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

Physics and Astronomy (Twin Cities)

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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 500GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5day 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 500GeV. 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^-11ergcm^-2s^-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 (US)
Pages (from-to)	1034-1041
Number of pages	8
Journal	Astrophysical Journal
Volume	700
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/700/2/1034
State	Published - 2009

Keywords

Binaries: General
Gamma rays: Observations
X-rays: Binaries

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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. Astrophysical Journal, 700(2), 1034-1041. https://doi.org/10.1088/0004-637X/700/2/1034

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', Astrophysical Journal, vol. 700, no. 2, pp. 1034-1041. https://doi.org/10.1088/0004-637X/700/2/1034

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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 500GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5day 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 500GeV. 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 ×10-11ergcm-2s-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.",

keywords = "Binaries: General, Gamma rays: Observations, X-rays: Binaries",

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",

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

language = "English (US)",

volume = "700",

pages = "1034--1041",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

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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

Y1 - 2009

N2 - We present results from a long-term monitoring campaign on the TeV binary LSI +61°303 with VERITAS at energies above 500GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5day 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 500GeV. 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 ×10-11ergcm-2s-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 500GeV, and in the 2-10 keV hard X-ray bands with RXTE and Swift, sampling nine 26.5day 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 500GeV. 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 ×10-11ergcm-2s-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.

KW - Binaries: General

KW - Gamma rays: Observations

KW - X-rays: Binaries

UR - http://www.scopus.com/inward/record.url?scp=70449589074&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70449589074&partnerID=8YFLogxK

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

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

M3 - Article

AN - SCOPUS:70449589074

SN - 0004-637X

VL - 700

SP - 1034

EP - 1041

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Multiwavelength observations of LS i +61°303 with veritas, swift, and rxte

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