Multiwavelength observations of markarian 421 in 2005-2006

D. Horan, V. A. Acciari, S. M. Bradbury, J. H. Buckley, V. Bugaev, K. L. Byrum, A. Cannon, O. Celik, A. Cesarini, Y. C.K. Chow, L. Ciupik, P. Cogan, A. D. Falcone, S. J. Fegan, J. P. Finley, P. Fortin, L. F. Fortson, D. Gall, G. H. Gillanders, J. GrubeG. Gyuk, D. Hanna, E. Hays, M. Kertzman, J. Kildea, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, K. Lee, P. Moriarty, T. Nagai, J. Niemiec, R. A. Ong, J. S. Perkins, M. Pohl, J. Quinn, P. T. Reynolds, H. J. Rose, G. H. Sembroski, A. W. Smith, D. Steele, S. P. Swordy, J. A. Toner, V. V. Vassiliev, S. P. Wakely, T. C. Weekes, R. J. White, D. A. Williams, M. D. Wood, B. Zitzer, H. D. Aller, M. F. Aller, M. Baker, D. Barnaby, M. T. Carini, P. Charlot, J. P. Dumm, N. E. Fields, T. Hovatta, B. Jordan, Y. A. Kovalev, Y. Y. Kovalev, H. A. Krimm, O. M. Kurtanidze, A. L. Ahteenmaki, J. F.Le Campion, J. Maune, T. Montaruli, A. C. Sadun, S. Smith, M. Tornikoski, M. Turunen, R. Walters

Research output: Contribution to journalArticle

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Abstract

Since 2005 September, the Whipple 10 m Gamma-ray Telescope has been operated primarily as a blazar monitor. The five northern hemisphere blazars that have already been detected at the Whipple Observatory, Markarian 421 (Mrk 421), H1426+428, Mrk 501, 1ES 1959+650, and 1ES 2344+514, are monitored routinely each night that they are visible. We report on the Mrk 421 observations taken from 2005 November to 2006 June in the gamma-ray, X-ray, optical, and radio bands. During this time, Mrk 421 was found to be variable at all wavelengths probed. Both the variability and the correlations among different energy regimes are studied in detail here. A tentative correlation, with large spread, was measured between the X-ray and gamma-ray bands, while no clear correlation was evident among the other energy bands. In addition to this, the well-sampled spectral energy distribution of Mrk 421 (1101+384) is presented for three different activity levels. The observations of the other blazar targets will be reported separately.

Original languageEnglish (US)
Pages (from-to)596-618
Number of pages23
JournalAstrophysical Journal
Volume695
Issue number1
DOIs
StatePublished - Apr 10 2009

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gamma rays
gamma ray telescopes
energy
blazars
Northern Hemisphere
spectral energy distribution
night
energy bands
monitors
observatories
x rays
observatory
radio
wavelength
wavelengths
distribution

