A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30

A. U. Abeysekara; S. Archambault; A. Archer; W. Benbow; R. Bird; M. Buchovecky; J. H. Buckley; V. Bugaev; K. Byrum; M. Cerruti; X. Chen; L. Ciupik; W. Cui; H. J. Dickinson; J. D. Eisch; M. Errando; A. Falcone; Q. Feng; J. P. Finley; H. Fleischhack; L. Fortson; A. Furniss; G. H. Gillanders; S. Griffin; J. Grube; M. Hütten; N. Håkansson; D. Hanna; J. Holder; T. B. Humensky; C. A. Johnson; P. Kaaret; P. Kar; M. Kertzman; D. Kieda; M. Krause; F. Krennrich; S. Kumar; M. J. Lang; G. Maier; S. McArthur; A. McCann; K. Meagher; P. Moriarty; R. Mukherjee; T. Nguyen; D. Nieto; R. A. Ong; A. N. Otte; N. Park; V. Pelassa; M. Pohl; A. Popkow; E. Pueschel; J. Quinn; K. Ragan; P. T. Reynolds; G. T. Richards; E. Roache; C. Rulten; M. Santander; G. H. Sembroski; K. Shahinyan; D. Staszak; I. Telezhinsky; J. V. Tucci; J. Tyler; S. P. Wakely; O. M. Weiner; A. Weinstein; A. Wilhelm; D. A. Williams; S. Fegan; B. Giebels; D. Horan; A. Berdyugin; J. Kuan; E. Lindfors; K. Nilsson; A. Oksanen; H. Prokoph; R. Reinthal; L. Takalo; F. Zefi

doi:10.3847/1538-4357/836/2/205

A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30

A. U. Abeysekara, S. Archambault, A. Archer, W. Benbow, R. Bird, M. Buchovecky, J. H. Buckley, V. Bugaev, K. Byrum, M. Cerruti, X. Chen, L. Ciupik, W. Cui, H. J. Dickinson, J. D. Eisch, M. Errando, A. Falcone, Q. Feng, J. P. Finley, H. FleischhackL. Fortson, A. Furniss, G. H. Gillanders, S. Griffin, J. Grube, M. Hütten, N. Håkansson, D. Hanna, J. Holder, T. B. Humensky, C. A. Johnson, P. Kaaret, P. Kar, M. Kertzman, D. Kieda, M. Krause, F. Krennrich, S. Kumar, M. J. Lang, G. Maier, S. McArthur, A. McCann, K. Meagher, P. Moriarty, R. Mukherjee, T. Nguyen, D. Nieto, R. A. Ong, A. N. Otte, N. Park, V. Pelassa, M. Pohl, A. Popkow, E. Pueschel, J. Quinn, K. Ragan, P. T. Reynolds, G. T. Richards, E. Roache, C. Rulten, M. Santander, G. H. Sembroski, K. Shahinyan, D. Staszak, I. Telezhinsky, J. V. Tucci, J. Tyler, S. P. Wakely, O. M. Weiner, A. Weinstein, A. Wilhelm, D. A. Williams, S. Fegan, B. Giebels, D. Horan, A. Berdyugin, J. Kuan, E. Lindfors, K. Nilsson, A. Oksanen, H. Prokoph, R. Reinthal, L. Takalo, F. Zefi

Physics and Astronomy (Twin Cities)

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Abstract

B2 1215+30 is a BL-Lac-type blazar that was first detected at TeV energies by the MAGIC atmospheric Cherenkov telescopes and subsequently confirmed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) observatory with data collected between 2009 and 2012. In 2014 February 08, VERITAS detected a large-amplitude flare from B2 1215+30 during routine monitoring observations of the blazar 1ES 1218 +304, located in the same field of view. The TeV flux reached 2.4 times the Crab Nebula flux with a variability timescale of <3.6 hr. Multiwavelength observations with Fermi-LAT, Swift, and the Tuorla Observatory revealed a correlated high GeV flux state and no significant optical counterpart to the flare, with a spectral energy distribution where the gamma-ray luminosity exceeds the synchrotron luminosity. When interpreted in the framework of a onezone leptonic model, the observed emission implies a high degree of beaming, with Doppler factor δ > 10, and an electron population with spectral index p < 2.3.

Original language	English (US)
Article number	205
Journal	Astrophysical Journal
Volume	836
Issue number	2
DOIs	https://doi.org/10.3847/1538-4357/836/2/205
State	Published - Feb 20 2017

Bibliographical note

Publisher Copyright:
© 2017. The American Astronomical Society. All rights reserved.

