Discovery of very high energy gamma rays from 1ES 1440+122

S. Archambault, A. Archer, A. Barnacka, B. Behera, M. Beilicke, W. Benbow, K. Berger, R. Bird, M. Böttcher, J. H. Buckley, V. Bugaev, J. V. Cardenzana, M. Cerruti, X. Chen, J. L. Christiansen, L. Ciupik, E. Collins-Hughes, M. P. Connolly, W. Cui, H. J. DickinsonJ. Dumm, J. D. Eisch, M. Errando, A. Falcone, S. Federici, Q. Feng, J. P. Finley, H. Fleischhack, L. Fortson, A. Furniss, G. H. Gillanders, S. Godambe, S. Griffin, S. T. Griffiths, J. Grube, G. Gyuk, N. Håkansson, D. Hanna, J. Holder, G. Hughes, C. A. Johnson, P. Kaaret, P. Kar, M. Kertzman, Y. Khassen, D. Kieda, H. Krawczynski, S. Kumar, M. J. Lang, A. S Madhavan, G. Maier, S. McArthur, A. McCann, K. Meagher, J. Millis, P. Moriarty, T. Nelson, D. Nieto, A. O'Faoláin de Bhróithe, R. A. Ong, A. N. Otte, N. Park, J. S. Perkins, M. Pohl, A. Popkow, H. Prokoph, E. Pueschel, J. Quinn, K. Ragan, J. Rajotte, L. C. Reyes, P. T. Reynolds, G. T. Richards, E. Roache, G. H. Sembroski, K. Shahinyan, A. W. Smith, D. Staszak, K. Sweeney, I. Telezhinsky, J. V. Tucci, J. Tyler, A. Varlotta, V. V. Vassiliev, S. P. Wakely, R. Welsing, A. Wilhelm, D. A. Williams, B. Zitzer

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The BL Lacertae object 1ES 1440+122 was observed in the energy range from 85 GeV to 30 TeV by the VERITAS array of imaging atmospheric Cherenkov telescopes. The observations, taken between 2008 May and 2010 June and totalling 53 h, resulted in the discovery of γ -ray emission from the blazar, which has a redshift z = 0.163. 1ES 1440+122 is detected at a statistical significance of 5.5 standard deviations above the background with an integral flux of (2.8 ± 0.7stat ± 0.8sys) × 10-12 cm-2 s-1 (1.2 per cent of the Crab Nebula's flux) above 200 GeV. The measured spectrum is described well by a power law from 0.2 to 1.3 TeV with a photon index of 3.1 ± 0.4stat ± 0.2sys. Quasi-simultaneous multiwavelength data from the Fermi Large Area Telescope (0.3-300 GeV) and the Swift X-ray Telescope (0.2-10 keV) are additionally used to model the properties of the emission region. A synchrotron self-Compton model produces a good representation of the multiwavelength data. Adding an external-Compton or a hadronic component also adequately describes the data.

Original languageEnglish (US)
Pages (from-to)202-208
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume461
Issue number1
DOIs
StatePublished - Sep 1 2016

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gamma rays
telescopes
BL Lacertae objects
energy
Crab nebula
crab
standard deviation
rays
synchrotrons
power law
photons
x rays
index

Keywords

  • BL Lacertae objects: general
  • Gamma-rays: general

Cite this

Archambault, S., Archer, A., Barnacka, A., Behera, B., Beilicke, M., Benbow, W., ... Zitzer, B. (2016). Discovery of very high energy gamma rays from 1ES 1440+122. Monthly Notices of the Royal Astronomical Society, 461(1), 202-208. https://doi.org/10.1093/mnras/stw1319

