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 & 86 others J. D. Eisch, M. Errando, Abraham David 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

Research output: Contribution to journalArticle

39 Citations (Scopus)

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 languageEnglish (US)
Article numberL22
JournalAstrophysical Journal Letters
Volume815
Issue number2
DOIs
StatePublished - Dec 20 2015

Fingerprint

gamma rays
quasars
wavelength
diffuse radiation
light intensity
outburst
near infrared
fill
pair production
active galactic nuclei
wavelengths
radiation distribution
luminous intensity
escape
universe
galaxies
radii
energy
photons
radiation

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Abeysekara, A. U., Archambault, S., Archer, A., Aune, T., Barnacka, A., Benbow, W., ... Mahabal, A. (2015). GAMMA-RAYS from the QUASAR PKS 1441+25: STORY of AN ESCAPE. Astrophysical Journal Letters, 815(2), [L22]. https://doi.org/10.1088/2041-8205/815/2/L22
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. ; Dumm, J. ; Eisch, J. D. ; Errando, M. ; Falcone, Abraham David ; Feng, Q. ; Finley, J. P. ; Fleischhack, H. ; Flinders, A. ; Fortin, P. ; Fortson, L. ; Furniss, A. ; Gillanders, G. H. ; Griffin, S. ; Grube, J. ; Gyuk, G. ; Hütten, M. ; Håkansson, N. ; Hanna, D. ; Holder, J. ; Humensky, T. B. ; Johnson, C. A. ; Kaaret, P. ; Kar, P. ; Kelley-Hoskins, N. ; Khassen, Y. ; Kieda, D. ; Krause, M. ; Krennrich, F. ; Kumar, S. ; Lang, M. J. ; Maier, G. ; McArthur, S. ; McCann, A. ; Meagher, K. ; Moriarty, P. ; Mukherjee, R. ; Nieto, D. ; De Bhróithe, A. O.Faoláin ; Ong, R. A. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Petrashyk, A. ; Pohl, M. ; Popkow, A. ; Pueschel, E. ; Quinn, J. ; Ragan, K. ; Ratliff, G. ; Reynolds, P. T. ; Richards, G. T. ; Roache, E. ; Rousselle, J. ; Santander, M. ; Sembroski, G. H. ; Shahinyan, K. ; Smith, A. W. ; Staszak, D. ; Telezhinsky, I. ; Todd, N. W. ; Tucci, J. V. ; Tyler, J. ; Vassiliev, V. V. ; Vincent, S. ; Wakely, S. P. ; Weiner, O. M. ; Weinstein, A. ; Wilhelm, A. ; Williams, D. A. ; Zitzer, B. ; Smith, P. S. ; Holoien, T. W.S. ; Prieto, J. L. ; Kochanek, C. S. ; Stanek, K. Z. ; Shappee, B. ; Hovatta, T. ; Max-Moerbeck, W. ; Pearson, T. J. ; Reeves, R. A. ; Richards, J. L. ; Readhead, A. C.S. ; Madejski, G. M. ; Djorgovski, S. G. ; Drake, A. J. ; Graham, M. J. ; Mahabal, A. / GAMMA-RAYS from the QUASAR PKS 1441+25 : STORY of AN ESCAPE. In: Astrophysical Journal Letters. 2015 ; Vol. 815, No. 2.
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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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GAMMA-RAYS from the QUASAR PKS 1441+25 : STORY of AN ESCAPE. / 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.; Dumm, J.; Eisch, J. D.; Errando, M.; Falcone, Abraham David; Feng, Q.; Finley, J. P.; Fleischhack, H.; Flinders, A.; Fortin, P.; Fortson, L.; Furniss, A.; Gillanders, G. H.; Griffin, S.; Grube, J.; Gyuk, G.; Hütten, M.; Håkansson, N.; Hanna, D.; Holder, J.; Humensky, T. B.; Johnson, C. A.; Kaaret, P.; Kar, P.; Kelley-Hoskins, N.; Khassen, Y.; Kieda, D.; Krause, M.; Krennrich, F.; Kumar, S.; Lang, M. J.; Maier, G.; McArthur, S.; McCann, A.; Meagher, K.; Moriarty, P.; Mukherjee, R.; Nieto, D.; De Bhróithe, A. O.Faoláin; Ong, R. A.; Otte, A. N.; Park, N.; Perkins, J. S.; Petrashyk, A.; Pohl, M.; Popkow, A.; Pueschel, E.; Quinn, J.; Ragan, K.; Ratliff, G.; Reynolds, P. T.; Richards, G. T.; Roache, E.; Rousselle, J.; Santander, M.; Sembroski, G. H.; Shahinyan, K.; Smith, A. W.; Staszak, D.; Telezhinsky, I.; Todd, N. W.; Tucci, J. V.; Tyler, J.; Vassiliev, V. V.; Vincent, S.; Wakely, S. P.; Weiner, O. M.; Weinstein, A.; Wilhelm, A.; Williams, D. A.; Zitzer, B.; Smith, P. S.; Holoien, T. W.S.; Prieto, J. L.; Kochanek, C. S.; Stanek, K. Z.; Shappee, B.; Hovatta, T.; Max-Moerbeck, W.; Pearson, T. J.; Reeves, R. A.; Richards, J. L.; Readhead, A. C.S.; Madejski, G. M.; Djorgovski, S. G.; Drake, A. J.; Graham, M. J.; Mahabal, A.

In: Astrophysical Journal Letters, Vol. 815, No. 2, L22, 20.12.2015.

Research output: Contribution to journalArticle

TY - JOUR

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, Abraham David

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.

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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

VL - 815

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 2

M1 - L22

ER -

Abeysekara AU, Archambault S, Archer A, Aune T, Barnacka A, Benbow W et al. GAMMA-RAYS from the QUASAR PKS 1441+25: STORY of AN ESCAPE. Astrophysical Journal Letters. 2015 Dec 20;815(2). L22. https://doi.org/10.1088/2041-8205/815/2/L22