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Horan, D., Acciari, V. A., Bradbury, S. M., Buckley, J. H., Bugaev, V., Byrum, K. L., ... Walters, R. (2009). Multiwavelength observations of markarian 421 in 2005-2006. Astrophysical Journal, 695(1), 596-618. https://doi.org/10.1088/0004-637X/695/1/596
Horan, D. ; Acciari, V. A. ; Bradbury, S. M. ; Buckley, J. H. ; Bugaev, V. ; Byrum, K. L. ; Cannon, A. ; Celik, O. ; Cesarini, A. ; Chow, Y. C.K. ; Ciupik, L. ; Cogan, P. ; Falcone, A. D. ; Fegan, S. J. ; Finley, J. P. ; Fortin, P. ; Fortson, L. F. ; Gall, D. ; Gillanders, G. H. ; Grube, J. ; Gyuk, G. ; Hanna, D. ; Hays, E. ; Kertzman, M. ; Kildea, J. ; Konopelko, A. ; Krawczynski, H. ; Krennrich, F. ; Lang, M. J. ; Lee, K. ; Moriarty, P. ; Nagai, T. ; Niemiec, J. ; Ong, R. A. ; Perkins, J. S. ; Pohl, M. ; Quinn, J. ; Reynolds, P. T. ; Rose, H. J. ; Sembroski, G. H. ; Smith, A. W. ; Steele, D. ; Swordy, S. P. ; Toner, J. A. ; Vassiliev, V. V. ; Wakely, S. P. ; Weekes, T. C. ; White, R. J. ; Williams, D. A. ; Wood, M. D. ; Zitzer, B. ; Aller, H. D. ; Aller, M. F. ; Baker, M. ; Barnaby, D. ; Carini, M. T. ; Charlot, P. ; Dumm, J. P. ; Fields, N. E. ; Hovatta, T. ; Jordan, B. ; Kovalev, Y. A. ; Kovalev, Y. Y. ; Krimm, H. A. ; Kurtanidze, O. M. ; Ahteenmaki, A. L. ; Campion, J. F.Le ; Maune, J. ; Montaruli, T. ; Sadun, A. C. ; Smith, S. ; Tornikoski, M. ; Turunen, M. ; Walters, R. / Multiwavelength observations of markarian 421 in 2005-2006. In: Astrophysical Journal. 2009 ; Vol. 695, No. 1. pp. 596-618.
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abstract = "Since 2005 September, the Whipple 10 m Gamma-ray Telescope has been operated primarily as a blazar monitor. The five northern hemisphere blazars that have already been detected at the Whipple Observatory, Markarian 421 (Mrk 421), H1426+428, Mrk 501, 1ES 1959+650, and 1ES 2344+514, are monitored routinely each night that they are visible. We report on the Mrk 421 observations taken from 2005 November to 2006 June in the gamma-ray, X-ray, optical, and radio bands. During this time, Mrk 421 was found to be variable at all wavelengths probed. Both the variability and the correlations among different energy regimes are studied in detail here. A tentative correlation, with large spread, was measured between the X-ray and gamma-ray bands, while no clear correlation was evident among the other energy bands. In addition to this, the well-sampled spectral energy distribution of Mrk 421 (1101+384) is presented for three different activity levels. The observations of the other blazar targets will be reported separately.",
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Horan, D, Acciari, VA, Bradbury, SM, Buckley, JH, Bugaev, V, Byrum, KL, Cannon, A, Celik, O, Cesarini, A, Chow, YCK, Ciupik, L, Cogan, P, Falcone, AD, Fegan, SJ, Finley, JP, Fortin, P, Fortson, LF, Gall, D, Gillanders, GH, Grube, J, Gyuk, G, Hanna, D, Hays, E, Kertzman, M, Kildea, J, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, MJ, Lee, K, Moriarty, P, Nagai, T, Niemiec, J, Ong, RA, Perkins, JS, Pohl, M, Quinn, J, Reynolds, PT, Rose, HJ, Sembroski, GH, Smith, AW, Steele, D, Swordy, SP, Toner, JA, Vassiliev, VV, Wakely, SP, Weekes, TC, White, RJ, Williams, DA, Wood, MD, Zitzer, B, Aller, HD, Aller, MF, Baker, M, Barnaby, D, Carini, MT, Charlot, P, Dumm, JP, Fields, NE, Hovatta, T, Jordan, B, Kovalev, YA, Kovalev, YY, Krimm, HA, Kurtanidze, OM, Ahteenmaki, AL, Campion, JFL, Maune, J, Montaruli, T, Sadun, AC, Smith, S, Tornikoski, M, Turunen, M & Walters, R 2009, 'Multiwavelength observations of markarian 421 in 2005-2006', Astrophysical Journal, vol. 695, no. 1, pp. 596-618. https://doi.org/10.1088/0004-637X/695/1/596

Multiwavelength observations of markarian 421 in 2005-2006. / Horan, D.; Acciari, V. A.; Bradbury, S. M.; Buckley, J. H.; Bugaev, V.; Byrum, K. L.; Cannon, A.; Celik, O.; Cesarini, A.; Chow, Y. C.K.; Ciupik, L.; Cogan, P.; Falcone, A. D.; Fegan, S. J.; Finley, J. P.; Fortin, P.; Fortson, L. F.; Gall, D.; Gillanders, G. H.; Grube, J.; Gyuk, G.; Hanna, D.; Hays, E.; Kertzman, M.; Kildea, J.; Konopelko, A.; Krawczynski, H.; Krennrich, F.; Lang, M. J.; Lee, K.; Moriarty, P.; Nagai, T.; Niemiec, J.; Ong, R. A.; Perkins, J. S.; Pohl, M.; Quinn, J.; Reynolds, P. T.; Rose, H. J.; Sembroski, G. H.; Smith, A. W.; Steele, D.; Swordy, S. P.; Toner, J. A.; Vassiliev, V. V.; Wakely, S. P.; Weekes, T. C.; White, R. J.; Williams, D. A.; Wood, M. D.; Zitzer, B.; Aller, H. D.; Aller, M. F.; Baker, M.; Barnaby, D.; Carini, M. T.; Charlot, P.; Dumm, J. P.; Fields, N. E.; Hovatta, T.; Jordan, B.; Kovalev, Y. A.; Kovalev, Y. Y.; Krimm, H. A.; Kurtanidze, O. M.; Ahteenmaki, A. L.; Campion, J. F.Le; Maune, J.; Montaruli, T.; Sadun, A. C.; Smith, S.; Tornikoski, M.; Turunen, M.; Walters, R.