Discovery of very high energy gamma rays from 1ES 1440+122. / Archambault, S.; Archer, A.; Barnacka, A.; Behera, B.; Beilicke, M.; Benbow, W.; Berger, K.; Bird, R.; Böttcher, M.; Buckley, J. H.; Bugaev, V.; Cardenzana, J. V.; Cerruti, M.; Chen, X.; Christiansen, J. L.; Ciupik, L.; Collins-Hughes, E.; Connolly, M. P.; Cui, W.; Dickinson, H. J.; Dumm, J.; Eisch, J. D.; Errando, M.; Falcone, A.; Federici, S.; Feng, Q.; Finley, J. P.; Fleischhack, H.; Fortson, L.; Furniss, A.; Gillanders, G. H.; Godambe, S.; Griffin, S.; Griffiths, S. T.; Grube, J.; Gyuk, G.; Håkansson, N.; Hanna, D.; Holder, J.; Hughes, G.; Johnson, C. A.; Kaaret, P.; Kar, P.; Kertzman, M.; Khassen, Y.; Kieda, D.; Krawczynski, H.; Kumar, S.; Lang, M. J.; S Madhavan, A.; Maier, G.; McArthur, S.; McCann, A.; Meagher, K.; Millis, J.; Moriarty, P.; Nelson, T.; Nieto, D.; O'Faoláin de Bhróithe, A.; Ong, R. A.; Otte, A. N.; Park, N.; Perkins, J. S.; Pohl, M.; Popkow, A.; Prokoph, H.; Pueschel, E.; Quinn, J.; Ragan, K.; Rajotte, J.; Reyes, L. C.; Reynolds, P. T.; Richards, G. T.; Roache, E.; Sembroski, G. H.; Shahinyan, K.; Smith, A. W.; Staszak, D.; Sweeney, K.; Telezhinsky, I.; Tucci, J. V.; Tyler, J.; Varlotta, A.; Vassiliev, V. V.; Wakely, S. P.; Welsing, R.; Wilhelm, A.; Williams, D. A.; Zitzer, B.

In: Monthly Notices of the Royal Astronomical Society, Vol. 461, No. 1, 01.09.2016, p. 202-208.

