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. P. Dumm; M. Errando; A. D. Falcone; S. Federici; Q. Feng; J. P. Finley; P. Fortin; L. F. 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. B. Kieda; H. Krawczynski; F. Krennrich; Mark Lang; A. S. Madhavan; G. Maier; P. Majumdar; S. McArthur; A. J. McCann; Patrick 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; And B. Zitzer; M. Böttcher; M. Fumagalli; And J. Jadhav

doi:10.13025/27356

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. P. Dumm
, M. Errando
, A. D. Falcone
, S. Federici
, Q. Feng
, J. P. Finley

P. Fortin, L. F. 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. B. Kieda, H. Krawczynski, F. Krennrich, Mark Lang, A. S. Madhavan, G. Maier, P. Majumdar, S. McArthur, A. J. McCann, Patrick 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, And B. Zitzer, M. Böttcher, M. Fumagalli, And J. Jadhav

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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 8.9s 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.

Original language	English (Ireland)
Article number	92
Journal	Astrophysical Journal
Volume	779
Issue number	2
DOIs	https://doi.org/10.13025/27356 https://doi.org/10.1088/0004-637x/779/2/92
Publication status	Published - 1 Dec 2013

Keywords

BL Lacertae objects: general

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10.13025/27356Licence: CC BY-NC-ND
10.1088/0004-637x/779/2/92

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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. P., Errando, M., Falcone, A. D., Federici, S., Feng, Q., ... Jadhav, A. J. (2013). LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS. Astrophysical Journal, 779(2), Article 92. https://doi.org/10.13025/27356, https://doi.org/10.1088/0004-637x/779/2/92

@article{98dd78b2b7544e9ea6aeb37ec8adcc20,

title = "LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS",

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 8.9s 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.",

keywords = "BL Lacertae objects: general",

author = "E. Aliu and S. Archambault and T. Arlen and T. Aune and M. Beilicke and W. Benbow and R. Bird and A. Bouvier and Buckley, \{J. H.\} and V. Bugaev and A. Cesarini and L. Ciupik and Connolly, \{M. P.\} and W. Cui and Dumm, \{J. P.\} and M. Errando and Falcone, \{A. D.\} and S. Federici and Q. Feng and Finley, \{J. P.\} and P. Fortin and Fortson, \{L. F.\} and A. Furniss and N. Galante and L. G{\'e}rard 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 Kieda, \{D. B.\} and H. Krawczynski and F. Krennrich and Mark Lang and Madhavan, \{A. S.\} and G. Maier and P. Majumdar and S. McArthur and McCann, \{A. J.\} and Patrick Moriarty and R. Mukherjee and D. Nieto and \{De Bhr{\'o}ithe\}, \{A. O'Faol{\'a}in\} and Ong, \{R. A.\} and M. Orr 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 C. Skole and Smith, \{A. W.\} and M. Soares-Furtado and D. Staszak and I. Telezhinsky and G. Te{\v s}i{\'c} 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 Zitzer, \{And B.\} and M. B{\"o}ttcher and M. Fumagalli and Jadhav, \{And J.\}",

year = "2013",

month = dec,

day = "1",

doi = "10.13025/27356",

language = "English (Ireland)",

volume = "779",

journal = "Astrophysical Journal",

number = "2",

}

Aliu, E, Archambault, S, Arlen, T, Aune, T, Beilicke, M, Benbow, W, Bird, R, Bouvier, A, Buckley, JH, Bugaev, V, Cesarini, A, Ciupik, L, Connolly, MP, Cui, W, Dumm, JP, Errando, M, Falcone, AD, Federici, S, Feng, Q, Finley, JP, Fortin, P, Fortson, LF, Furniss, A, Galante, N, Gérard, L, Gillanders, GH, Griffin, S, Grube, J, Gyuk, G, Hanna, D, Holder, J, Hughes, G, Humensky, TB, Kaaret, P, Kertzman, M, Khassen, Y, Kieda, DB, Krawczynski, H, Krennrich, F, Lang, M, Madhavan, AS, Maier, G, Majumdar, P, McArthur, S, McCann, AJ, Moriarty, P, Mukherjee, R, Nieto, D, De Bhróithe, AOF, Ong, RA, Orr, M, 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, Skole, C, Smith, AW, Soares-Furtado, M, Staszak, D, Telezhinsky, I, Tešić, G, Theiling, M, Varlotta, A, Vassiliev, VV, Vincent, S, Wakely, SP, Weekes, TC, Weinstein, A, Welsing, R, Williams, DA, Zitzer, AB, Böttcher, M, Fumagalli, M & Jadhav, AJ 2013, 'LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS', Astrophysical Journal, vol. 779, no. 2, 92. https://doi.org/10.13025/27356, https://doi.org/10.1088/0004-637x/779/2/92

TY - JOUR

T1 - LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS

AU - Aliu, E.

AU - Archambault, S.

AU - Arlen, T.

AU - Aune, T.

AU - Beilicke, M.

AU - Benbow, W.

AU - Bird, R.

AU - Bouvier, A.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Cesarini, A.

AU - Ciupik, L.

AU - Connolly, M. P.

AU - Cui, W.

AU - Dumm, J. P.

AU - Errando, M.

AU - Falcone, A. D.

AU - Federici, S.

AU - Feng, Q.

AU - Finley, J. P.

AU - Fortin, P.

AU - Fortson, L. F.

AU - Furniss, A.

AU - Galante, N.

AU - Gérard, L.

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. B.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, Mark

AU - Madhavan, A. S.

AU - Maier, G.

AU - Majumdar, P.

AU - McArthur, S.

AU - McCann, A. J.

AU - Moriarty, Patrick

AU - Mukherjee, R.

AU - Nieto, D.

AU - De Bhróithe, A. O'Faoláin

AU - Ong, R. A.

AU - Orr, M.

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 - Skole, C.

AU - Smith, A. W.

AU - Soares-Furtado, M.

AU - Staszak, D.

AU - Telezhinsky, I.

AU - Tešić, G.

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, And B.

AU - Böttcher, M.

AU - Fumagalli, M.

AU - Jadhav, And J.

PY - 2013/12/1

Y1 - 2013/12/1

N2 - 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.

AB - 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.

KW - BL Lacertae objects: general

UR - http://hdl.handle.net/10379/10200

UR - http://www.scopus.com/inward/record.url?scp=84890040124&partnerID=8YFLogxK

U2 - 10.13025/27356

DO - 10.13025/27356

M3 - Article

VL - 779

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 92

ER -

LONG TERM OBSERVATIONS OF B2 1215+30 WITH VERITAS

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