard; 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; M. J. Lang; A. S. Madhavan; G. Maier; P. Majumdar; S. McArthur; A. McCann; P. Moriarty; R. Mukherjee; D. Nieto; A. O'Faolain De Bhroithe; R. A. Ong; M. Orr; 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; C. Skole; A. W. Smith; M. Soares-Furtado; D. Staszak; I. Telezhinsky; G. Tesic; 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. Bottcher; M. Fumagalli; J. Jadhav; VERITAS Collaboration

doi:10.1088/0004-637X/779/2/92

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LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS

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LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS

E. Aliu, S. Archambault, T. Arlen, T. Aune, M. Beilicke, W. Benbow, R. Bird, A. Bouvier, J. H. Buckley, V. Bugaev, …

The Astrophysical journal, v 779(2)

20 Dec 2013

DOI: https://doi.org/10.1088/0004-637X/779/2/92

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Abstract

Astronomy & Astrophysics

Physical Sciences

Science & Technology

We report on VERITAS observations of the BL Lac object B2 1215+30 between 2008 and 2012. During this period, the source was detected at very high energies (VHEs; E > 100 GeV) by VERITAS with a significance of 8.9s and showed clear variability on timescales larger than months. In 2011, the source was found to be in a relatively bright state and a power-law fit to the differential photon spectrum yields a spectral index of 3.6 +/- 0.4(stat) +/- 0.3(syst) with an integral flux above 200 GeV of (8.0 +/- 0.9(stat) +/- 3.2(syst)) x 10(-12) cm(-2) s(-1). No short term variability could be detected during the bright state in 2011. Multi-wavelength data were obtained contemporaneously with the VERITAS observations in 2011 and cover optical (Super-LOTIS, MDM, Swift/UVOT), X-ray (Swift/XRT), and gamma-ray (Fermi-LAT) frequencies. These were used to construct the spectral energy distribution (SED) of B2 1215+30. A one-zone leptonic model is used to model the blazar emission and the results are compared to those of MAGIC from early 2011 and other VERITAS-detected blazars. The SED can be reproduced well with model parameters typical for VHE-detected BL Lac objects.

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Title: LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS
Creators: E. Aliu - Columbia University
S. Archambault - McGill University
T. Arlen - University of California, Los Angeles
T. Aune - University of California, Los Angeles
M. Beilicke - Washington University in St. Louis
W. Benbow - Harvard University
R. Bird - University College Dublin
A. Bouvier - University of California, Santa Cruz
J. H. Buckley - Washington University in St. Louis
V. Bugaev - Washington University in St. Louis
A. Cesarini - National University of Ireland, Galway
L. Ciupik - Adler Planetarium
M. P. Connolly - National University of Ireland, Galway
W. Cui - Purdue University West Lafayette
J. Dumm - University of Minnesota
M. Errando - Columbia University
A. Falcone - Pennsylvania State University
S. Federici - University of Potsdam
Q. Feng - Purdue University West Lafayette
J. P. Finley - Purdue University West Lafayette
P. Fortin - École Polytechnique
L. Fortson - Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA
A. Furniss - University of California, Santa Cruz
N. Galante - Harvard University
L. Gerard - DESY, D-15738 Zeuthen, Germany
G. H. Gillanders - National University of Ireland, Galway
S. Griffin - McGill University
J. Grube - Adler Planetarium
G. Gyuk - Adler Planetarium
D. Hanna - McGill University
J. Holder - University of Delaware
G. Hughes - DESY, D-15738 Zeuthen, Germany
T. B. Humensky - Columbia University
P. Kaaret - University of Iowa
M. Kertzman - DePauw University
Y. Khassen - University College Dublin
D. Kieda - University of Utah
H. Krawczynski - Washington University in St. Louis
F. Krennrich - Iowa State University
M. J. Lang - National University of Ireland, Galway
A. S. Madhavan - Iowa State University
G. Maier - DESY, D-15738 Zeuthen, Germany
P. Majumdar - Saha Institute of Nuclear Physics
S. McArthur - University of Chicago
A. McCann - University of Chicago
P. Moriarty - Galway-Mayo Institute of Technology
R. Mukherjee - Columbia University
D. Nieto - Columbia University
A. O'Faolain De Bhroithe - Univ Coll Dublin, Sch Phys, Dublin 4, Ireland
R. A. Ong - University of California, Los Angeles
M. Orr - Iowa State University
A. N. Otte - Georgia Institute of Technology
N. Park - University of Chicago
J. S. Perkins - University of Maryland, Baltimore County
M. Pohl - University of Potsdam
A. Popkow - University of California, Los Angeles
H. Prokoph - DESY, D-15738 Zeuthen, Germany
J. Quinn - University College Dublin
K. Ragan - McGill University
L. C. Reyes - California Polytechnic State University
P. T. Reynolds - Cork Institute of Technology
G. T. Richards - Georgia Institute of Technology
E. Roache - Harvard University
D. B. Saxon - University of Delaware
G. H. Sembroski - Purdue University West Lafayette
C. Skole - DESY, D-15738 Zeuthen, Germany
A. W. Smith - University of Utah
M. Soares-Furtado - University of California, Santa Cruz
D. Staszak - McGill University
I. Telezhinsky - University of Potsdam
G. Tesic - McGill University
M. Theiling - Purdue University West Lafayette
A. Varlotta - Purdue University West Lafayette
V. V. Vassiliev - University of California, Los Angeles
S. Vincent - DESY, D-15738 Zeuthen, Germany
S. P. Wakely - University of Chicago
T. C. Weekes - Harvard University
A. Weinstein - Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
R. Welsing - DESY, D-15738 Zeuthen, Germany
D. A. Williams - University of California, Santa Cruz
B. Zitzer - Argonne Natl Lab, Argonne, IL 60439 USA
M. Bottcher - Ohio University - Lancaster
M. Fumagalli - Princeton University
J. Jadhav - North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa
VERITAS Collaboration
Publication Details: The Astrophysical journal, v 779(2)
Publisher: Iop Publishing Ltd
Number of pages: 9
Grant note: Space Telescope Science Institute NSERC in Canada; Natural Sciences and Engineering Research Council of Canada (NSERC) SFI 10/RFP/AST2748 / Science Foundation Ireland; European Commission NAS 5-26555 / NASA; National Aeronautics & Space Administration (NASA) 0969529 / Division Of Physics; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) South African Research Chairs Initiative of the Department of Science and Technology National Research Foundation of South Africa; National Research Foundation - South Africa NNX12AJ12G / NASA Swift Guest Investigator program HF-51305.01-A / NASA through Hubble Fellowship grant STFC in the U.K.; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) U.S. Department of Energy Office of Science; United States Department of Energy (DOE) Helmholtz Association Smithsonian Institution U.S. National Science Foundation; National Science Foundation (NSF)
Resource Type: Journal article
Language: English
Academic Unit: Physics
Web of Science ID: WOS:000328187200002
Scopus ID: 2-s2.0-84890040124
Other Identifier: 991019201363204721

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Collaboration types: Domestic collaboration; International collaboration
Web of Science research areas: Astronomy & Astrophysics

LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS

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