Research output: Contribution to journalArticle

Archambault, S, Archer, A, Barnacka, A, Behera, B, Beilicke, M, Benbow, W, Berger, K, Bird, R, Böttcher, M, Buckley, JH, Bugaev, V, Cardenzana, JV, Cerruti, M, Chen, X, Christiansen, JL, Ciupik, L, Collins-Hughes, E, Connolly, MP, Cui, W, Dickinson, HJ, Dumm, J, Eisch, JD, Errando, M, Falcone, A, Federici, S, Feng, Q, Finley, JP, Fleischhack, H, Fortson, L, Furniss, A, Gillanders, GH, Godambe, S, Griffin, S, Griffiths, ST, Grube, J, Gyuk, G, Håkansson, N, Hanna, D, Holder, J, Hughes, G, Johnson, CA, Kaaret, P, Kar, P, Kertzman, M, Khassen, Y, Kieda, D, Krawczynski, H, Kumar, S, Lang, MJ, S Madhavan, A, Maier, G, McArthur, S, McCann, A, Meagher, K, Millis, J, Moriarty, P, Nelson, T, Nieto, D, O'Faoláin de Bhróithe, A, Ong, RA, Otte, AN, Park, N, Perkins, JS, Pohl, M, Popkow, A, Prokoph, H, Pueschel, E, Quinn, J, Ragan, K, Rajotte, J, Reyes, LC, Reynolds, PT, Richards, GT, Roache, E, Sembroski, GH, Shahinyan, K, Smith, AW, Staszak, D, Sweeney, K, Telezhinsky, I, Tucci, JV, Tyler, J, Varlotta, A, Vassiliev, VV, Wakely, SP, Welsing, R, Wilhelm, A, Williams, DA & Zitzer, B 2016, 'Discovery of very high energy gamma rays from 1ES 1440+122', Monthly Notices of the Royal Astronomical Society, vol. 461, no. 1, pp. 202-208. https://doi.org/10.1093/mnras/stw1319
Archambault S, Archer A, Barnacka A, Behera B, Beilicke M, Benbow W et al. Discovery of very high energy gamma rays from 1ES 1440+122. Monthly Notices of the Royal Astronomical Society. 2016 Sep 1;461(1):202-208. https://doi.org/10.1093/mnras/stw1319
Archambault, S. ; Archer, A. ; Barnacka, A. ; Behera, B. ; Beilicke, M. ; Benbow, W. ; Berger, K. ; Bird, R. ; Böttcher, M. ; Buckley, J. H. ; Bugaev, V. ; Cardenzana, J. V. ; Cerruti, M. ; Chen, X. ; Christiansen, J. L. ; Ciupik, L. ; Collins-Hughes, E. ; Connolly, M. P. ; Cui, W. ; Dickinson, H. J. ; Dumm, J. ; Eisch, J. D. ; Errando, M. ; Falcone, A. ; Federici, S. ; Feng, Q. ; Finley, J. P. ; Fleischhack, H. ; Fortson, L. ; Furniss, A. ; Gillanders, G. H. ; Godambe, S. ; Griffin, S. ; Griffiths, S. T. ; Grube, J. ; Gyuk, G. ; Håkansson, N. ; Hanna, D. ; Holder, J. ; Hughes, G. ; Johnson, C. A. ; Kaaret, P. ; Kar, P. ; Kertzman, M. ; Khassen, Y. ; Kieda, D. ; Krawczynski, H. ; Kumar, S. ; Lang, M. J. ; S Madhavan, A. ; Maier, G. ; McArthur, S. ; McCann, A. ; Meagher, K. ; Millis, J. ; Moriarty, P. ; Nelson, T. ; Nieto, D. ; O'Faoláin de Bhróithe, A. ; Ong, R. A. ; Otte, A. N. ; Park, N. ; Perkins, J. S. ; Pohl, M. ; Popkow, A. ; Prokoph, H. ; Pueschel, E. ; Quinn, J. ; Ragan, K. ; Rajotte, J. ; Reyes, L. C. ; Reynolds, P. T. ; Richards, G. T. ; Roache, E. ; Sembroski, G. H. ; Shahinyan, K. ; Smith, A. W. ; Staszak, D. ; Sweeney, K. ; Telezhinsky, I. ; Tucci, J. V. ; Tyler, J. ; Varlotta, A. ; Vassiliev, V. V. ; Wakely, S. P. ; Welsing, R. ; Wilhelm, A. ; Williams, D. A. ; Zitzer, B. / Discovery of very high energy gamma rays from 1ES 1440+122. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 461, No. 1. pp. 202-208.
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abstract = "The BL Lacertae object 1ES 1440+122 was observed in the energy range from 85 GeV to 30 TeV by the VERITAS array of imaging atmospheric Cherenkov telescopes. The observations, taken between 2008 May and 2010 June and totalling 53 h, resulted in the discovery of γ -ray emission from the blazar, which has a redshift z = 0.163. 1ES 1440+122 is detected at a statistical significance of 5.5 standard deviations above the background with an integral flux of (2.8 ± 0.7stat ± 0.8sys) × 10-12 cm-2 s-1 (1.2 per cent of the Crab Nebula's flux) above 200 GeV. The measured spectrum is described well by a power law from 0.2 to 1.3 TeV with a photon index of 3.1 ± 0.4stat ± 0.2sys. Quasi-simultaneous multiwavelength data from the Fermi Large Area Telescope (0.3-300 GeV) and the Swift X-ray Telescope (0.2-10 keV) are additionally used to model the properties of the emission region. A synchrotron self-Compton model produces a good representation of the multiwavelength data. Adding an external-Compton or a hadronic component also adequately describes the data.",
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TY - JOUR

T1 - Discovery of very high energy gamma rays from 1ES 1440+122

AU - Archambault, S.

AU - Archer, A.

AU - Barnacka, A.

AU - Behera, B.

AU - Beilicke, M.

AU - Benbow, W.

AU - Berger, K.

AU - Bird, R.

AU - Böttcher, M.

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 - Collins-Hughes, E.

AU - Connolly, M. P.

AU - Cui, W.

AU - Dickinson, H. J.

AU - Dumm, J.

AU - Eisch, J. D.

AU - Errando, M.

AU - Falcone, A.

AU - Federici, S.

AU - Feng, Q.

AU - Finley, J. P.

AU - Fleischhack, H.

