Multiwavelength Observations of LS I +61° 303 with Veritas, Swift, and RXTE

V. A. Acciari; E. Aliu; T. Arlen; M. Bautista; M. Beilicke; W. Benbow; M. Böttcher; S. M. Bradbury; V. Bugaev; Y. Butt; Y. Butt; K. Byrum; A. Cannon; A. Cesarini; Y. C. Chow; L. Ciupik; P. Cogan; P. Colin; W. Cui; M. Daniel; R. Dickherber; T. Ergin; A. Falcone; S. J. Fegan; J. P. Finley; P. Fortin; L. Fortson; A. Furniss; D. Gall; G. H. Gillanders; J. Grube; R. Guenette; G. Gyuk; D. Hanna; E. Hays; J. Holder; D. Horan; C. M. Hui; T. B. Humensky; P. Kaaret; N. Karlsson; D. Kieda; J. Kildea; A. Konopelko; H. Krawczynski; F. Krennrich; M. J. Lang; S. LeBohec; G. Maier; A. McCann; M. McCutcheon; J. Millis; P. Moriarty; R. Mukherjee; T. Nagai; R. A. Ong; A. N. Otte; D. Pandel; J. S. Perkins; J. S. Perkins; M. Pohl; J. Quinn; K. Ragan; L. C. Reyes; P. T. Reynolds; E. Roache; H. Joachim Rose; M. Schroedter; G. H. Sembroski; A. W. Smith; D. Steele; M. Stroh; S. Swordy; M. Theiling; J. A. Toner; A. Varlotta; V. V. Vassiliev; R. G. Wagner; S. P. Wakely; J. E. Ward; T. C. Weekes; A. Weinstein; R. J. White; D. A. Williams; S. Wissel; M. Wood; B. Zitzer

doi:10.1088/0004-637X/700/2/1034

Multiwavelength Observations of LS I +61° 303 with Veritas, Swift, and RXTE

V. A. Acciari, E. Aliu, T. Arlen, M. Bautista, M. Beilicke, W. Benbow, M. Böttcher, S. M. Bradbury, V. Bugaev, Y. Butt, Y. Butt, K. Byrum, A. Cannon, A. Cesarini, Y. C. Chow, L. Ciupik, P. Cogan, P. Colin, W. Cui, M. DanielR. Dickherber, T. Ergin, A. Falcone, S. J. Fegan, J. P. Finley, P. Fortin, L. Fortson, A. Furniss, D. Gall, G. H. Gillanders, J. Grube, R. Guenette, G. Gyuk, D. Hanna, E. Hays, J. Holder, D. Horan, C. M. Hui, T. B. Humensky, P. Kaaret, N. Karlsson, D. Kieda, J. Kildea, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, S. LeBohec, G. Maier, A. McCann, M. McCutcheon, J. Millis, P. Moriarty, R. Mukherjee, T. Nagai, R. A. Ong, A. N. Otte, D. Pandel, J. S. Perkins, J. S. Perkins, M. Pohl, J. Quinn, K. Ragan, L. C. Reyes, P. T. Reynolds, E. Roache, H. Joachim Rose, M. Schroedter, G. H. Sembroski, A. W. Smith, D. Steele, M. Stroh, S. Swordy, M. Theiling, J. A. Toner, A. Varlotta, V. V. Vassiliev, R. G. Wagner, S. P. Wakely, J. E. Ward, T. C. Weekes, A. Weinstein, R. J. White, D. A. Williams, S. Wissel, M. Wood, B. Zitzer

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Abstract

We present results from a long-term monitoring campaign on the TeV binary LSI +61° 303 with VERITAS at energies above 500 GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5 day orbital cycles between 2006 September and 2008 February. The binary was observed by VERITAS to be variable, with all integrated observations resulting in a detection at the 8.8σ (2006/2007) and 7.3σ (2007/2008) significance level for emission above 500 GeV. The source was detected during active periods with flux values ranging from 5% to 20% of the Crab Nebula, varying over the course of a single orbital cycle. Additionally, the observations conducted in the 2007-2008 observing season show marginal evidence (at the 3.6σ significance level) for TeV emission outside the apastron passage of the compact object around the Be star. Contemporaneous hard X-ray observations with RXTE and Swift show large variability with flux values typically varying between 0.5 and 3.0 ×10^-11 erg cm^-2 s^-1 over a single orbital cycle. The contemporaneous X-ray and TeV data are examined and it is shown that the TeV sampling is not dense enough to detect a correlation between the two bands....

