GAMMA-RAYS from the QUASAR PKS 1441+25: STORY of AN ESCAPE

A. U. Abeysekara; S. Archambault; A. Archer; T. Aune; A. Barnacka; W. Benbow; R. Bird; J. Biteau; J. H. Buckley; V. Bugaev; J. V. Cardenzana; M. Cerruti; X. Chen; J. L. Christiansen; L. Ciupik; M. P. Connolly; P. Coppi; W. Cui; H. J. Dickinson; J. Dumm; J. D. Eisch; M. Errando; A. Falcone; Q. Feng; J. P. Finley; H. Fleischhack; A. Flinders; P. Fortin; L. Fortson; A. Furniss; G. H. Gillanders; S. Griffin; J. Grube; G. Gyuk; M. Hütten; N. Håkansson; D. Hanna; J. Holder; T. B. Humensky; C. A. Johnson; P. Kaaret; P. Kar; N. Kelley-Hoskins; Y. Khassen; D. Kieda; M. Krause; F. Krennrich; S. Kumar; M. J. Lang; G. Maier; S. McArthur; A. McCann; K. Meagher; P. Moriarty; R. Mukherjee; D. Nieto; A. O Faoláin De Bhróithe; R. A. Ong; A. N. Otte; N. Park; J. S. Perkins; A. Petrashyk; M. Pohl; A. Popkow; E. Pueschel; J. Quinn; K. Ragan; G. Ratliff; P. T. Reynolds; G. T. Richards; E. Roache; J. Rousselle; M. Santander; G. H. Sembroski; K. Shahinyan; A. W. Smith; D. Staszak; I. Telezhinsky; N. W. Todd; J. V. Tucci; J. Tyler; V. V. Vassiliev; S. Vincent; S. P. Wakely; O. M. Weiner; A. Weinstein; A. Wilhelm; D. A. Williams; B. Zitzer; P. S. Smith; T. W S Holoien; J. L. Prieto; C. S. Kochanek; K. Z. Stanek; B. Shappee; T. Hovatta; W. Max-Moerbeck; T. J. Pearson; R. A. Reeves; J. L. Richards; A. C S Readhead; G. M. Madejski; S. G. Djorgovski; A. J. Drake; M. J. Graham; A. Mahabal

doi:10.1088/2041-8205/815/2/L22

GAMMA-RAYS from the QUASAR PKS 1441+25: STORY of AN ESCAPE

A. U. Abeysekara, S. Archambault, A. Archer, T. Aune, A. Barnacka, W. Benbow, R. Bird, J. Biteau, J. H. Buckley, V. Bugaev, J. V. Cardenzana, M. Cerruti, X. Chen, J. L. Christiansen, L. Ciupik, M. P. Connolly, P. Coppi, W. Cui, H. J. Dickinson, J. DummJ. D. Eisch, M. Errando, A. Falcone, Q. Feng, J. P. Finley, H. Fleischhack, A. Flinders, P. Fortin, L. Fortson, A. Furniss, G. H. Gillanders, S. Griffin, J. Grube, G. Gyuk, M. Hütten, N. Håkansson, D. Hanna, J. Holder, T. B. Humensky, C. A. Johnson, P. Kaaret, P. Kar, N. Kelley-Hoskins, Y. Khassen, D. Kieda, M. Krause, F. Krennrich, S. Kumar, M. J. Lang, G. Maier, S. McArthur, A. McCann, K. Meagher, P. Moriarty, R. Mukherjee, D. Nieto, A. O Faoláin De Bhróithe, R. A. Ong, A. N. Otte, N. Park, J. S. Perkins, A. Petrashyk, M. Pohl, A. Popkow, E. Pueschel, J. Quinn, K. Ragan, G. Ratliff, P. T. Reynolds, G. T. Richards, E. Roache, J. Rousselle, M. Santander, G. H. Sembroski, K. Shahinyan, A. W. Smith, D. Staszak, I. Telezhinsky, N. W. Todd, J. V. Tucci, J. Tyler, V. V. Vassiliev, S. Vincent, S. P. Wakely, O. M. Weiner, A. Weinstein, A. Wilhelm, D. A. Williams, B. Zitzer, P. S. Smith, T. W S Holoien, J. L. Prieto, C. S. Kochanek, K. Z. Stanek, B. Shappee, T. Hovatta, W. Max-Moerbeck, T. J. Pearson, R. A. Reeves, J. L. Richards, A. C S Readhead, G. M. Madejski, S. G. Djorgovski, A. J. Drake, M. J. Graham, A. Mahabal

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe. The detection of significant emission above 100 GeV from a distant quasar would show that some of the radiated gamma-rays escape pair-production interactions with low-energy photons, be it the extragalactic background light (EBL), or the radiation near the supermassive black hole lying at the jet's base. VERITAS detected gamma-ray emission up to ∼200 GeV from PKS 1441+25 (z = 0.939) during 2015 April, a period of high activity across all wavelengths. This observation of PKS 1441+25 suggests that the emission region is located thousands of Schwarzschild radii away from the black hole. The gamma-ray detection also sets a stringent upper limit on the near-ultraviolet to near-infrared EBL intensity, suggesting that galaxy surveys have resolved most, if not all, of the sources of the EBL at these wavelengths.