Keywords

BL Lacertae objects: individual (B2 1215+30, VER J1217+301)
galaxies: active
galaxies: jets
galaxies: nuclei
gamma rays: galaxies

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Abeysekara, A. U., Archambault, S., Archer, A., Benbow, W., Bird, R., Buchovecky, M., Buckley, J. H., Bugaev, V., Byrum, K., Cerruti, M., Chen, X., Ciupik, L., Cui, W., Dickinson, H. J., Eisch, J. D., Errando, M., Falcone, A., Feng, Q., Finley, J. P., ... Zefi, F. (2017). A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30. Astrophysical Journal, 836(2), Article 205. https://doi.org/10.3847/1538-4357/836/2/205

Abeysekara, AU, Archambault, S, Archer, A, Benbow, W, Bird, R, Buchovecky, M, Buckley, JH, Bugaev, V, Byrum, K, Cerruti, M, Chen, X, Ciupik, L, Cui, W, Dickinson, HJ, Eisch, JD, Errando, M, Falcone, A, Feng, Q, Finley, JP, Fleischhack, H, Fortson, L, Furniss, A, Gillanders, GH, Griffin, S, Grube, J, Hütten, M, Håkansson, N, Hanna, D, Holder, J, Humensky, TB, Johnson, CA, Kaaret, P, Kar, P, Kertzman, M, Kieda, D, Krause, M, Krennrich, F, Kumar, S, Lang, MJ, Maier, G, McArthur, S, McCann, A, Meagher, K, Moriarty, P, Mukherjee, R, Nguyen, T, Nieto, D, Ong, RA, Otte, AN, Park, N, Pelassa, V, Pohl, M, Popkow, A, Pueschel, E, Quinn, J, Ragan, K, Reynolds, PT, Richards, GT, Roache, E, Rulten, C, Santander, M, Sembroski, GH, Shahinyan, K, Staszak, D, Telezhinsky, I, Tucci, JV, Tyler, J, Wakely, SP, Weiner, OM, Weinstein, A, Wilhelm, A, Williams, DA, Fegan, S, Giebels, B, Horan, D, Berdyugin, A, Kuan, J, Lindfors, E, Nilsson, K, Oksanen, A, Prokoph, H, Reinthal, R, Takalo, L & Zefi, F 2017, 'A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30', Astrophysical Journal, vol. 836, no. 2, 205. https://doi.org/10.3847/1538-4357/836/2/205

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title = "A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30",

abstract = "B2 1215+30 is a BL-Lac-type blazar that was first detected at TeV energies by the MAGIC atmospheric Cherenkov telescopes and subsequently confirmed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) observatory with data collected between 2009 and 2012. In 2014 February 08, VERITAS detected a large-amplitude flare from B2 1215+30 during routine monitoring observations of the blazar 1ES 1218 +304, located in the same field of view. The TeV flux reached 2.4 times the Crab Nebula flux with a variability timescale of <3.6 hr. Multiwavelength observations with Fermi-LAT, Swift, and the Tuorla Observatory revealed a correlated high GeV flux state and no significant optical counterpart to the flare, with a spectral energy distribution where the gamma-ray luminosity exceeds the synchrotron luminosity. When interpreted in the framework of a onezone leptonic model, the observed emission implies a high degree of beaming, with Doppler factor δ > 10, and an electron population with spectral index p < 2.3.",

keywords = "BL Lacertae objects: individual (B2 1215+30, VER J1217+301), galaxies: active, galaxies: jets, galaxies: nuclei, gamma rays: galaxies",

author = "Abeysekara, {A. U.} and S. Archambault and A. Archer and W. Benbow and R. Bird and M. Buchovecky and Buckley, {J. H.} and V. Bugaev and K. Byrum and M. Cerruti and X. Chen and L. Ciupik and W. Cui and Dickinson, {H. J.} and Eisch, {J. D.} and M. Errando and A. Falcone and Q. Feng and Finley, {J. P.} and H. Fleischhack and L. Fortson and A. Furniss and Gillanders, {G. H.} and S. Griffin and J. Grube and M. H{\"u}tten and N. H{\aa}kansson and D. Hanna and J. Holder and Humensky, {T. B.} and Johnson, {C. A.} and P. Kaaret and P. Kar and M. Kertzman and D. Kieda and M. Krause and F. Krennrich and S. Kumar and Lang, {M. J.} and G. Maier and S. McArthur and A. McCann and K. Meagher and P. Moriarty and R. Mukherjee and T. Nguyen and D. Nieto and Ong, {R. A.} and Otte, {A. N.} and N. Park and V. Pelassa and M. Pohl and A. Popkow and E. Pueschel and J. Quinn and K. Ragan and Reynolds, {P. T.} and Richards, {G. T.} and E. Roache and C. Rulten and M. Santander and Sembroski, {G. H.} and K. Shahinyan and D. Staszak and I. Telezhinsky and Tucci, {J. V.} and J. Tyler and Wakely, {S. P.} and Weiner, {O. M.} and A. Weinstein and A. Wilhelm and Williams, {D. A.} and S. Fegan and B. Giebels and D. Horan and A. Berdyugin and J. Kuan and E. Lindfors and K. Nilsson and A. Oksanen and H. Prokoph and R. Reinthal and L. Takalo and F. Zefi",

year = "2017",

month = feb,

day = "20",

doi = "10.3847/1538-4357/836/2/205",

language = "English (US)",

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journal = "Astrophysical Journal",

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TY - JOUR

T1 - A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30

AU - Abeysekara, A. U.