Original language	English
Journal	The Astrophysical Journal
DOIs	https://doi.org/10.1088/0004-637X/700/2/1034
Publication status	Published - Aug 2009

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10.1088/0004-637X/700/2/1034

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Acciari, V. A., Aliu, E., Arlen, T., Bautista, M., Beilicke, M., Benbow, W., Böttcher, M., Bradbury, S. M., Bugaev, V., Butt, Y., Butt, Y., Byrum, K., Cannon, A., Cesarini, A., Chow, Y. C., Ciupik, L., Cogan, P., Colin, P., Cui, W., ... Zitzer, B. (2009). Multiwavelength Observations of LS I +61° 303 with Veritas, Swift, and RXTE. The Astrophysical Journal. https://doi.org/10.1088/0004-637X/700/2/1034

@article{0e41fbf827284e81a756deaab79e630b,

title = "Multiwavelength Observations of LS I +61° 303 with Veritas, Swift, and RXTE",

abstract = "We present results from a long-term monitoring campaign on the TeV binary LSI +61° 303 with VERITAS at energies above 500 GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5 day orbital cycles between 2006 September and 2008 February. The binary was observed by VERITAS to be variable, with all integrated observations resulting in a detection at the 8.8σ (2006/2007) and 7.3σ (2007/2008) significance level for emission above 500 GeV. The source was detected during active periods with flux values ranging from 5\% to 20\% of the Crab Nebula, varying over the course of a single orbital cycle. Additionally, the observations conducted in the 2007-2008 observing season show marginal evidence (at the 3.6σ significance level) for TeV emission outside the apastron passage of the compact object around the Be star. Contemporaneous hard X-ray observations with RXTE and Swift show large variability with flux values typically varying between 0.5 and 3.0 ×10-11 erg cm-2 s-1 over a single orbital cycle. The contemporaneous X-ray and TeV data are examined and it is shown that the TeV sampling is not dense enough to detect a correlation between the two bands....",

author = "Acciari, \{V. A.\} and E. Aliu and T. Arlen and M. Bautista and M. Beilicke and W. Benbow and M. B{\"o}ttcher and Bradbury, \{S. M.\} and V. Bugaev and Y. Butt and Y. Butt and K. Byrum and A. Cannon and A. Cesarini and Chow, \{Y. C.\} and L. Ciupik and P. Cogan and P. Colin and W. Cui and M. Daniel and R. Dickherber and T. Ergin and A. Falcone and Fegan, \{S. J.\} and Finley, \{J. P.\} and P. Fortin and L. Fortson and A. Furniss and D. Gall and Gillanders, \{G. H.\} and J. Grube and R. Guenette and G. Gyuk and D. Hanna and E. Hays and J. Holder and D. Horan and Hui, \{C. M.\} and Humensky, \{T. B.\} and P. Kaaret and N. Karlsson and D. Kieda and J. Kildea and A. Konopelko and H. Krawczynski and F. Krennrich and Lang, \{M. J.\} and S. LeBohec and G. Maier and A. McCann and M. McCutcheon and J. Millis and P. Moriarty and R. Mukherjee and T. Nagai and Ong, \{R. A.\} and Otte, \{A. N.\} and D. Pandel and Perkins, \{J. S.\} and Perkins, \{J. S.\} and M. Pohl and J. Quinn and K. Ragan and Reyes, \{L. C.\} and Reynolds, \{P. T.\} and E. Roache and \{Joachim Rose\}, H. and M. Schroedter and Sembroski, \{G. H.\} and Smith, \{A. W.\} and D. Steele and M. Stroh and S. Swordy and M. Theiling and Toner, \{J. A.\} and A. Varlotta and Vassiliev, \{V. V.\} and Wagner, \{R. G.\} and Wakely, \{S. P.\} and Ward, \{J. E.\} and Weekes, \{T. C.\} and A. Weinstein and White, \{R. J.\} and Williams, \{D. A.\} and S. Wissel and M. Wood and B. Zitzer",

year = "2009",

month = aug,

doi = "10.1088/0004-637X/700/2/1034",

language = "English",

journal = "The Astrophysical Journal",

}

Acciari, VA, Aliu, E, Arlen, T, Bautista, M, Beilicke, M, Benbow, W, Böttcher, M, Bradbury, SM, Bugaev, V, Butt, Y, Butt, Y, Byrum, K, Cannon, A, Cesarini, A, Chow, YC, Ciupik, L, Cogan, P, Colin, P, Cui, W, Daniel, M, Dickherber, R, Ergin, T, Falcone, A, Fegan, SJ, Finley, JP, Fortin, P, Fortson, L, Furniss, A, Gall, D, Gillanders, GH, Grube, J, Guenette, R, Gyuk, G, Hanna, D, Hays, E, Holder, J, Horan, D, Hui, CM, Humensky, TB, Kaaret, P, Karlsson, N, Kieda, D, Kildea, J, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, MJ, LeBohec, S, Maier, G, McCann, A, McCutcheon, M, Millis, J, Moriarty, P, Mukherjee, R, Nagai, T, Ong, RA, Otte, AN, Pandel, D, Perkins, JS, Perkins, JS, Pohl, M, Quinn, J, Ragan, K, Reyes, LC, Reynolds, PT, Roache, E, Joachim Rose, H, Schroedter, M, Sembroski, GH, Smith, AW, Steele, D, Stroh, M, Swordy, S, Theiling, M, Toner, JA, Varlotta, A, Vassiliev, VV, Wagner, RG, Wakely, SP, Ward, JE, Weekes, TC, Weinstein, A, White, RJ, Williams, DA, Wissel, S, Wood, M & Zitzer, B 2009, 'Multiwavelength Observations of LS I +61° 303 with Veritas, Swift, and RXTE', The Astrophysical Journal. https://doi.org/10.1088/0004-637X/700/2/1034

TY - JOUR

T1 - Multiwavelength Observations of LS I +61° 303 with Veritas, Swift, and RXTE

AU - Acciari, V. A.

