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Long Term Observations of B2 1215+30 with VERITAS

Aliu, E.; Archambault, S.; Arlen, T.; Aune, T.; Beilicke, M.; Benbow, W.; Bird, R.; Bouvier, A.; Buckley, J.H.; Bugaev, V.; Cesarini, A.; Ciupik, L.; Connolly, M.P.; Cui, W.; Dumm, J.; Errando, M.; Falcone, A.; Federici, S.; Feng, Q.; Finley, J.P.; Fortin, P.; Fortson, L.; Furniss, A.; Galante, N.; Gérard, L.; Gillanders, G.H.; Griffin, S.; Grube, J.; Gyuk, G.; Hanna, D.; Holder, J.; Hughes, G.; Humensky, T.B.; Kaaret, P.; Kertzman, M.; Khassen, Y.; Kieda, D.; Krawczynski, H.; Krennrich, F.; Lang, M.J.; Madhavan, A.S.; Maier, G.; Majumdar, P.; McArthur, S.; McCann, A.; Moriarty, P.; Mukherjee, R.; Nieto, D.; O'Faoláin de Bhróithe, A.; Ong, R.A.; Orr, M.; Otte, A.N.; Park, N.; Perkins, J.S.; Pohl, M.; Popkow, A.; Prokoph, H.; Quinn, J.; Ragan, K.; Reyes, L.C.; Reynolds, P.T.; Richards, G.T.; Roache, E.; Saxon, D.B.; Sembroski, G.H.; Skole, C.; Smith, A.W.; Soares-Furtado, M.; Staszak, D.; Telezhinsky, I.; Tešić, G.; Theiling, M.; Varlotta, A.; Vassiliev, V.V.; Vincent, S.; Wakely, S.P.;...

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Authors

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. Gérard

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'Faoláin de Bhróithe

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. Tešić

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

J. Jadhav

VERITAS Collaboration



Abstract

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 8.9σ 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 ± 0.4stat ± 0.3syst with an integral flux above 200 GeV of (8.0 ± 0.9stat ± 3.2syst) × 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.

Citation

Aliu, E., Archambault, S., Arlen, T., Aune, T., Beilicke, M., Benbow, W., …Collaboration, V. (2013). Long Term Observations of B2 1215+30 with VERITAS. Astrophysical Journal, 779(2), Article 92. https://doi.org/10.1088/0004-637x/779/2/92

Journal Article Type Article
Publication Date Dec 20, 2013
Deposit Date Apr 6, 2014
Publicly Available Date Mar 29, 2024
Journal Astrophysical Journal
Print ISSN 0004-637X
Electronic ISSN 1538-4357
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 779
Issue 2
Article Number 92
DOI https://doi.org/10.1088/0004-637x/779/2/92
Keywords BL Lacertae objects: general, BL Lacertae objects: individual (B2 1215+30, VER J1217+301).

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Copyright Statement
© 2013. The American Astronomical Society. All rights reserved.





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