AU - Archambault, S.

AU - Archer, A.

AU - Benbow, W.

AU - Bird, R.

AU - Buchovecky, M.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Byrum, K.

AU - Cerruti, M.

AU - Chen, X.

AU - Ciupik, L.

AU - Cui, W.

AU - Dickinson, H. J.

AU - Eisch, J. D.

AU - Errando, M.

AU - Falcone, A.

AU - Feng, Q.

AU - Finley, J. P.

AU - Fleischhack, H.

AU - Fortson, L.

AU - Furniss, A.

AU - Gillanders, G. H.

AU - Griffin, S.

AU - Grube, J.

AU - Hütten, M.

AU - Håkansson, N.

AU - Hanna, D.

AU - Holder, J.

AU - Humensky, T. B.

AU - Johnson, C. A.

AU - Kaaret, P.

AU - Kar, P.

AU - Kertzman, M.

AU - Kieda, D.

AU - Krause, M.

AU - Krennrich, F.

AU - Kumar, S.

AU - Lang, M. J.

AU - Maier, G.

AU - McArthur, S.

AU - McCann, A.

AU - Meagher, K.

AU - Moriarty, P.

AU - Mukherjee, R.

AU - Nguyen, T.

AU - Nieto, D.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Park, N.

AU - Pelassa, V.

AU - Pohl, M.

AU - Popkow, A.

AU - Pueschel, E.

AU - Quinn, J.

AU - Ragan, K.

AU - Reynolds, P. T.

AU - Richards, G. T.

AU - Roache, E.

AU - Rulten, C.

AU - Santander, M.

AU - Sembroski, G. H.

AU - Shahinyan, K.

AU - Staszak, D.

AU - Telezhinsky, I.

AU - Tucci, J. V.

AU - Tyler, J.

AU - Wakely, S. P.

AU - Weiner, O. M.

AU - Weinstein, A.

AU - Wilhelm, A.

AU - Williams, D. A.

AU - Fegan, S.

AU - Giebels, B.

AU - Horan, D.

AU - Berdyugin, A.

AU - Kuan, J.

AU - Lindfors, E.

AU - Nilsson, K.

AU - Oksanen, A.

AU - Prokoph, H.

AU - Reinthal, R.

AU - Takalo, L.

AU - Zefi, F.

PY - 2017/2/20

Y1 - 2017/2/20

N2 - B2 1215+30 is a BL-Lac-type blazar that was first detected at TeV energies by the MAGIC atmospheric Cherenkov telescopes and subsequently confirmed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) observatory with data collected between 2009 and 2012. In 2014 February 08, VERITAS detected a large-amplitude flare from B2 1215+30 during routine monitoring observations of the blazar 1ES 1218 +304, located in the same field of view. The TeV flux reached 2.4 times the Crab Nebula flux with a variability timescale of <3.6 hr. Multiwavelength observations with Fermi-LAT, Swift, and the Tuorla Observatory revealed a correlated high GeV flux state and no significant optical counterpart to the flare, with a spectral energy distribution where the gamma-ray luminosity exceeds the synchrotron luminosity. When interpreted in the framework of a onezone leptonic model, the observed emission implies a high degree of beaming, with Doppler factor δ > 10, and an electron population with spectral index p < 2.3.

AB - B2 1215+30 is a BL-Lac-type blazar that was first detected at TeV energies by the MAGIC atmospheric Cherenkov telescopes and subsequently confirmed by the Very Energetic Radiation Imaging Telescope Array System (VERITAS) observatory with data collected between 2009 and 2012. In 2014 February 08, VERITAS detected a large-amplitude flare from B2 1215+30 during routine monitoring observations of the blazar 1ES 1218 +304, located in the same field of view. The TeV flux reached 2.4 times the Crab Nebula flux with a variability timescale of <3.6 hr. Multiwavelength observations with Fermi-LAT, Swift, and the Tuorla Observatory revealed a correlated high GeV flux state and no significant optical counterpart to the flare, with a spectral energy distribution where the gamma-ray luminosity exceeds the synchrotron luminosity. When interpreted in the framework of a onezone leptonic model, the observed emission implies a high degree of beaming, with Doppler factor δ > 10, and an electron population with spectral index p < 2.3.

KW - BL Lacertae objects: individual (B2 1215+30, VER J1217+301)

KW - galaxies: active

KW - galaxies: jets

KW - galaxies: nuclei

KW - gamma rays: galaxies

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UR - http://www.scopus.com/inward/citedby.url?scp=85014395755&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/836/2/205

DO - 10.3847/1538-4357/836/2/205

M3 - Article

AN - SCOPUS:85014395755

SN - 0004-637X

VL - 836

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 205

ER -

A Luminous and Isolated Gamma-Ray Flare from the Blazar B2 1215+30

Abstract

Bibliographical note

Keywords

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