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, Abraham David Falcone, S. Federici, Q. Feng, J. P. FinleyP. 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, And B. Zitzer, M. Böttcher, M. Fumagalli, And J. Jadhav

Research output: Contribution to journalArticle

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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 8.9σ 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.

Original languageEnglish (US)
Article number92
JournalAstrophysical Journal
Volume779
Issue number2
DOIs
StatePublished - Dec 20 2013

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spectral energy distribution
energy
blazars
power law
gamma rays
wavelength
timescale
photons
wavelengths
x rays
distribution
index
parameter

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Aliu, E., Archambault, S., Arlen, T., Aune, T., Beilicke, M., Benbow, W., ... Jadhav, A. J. (2013). Long term observations of b2 1215+30 with veritas. Astrophysical Journal, 779(2), [92]. https://doi.org/10.1088/0004-637X/779/2/92
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, Abraham David ; 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. ; De Bhróithe, A. O.Faoláin ; 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. ; Weekes, T. C. ; Weinstein, A. ; Welsing, R. ; Williams, D. A. ; Zitzer, And B. ; Böttcher, M. ; Fumagalli, M. ; Jadhav, And J. / Long term observations of b2 1215+30 with veritas. In: Astrophysical Journal. 2013 ; Vol. 779, No. 2.
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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 8.9σ 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.",
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 J. Dumm and M. Errando and Falcone, {Abraham David} and S. Federici and Q. Feng and Finley, {J. P.} and P. Fortin and L. Fortson 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 D. Kieda and H. Krawczynski and F. Krennrich and Lang, {M. J.} and Madhavan, {A. S.} and G. Maier and P. Majumdar and S. McArthur and A. McCann and P. 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. Tešić 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.}",
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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, J, Errando, M, Falcone, AD, Federici, S, Feng, Q, Finley, JP, Fortin, P, Fortson, L, 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, D, Krawczynski, H, Krennrich, F, Lang, MJ, Madhavan, AS, Maier, G, Majumdar, P, McArthur, S, McCann, A, 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/10.1088/0004-637X/779/2/92

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, Abraham David; 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.; De Bhróithe, A. O.Faoláin; 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.; Weekes, T. C.; Weinstein, A.; Welsing, R.; Williams, D. A.; Zitzer, And B.; Böttcher, M.; Fumagalli, M.; Jadhav, And J.

In: Astrophysical Journal, Vol. 779, No. 2, 92, 20.12.2013.

Research output: Contribution to journalArticle

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.

AU - Errando, M.

AU - Falcone, Abraham David

AU - Federici, S.

AU - Feng, Q.

AU - Finley, J. P.

AU - Fortin, P.

AU - Fortson, L.

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.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - Madhavan, A. S.

AU - Maier, G.

AU - Majumdar, P.

AU - McArthur, S.

AU - McCann, A.

AU - Moriarty, P.

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 - 2013/12/20

Y1 - 2013/12/20

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 8.9σ 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.

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 8.9σ 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.

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Aliu E, Archambault S, Arlen T, Aune T, Beilicke M, Benbow W et al. Long term observations of b2 1215+30 with veritas. Astrophysical Journal. 2013 Dec 20;779(2). 92. https://doi.org/10.1088/0004-637X/779/2/92