In: Astrophysical Journal, Vol. 695, No. 1, 10.04.2009, p. 596-618.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Multiwavelength observations of markarian 421 in 2005-2006

AU - Horan, D.

AU - Acciari, V. A.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Byrum, K. L.

AU - Cannon, A.

AU - Celik, O.

AU - Cesarini, A.

AU - Chow, Y. C.K.

AU - Ciupik, L.

AU - Cogan, P.

AU - Falcone, A. D.

AU - Fegan, S. J.

AU - Finley, J. P.

AU - Fortin, P.

AU - Fortson, L. F.

AU - Gall, D.

AU - Gillanders, G. H.

AU - Grube, J.

AU - Gyuk, G.

AU - Hanna, D.

AU - Hays, E.

AU - Kertzman, M.

AU - Kildea, J.

AU - Konopelko, A.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - Lee, K.

AU - Moriarty, P.

AU - Nagai, T.

AU - Niemiec, J.

AU - Ong, R. A.

AU - Perkins, J. S.

AU - Pohl, M.

AU - Quinn, J.

AU - Reynolds, P. T.

AU - Rose, H. J.

AU - Sembroski, G. H.

AU - Smith, A. W.

AU - Steele, D.

AU - Swordy, S. P.

AU - Toner, J. A.

AU - Vassiliev, V. V.

AU - Wakely, S. P.

AU - Weekes, T. C.

AU - White, R. J.

AU - Williams, D. A.

AU - Wood, M. D.

AU - Zitzer, B.

AU - Aller, H. D.

AU - Aller, M. F.

AU - Baker, M.

AU - Barnaby, D.

AU - Carini, M. T.

AU - Charlot, P.

AU - Dumm, J. P.

AU - Fields, N. E.

AU - Hovatta, T.

AU - Jordan, B.

AU - Kovalev, Y. A.

AU - Kovalev, Y. Y.

AU - Krimm, H. A.

AU - Kurtanidze, O. M.

AU - Ahteenmaki, A. L.

AU - Campion, J. F.Le

AU - Maune, J.

AU - Montaruli, T.

AU - Sadun, A. C.

AU - Smith, S.

AU - Tornikoski, M.

AU - Turunen, M.

AU - Walters, R.

PY - 2009/4/10

Y1 - 2009/4/10

N2 - Since 2005 September, the Whipple 10 m Gamma-ray Telescope has been operated primarily as a blazar monitor. The five northern hemisphere blazars that have already been detected at the Whipple Observatory, Markarian 421 (Mrk 421), H1426+428, Mrk 501, 1ES 1959+650, and 1ES 2344+514, are monitored routinely each night that they are visible. We report on the Mrk 421 observations taken from 2005 November to 2006 June in the gamma-ray, X-ray, optical, and radio bands. During this time, Mrk 421 was found to be variable at all wavelengths probed. Both the variability and the correlations among different energy regimes are studied in detail here. A tentative correlation, with large spread, was measured between the X-ray and gamma-ray bands, while no clear correlation was evident among the other energy bands. In addition to this, the well-sampled spectral energy distribution of Mrk 421 (1101+384) is presented for three different activity levels. The observations of the other blazar targets will be reported separately.

AB - Since 2005 September, the Whipple 10 m Gamma-ray Telescope has been operated primarily as a blazar monitor. The five northern hemisphere blazars that have already been detected at the Whipple Observatory, Markarian 421 (Mrk 421), H1426+428, Mrk 501, 1ES 1959+650, and 1ES 2344+514, are monitored routinely each night that they are visible. We report on the Mrk 421 observations taken from 2005 November to 2006 June in the gamma-ray, X-ray, optical, and radio bands. During this time, Mrk 421 was found to be variable at all wavelengths probed. Both the variability and the correlations among different energy regimes are studied in detail here. A tentative correlation, with large spread, was measured between the X-ray and gamma-ray bands, while no clear correlation was evident among the other energy bands. In addition to this, the well-sampled spectral energy distribution of Mrk 421 (1101+384) is presented for three different activity levels. The observations of the other blazar targets will be reported separately.

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DO - 10.1088/0004-637X/695/1/596

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JO - Astrophysical Journal

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Horan D, Acciari VA, Bradbury SM, Buckley JH, Bugaev V, Byrum KL et al. Multiwavelength observations of markarian 421 in 2005-2006. Astrophysical Journal. 2009 Apr 10;695(1):596-618. https://doi.org/10.1088/0004-637X/695/1/596