AU - Aliu, E.

AU - Arlen, T.

AU - Bautista, M.

AU - Beilicke, M.

AU - Benbow, W.

AU - Böttcher, M.

AU - Bradbury, S. M.

AU - Bugaev, V.

AU - Butt, Y.

AU - Byrum, K.

AU - Cannon, A.

AU - Cesarini, A.

AU - Chow, Y. C.

AU - Ciupik, L.

AU - Cogan, P.

AU - Colin, P.

AU - Cui, W.

AU - Daniel, M.

AU - Dickherber, R.

AU - Ergin, T.

AU - Falcone, A.

AU - Fegan, S. J.

AU - Finley, J. P.

AU - Fortin, P.

AU - Fortson, L.

AU - Furniss, A.

AU - Gall, D.

AU - Gillanders, G. H.

AU - Grube, J.

AU - Guenette, R.

AU - Gyuk, G.

AU - Hanna, D.

AU - Hays, E.

AU - Holder, J.

AU - Horan, D.

AU - Hui, C. M.

AU - Humensky, T. B.

AU - Kaaret, P.

AU - Karlsson, N.

AU - Kieda, D.

AU - Kildea, J.

AU - Konopelko, A.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - LeBohec, S.

AU - Maier, G.

AU - McCann, A.

AU - McCutcheon, M.

AU - Millis, J.

AU - Moriarty, P.

AU - Mukherjee, R.

AU - Nagai, T.

AU - Ong, R. A.

AU - Otte, A. N.

AU - Pandel, D.

AU - Perkins, J. S.

AU - Pohl, M.

AU - Quinn, J.

AU - Ragan, K.

AU - Reyes, L. C.

AU - Reynolds, P. T.

AU - Roache, E.

AU - Joachim Rose, H.

AU - Schroedter, M.

AU - Sembroski, G. H.

AU - Smith, A. W.

AU - Steele, D.

AU - Stroh, M.

AU - Swordy, S.

AU - Theiling, M.

AU - Toner, J. A.

AU - Varlotta, A.

AU - Vassiliev, V. V.

AU - Wagner, R. G.

AU - Wakely, S. P.

AU - Ward, J. E.

AU - Weekes, T. C.

AU - Weinstein, A.

AU - White, R. J.

AU - Williams, D. A.

AU - Wissel, S.

AU - Wood, M.

AU - Zitzer, B.

PY - 2009/8

Y1 - 2009/8

N2 - We present results from a long-term monitoring campaign on the TeV binary LSI +61° 303 with VERITAS at energies above 500 GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5 day orbital cycles between 2006 September and 2008 February. The binary was observed by VERITAS to be variable, with all integrated observations resulting in a detection at the 8.8σ (2006/2007) and 7.3σ (2007/2008) significance level for emission above 500 GeV. The source was detected during active periods with flux values ranging from 5% to 20% of the Crab Nebula, varying over the course of a single orbital cycle. Additionally, the observations conducted in the 2007-2008 observing season show marginal evidence (at the 3.6σ significance level) for TeV emission outside the apastron passage of the compact object around the Be star. Contemporaneous hard X-ray observations with RXTE and Swift show large variability with flux values typically varying between 0.5 and 3.0 ×10-11 erg cm-2 s-1 over a single orbital cycle. The contemporaneous X-ray and TeV data are examined and it is shown that the TeV sampling is not dense enough to detect a correlation between the two bands....

AB - We present results from a long-term monitoring campaign on the TeV binary LSI +61° 303 with VERITAS at energies above 500 GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5 day orbital cycles between 2006 September and 2008 February. The binary was observed by VERITAS to be variable, with all integrated observations resulting in a detection at the 8.8σ (2006/2007) and 7.3σ (2007/2008) significance level for emission above 500 GeV. The source was detected during active periods with flux values ranging from 5% to 20% of the Crab Nebula, varying over the course of a single orbital cycle. Additionally, the observations conducted in the 2007-2008 observing season show marginal evidence (at the 3.6σ significance level) for TeV emission outside the apastron passage of the compact object around the Be star. Contemporaneous hard X-ray observations with RXTE and Swift show large variability with flux values typically varying between 0.5 and 3.0 ×10-11 erg cm-2 s-1 over a single orbital cycle. The contemporaneous X-ray and TeV data are examined and it is shown that the TeV sampling is not dense enough to detect a correlation between the two bands....

U2 - 10.1088/0004-637X/700/2/1034

DO - 10.1088/0004-637X/700/2/1034

M3 - Article

JO - The Astrophysical Journal

JF - The Astrophysical Journal

ER -

Multiwavelength Observations of LS I +61° 303 with Veritas, Swift, and RXTE

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