AU - Fortson, L.

AU - Furniss, A.

AU - Gillanders, G. H.

AU - Godambe, S.

AU - Griffin, S.

AU - Griffiths, S. T.

AU - Grube, J.

AU - Gyuk, G.

AU - Håkansson, N.

AU - Hanna, D.

AU - Holder, J.

AU - Hughes, G.

AU - Johnson, C. A.

AU - Kaaret, P.

AU - Kar, P.

AU - Kertzman, M.

AU - Khassen, Y.

AU - Kieda, D.

AU - Krawczynski, H.

AU - Kumar, S.

AU - Lang, M. J.

AU - S Madhavan, A.

AU - Maier, G.

AU - McArthur, S.

AU - McCann, A.

AU - Meagher, K.

AU - Millis, J.

AU - Moriarty, P.

AU - Nelson, T.

AU - Nieto, D.

AU - O'Faoláin de Bhróithe, A.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Park, N.

AU - Perkins, J. S.

AU - Pohl, M.

AU - Popkow, A.

AU - Prokoph, H.

AU - Pueschel, E.

AU - Quinn, J.

AU - Ragan, K.

AU - Rajotte, J.

AU - Reyes, L. C.

AU - Reynolds, P. T.

AU - Richards, G. T.

AU - Roache, E.

AU - Sembroski, G. H.

AU - Shahinyan, K.

AU - Smith, A. W.

AU - Staszak, D.

AU - Sweeney, K.

AU - Telezhinsky, I.

AU - Tucci, J. V.

AU - Tyler, J.

AU - Varlotta, A.

AU - Vassiliev, V. V.

AU - Wakely, S. P.

AU - Welsing, R.

AU - Wilhelm, A.

AU - Williams, D. A.

AU - Zitzer, B.

PY - 2016/9/1

Y1 - 2016/9/1

N2 - The BL Lacertae object 1ES 1440+122 was observed in the energy range from 85 GeV to 30 TeV by the VERITAS array of imaging atmospheric Cherenkov telescopes. The observations, taken between 2008 May and 2010 June and totalling 53 h, resulted in the discovery of γ -ray emission from the blazar, which has a redshift z = 0.163. 1ES 1440+122 is detected at a statistical significance of 5.5 standard deviations above the background with an integral flux of (2.8 ± 0.7stat ± 0.8sys) × 10-12 cm-2 s-1 (1.2 per cent of the Crab Nebula's flux) above 200 GeV. The measured spectrum is described well by a power law from 0.2 to 1.3 TeV with a photon index of 3.1 ± 0.4stat ± 0.2sys. Quasi-simultaneous multiwavelength data from the Fermi Large Area Telescope (0.3-300 GeV) and the Swift X-ray Telescope (0.2-10 keV) are additionally used to model the properties of the emission region. A synchrotron self-Compton model produces a good representation of the multiwavelength data. Adding an external-Compton or a hadronic component also adequately describes the data.

AB - The BL Lacertae object 1ES 1440+122 was observed in the energy range from 85 GeV to 30 TeV by the VERITAS array of imaging atmospheric Cherenkov telescopes. The observations, taken between 2008 May and 2010 June and totalling 53 h, resulted in the discovery of γ -ray emission from the blazar, which has a redshift z = 0.163. 1ES 1440+122 is detected at a statistical significance of 5.5 standard deviations above the background with an integral flux of (2.8 ± 0.7stat ± 0.8sys) × 10-12 cm-2 s-1 (1.2 per cent of the Crab Nebula's flux) above 200 GeV. The measured spectrum is described well by a power law from 0.2 to 1.3 TeV with a photon index of 3.1 ± 0.4stat ± 0.2sys. Quasi-simultaneous multiwavelength data from the Fermi Large Area Telescope (0.3-300 GeV) and the Swift X-ray Telescope (0.2-10 keV) are additionally used to model the properties of the emission region. A synchrotron self-Compton model produces a good representation of the multiwavelength data. Adding an external-Compton or a hadronic component also adequately describes the data.

KW - BL Lacertae objects: general

KW - Gamma-rays: general

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