Original language	English (US)
Article number	L22
Journal	Astrophysical Journal Letters
Volume	815
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/815/2/L22
State	Published - Dec 20 2015

Bibliographical note

Publisher Copyright:
© 2015. The American Astronomical Society. All rights reserved.

Keywords

cosmology: observations
diffuse radiation
gamma rays: galaxies
quasars: individual (PKS 1441+25=VER J1443+250)
radiation mechanisms: non-thermal

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Abeysekara, A. U., Archambault, S., Archer, A., Aune, T., Barnacka, A., Benbow, W., Bird, R., Biteau, J., Buckley, J. H., Bugaev, V., Cardenzana, J. V., Cerruti, M., Chen, X., Christiansen, J. L., Ciupik, L., Connolly, M. P., Coppi, P., Cui, W., Dickinson, H. J., ... Mahabal, A. (2015). GAMMA-RAYS from the QUASAR PKS 1441+25: STORY of AN ESCAPE. Astrophysical Journal Letters, 815(2), Article L22. https://doi.org/10.1088/2041-8205/815/2/L22

Abeysekara, AU, Archambault, S, Archer, A, Aune, T, Barnacka, A, Benbow, W, Bird, R, Biteau, J, Buckley, JH, Bugaev, V, Cardenzana, JV, Cerruti, M, Chen, X, Christiansen, JL, Ciupik, L, Connolly, MP, Coppi, P, Cui, W, Dickinson, HJ, Dumm, J, Eisch, JD, Errando, M, Falcone, A, Feng, Q, Finley, JP, Fleischhack, H, Flinders, A, Fortin, P, Fortson, L, Furniss, A, Gillanders, GH, Griffin, S, Grube, J, Gyuk, G, Hütten, M, Håkansson, N, Hanna, D, Holder, J, Humensky, TB, Johnson, CA, Kaaret, P, Kar, P, Kelley-Hoskins, N, Khassen, Y, Kieda, D, Krause, M, Krennrich, F, Kumar, S, Lang, MJ, Maier, G, McArthur, S, McCann, A, Meagher, K, Moriarty, P, Mukherjee, R, Nieto, D, De Bhróithe, AOF, Ong, RA, Otte, AN, Park, N, Perkins, JS, Petrashyk, A, Pohl, M, Popkow, A, Pueschel, E, Quinn, J, Ragan, K, Ratliff, G, Reynolds, PT, Richards, GT, Roache, E, Rousselle, J, Santander, M, Sembroski, GH, Shahinyan, K, Smith, AW, Staszak, D, Telezhinsky, I, Todd, NW, Tucci, JV, Tyler, J, Vassiliev, VV, Vincent, S, Wakely, SP, Weiner, OM, Weinstein, A, Wilhelm, A, Williams, DA, Zitzer, B, Smith, PS, Holoien, TWS, Prieto, JL, Kochanek, CS, Stanek, KZ, Shappee, B, Hovatta, T, Max-Moerbeck, W, Pearson, TJ, Reeves, RA, Richards, JL, Readhead, ACS, Madejski, GM, Djorgovski, SG, Drake, AJ, Graham, MJ & Mahabal, A 2015, 'GAMMA-RAYS from the QUASAR PKS 1441+25: STORY of AN ESCAPE', Astrophysical Journal Letters, vol. 815, no. 2, L22. https://doi.org/10.1088/2041-8205/815/2/L22

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abstract = "Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe. The detection of significant emission above 100 GeV from a distant quasar would show that some of the radiated gamma-rays escape pair-production interactions with low-energy photons, be it the extragalactic background light (EBL), or the radiation near the supermassive black hole lying at the jet's base. VERITAS detected gamma-ray emission up to ∼200 GeV from PKS 1441+25 (z = 0.939) during 2015 April, a period of high activity across all wavelengths. This observation of PKS 1441+25 suggests that the emission region is located thousands of Schwarzschild radii away from the black hole. The gamma-ray detection also sets a stringent upper limit on the near-ultraviolet to near-infrared EBL intensity, suggesting that galaxy surveys have resolved most, if not all, of the sources of the EBL at these wavelengths.",

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T1 - GAMMA-RAYS from the QUASAR PKS 1441+25

T2 - STORY of AN ESCAPE

AU - Abeysekara, A. U.

AU - Archambault, S.

AU - Archer, A.

AU - Aune, T.

AU - Barnacka, A.

AU - Benbow, W.

AU - Bird, R.

AU - Biteau, J.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Cardenzana, J. V.

AU - Cerruti, M.

AU - Chen, X.

AU - Christiansen, J. L.

AU - Ciupik, L.

AU - Connolly, M. P.

AU - Coppi, P.

AU - Cui, W.

AU - Dickinson, H. J.

AU - Dumm, J.

AU - Eisch, J. D.

AU - Errando, M.

AU - Falcone, A.

AU - Feng, Q.

AU - Finley, J. P.

AU - Fleischhack, H.

AU - Flinders, A.

AU - Fortin, P.

AU - Fortson, L.

AU - Furniss, A.

AU - Gillanders, G. H.

AU - Griffin, S.

AU - Grube, J.

AU - Gyuk, G.

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 - Kelley-Hoskins, N.

AU - Khassen, Y.

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 - Nieto, D.

AU - De Bhróithe, A. O Faoláin

AU - Ong, R. A.

AU - Otte, A. N.

AU - Park, N.

AU - Perkins, J. S.

AU - Petrashyk, A.

AU - Pohl, M.

AU - Popkow, A.

AU - Pueschel, E.

AU - Quinn, J.

AU - Ragan, K.

AU - Ratliff, G.

AU - Reynolds, P. T.

AU - Richards, G. T.

AU - Roache, E.

AU - Rousselle, J.

AU - Santander, M.

AU - Sembroski, G. H.

AU - Shahinyan, K.

AU - Smith, A. W.

AU - Staszak, D.

AU - Telezhinsky, I.

AU - Todd, N. W.

AU - Tucci, J. V.

AU - Tyler, J.

AU - Vassiliev, V. V.

AU - Vincent, S.

AU - Wakely, S. P.

AU - Weiner, O. M.

AU - Weinstein, A.

AU - Wilhelm, A.

AU - Williams, D. A.

AU - Zitzer, B.

AU - Smith, P. S.

AU - Holoien, T. W S

AU - Prieto, J. L.

AU - Kochanek, C. S.

AU - Stanek, K. Z.

AU - Shappee, B.

AU - Hovatta, T.

AU - Max-Moerbeck, W.

AU - Pearson, T. J.

AU - Reeves, R. A.

AU - Richards, J. L.

AU - Readhead, A. C S

AU - Madejski, G. M.

AU - Djorgovski, S. G.

AU - Drake, A. J.

AU - Graham, M. J.

AU - Mahabal, A.

PY - 2015/12/20

Y1 - 2015/12/20

N2 - Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe. The detection of significant emission above 100 GeV from a distant quasar would show that some of the radiated gamma-rays escape pair-production interactions with low-energy photons, be it the extragalactic background light (EBL), or the radiation near the supermassive black hole lying at the jet's base. VERITAS detected gamma-ray emission up to ∼200 GeV from PKS 1441+25 (z = 0.939) during 2015 April, a period of high activity across all wavelengths. This observation of PKS 1441+25 suggests that the emission region is located thousands of Schwarzschild radii away from the black hole. The gamma-ray detection also sets a stringent upper limit on the near-ultraviolet to near-infrared EBL intensity, suggesting that galaxy surveys have resolved most, if not all, of the sources of the EBL at these wavelengths.

AB - Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe. The detection of significant emission above 100 GeV from a distant quasar would show that some of the radiated gamma-rays escape pair-production interactions with low-energy photons, be it the extragalactic background light (EBL), or the radiation near the supermassive black hole lying at the jet's base. VERITAS detected gamma-ray emission up to ∼200 GeV from PKS 1441+25 (z = 0.939) during 2015 April, a period of high activity across all wavelengths. This observation of PKS 1441+25 suggests that the emission region is located thousands of Schwarzschild radii away from the black hole. The gamma-ray detection also sets a stringent upper limit on the near-ultraviolet to near-infrared EBL intensity, suggesting that galaxy surveys have resolved most, if not all, of the sources of the EBL at these wavelengths.

KW - cosmology: observations

KW - diffuse radiation

KW - gamma rays: galaxies

KW - quasars: individual (PKS 1441+25=VER J1443+250)

KW - radiation mechanisms: non-thermal

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UR - http://www.scopus.com/inward/citedby.url?scp=84951810477&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/815/2/L22

DO - 10.1088/2041-8205/815/2/L22

M3 - Article

AN - SCOPUS:84951810477

SN - 2041-8205

VL - 815

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L22

ER -

GAMMA-RAYS from the QUASAR PKS 1441+25: STORY of AN ESCAPE

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Keywords

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