Veritas observations of the γ-ray binary LS i +61 303

V. A. Acciari; M. Beilicke; G. Blaylock; S. M. Bradbury; J. H. Buckley; V. Bugaev; Y. Butt; K. L. Byrum; O. Celik; A. Cesarini; L. Ciupik; Y. C.K. Chow; P. Cogan; P. Colin; W. Cui; M. K. Daniel; C. Duke; T. Ergin; A. D. Falcone; S. J. Fegan; J. P. Finley; P. Fortin; L. F. Fortson; D. Gall; K. Gibbs; G. H. Gillanders; J. Grube; R. Guenette; D. Hanna; E. Hays; J. Holder; D. Horan; S. B. Hughes; C. M. Hui; T. B. Humensky; P. Kaaret; D. B. Kieda; J. Kildea; A. Konopelko; H. Krawczynski; F. Krennrich; M. J. Lang; S. Lebohec; K. Lee; G. Maier; A. Mccann; M. Mccutcheon; J. Millis; P. Moriarty; R. Mukherjee

doi:10.1086/587736

Veritas observations of the γ-ray binary LS i +61 303

V. A. Acciari, M. Beilicke, G. Blaylock, S. M. Bradbury, J. H. Buckley, V. Bugaev, Y. Butt, K. L. Byrum, O. Celik, A. Cesarini, L. Ciupik, Y. C.K. Chow, P. Cogan, P. Colin, W. Cui, M. K. Daniel, C. Duke, T. Ergin, A. D. Falcone, S. J. FeganJ. P. Finley, P. Fortin, L. F. Fortson, D. Gall, K. Gibbs, G. H. Gillanders, J. Grube, R. Guenette, D. Hanna, E. Hays, J. Holder, D. Horan, S. B. Hughes, C. M. Hui, T. B. Humensky, P. Kaaret, D. B. Kieda, J. Kildea, A. Konopelko, H. Krawczynski, F. Krennrich, M. J. Lang, S. Lebohec, K. Lee, G. Maier, A. Mccann, M. Mccutcheon, J. Millis, P. Moriarty, R. Mukherjee

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

192 Scopus citations

Abstract

LS I+61 303 is one of only a few high-mass X-ray binaries currently detected at high significance in very high energy γ-rays. The system was observed over several orbital cycles (between 2006 September and 2007 February) with the VERITAS array of imaging air Cerenkov telescopes. A signal of γ-rays with energies above 300 GeV is found with a statistical significance of 8.4 standard deviations. The detected flux is measured to be strongly variable; the maximum flux is found during most orbital cycles at apastron. The energy spectrum for the period of maximum emission can be characterized by a power law with a photon index of Γ = 2.40 ± 0.16_stat ± 0.2_sys and a flux above 300 GeV corresponding to 15%-20% of the flux from the Crab Nebula.

Original language	English (US)
Pages (from-to)	1427-1432
Number of pages	6
Journal	Astrophysical Journal
Volume	679
Issue number	2
DOIs	https://doi.org/10.1086/587736
State	Published - Jun 1 2008

Keywords

Acceleration of particles
Binaries: general
Gamma rays: observations

Access

10.1086/587736

OpenUrl availability

Full text

Cite this

Acciari, V. A., Beilicke, M., Blaylock, G., Bradbury, S. M., Buckley, J. H., Bugaev, V., Butt, Y., Byrum, K. L., Celik, O., Cesarini, A., Ciupik, L., Chow, Y. C. K., Cogan, P., Colin, P., Cui, W., Daniel, M. K., Duke, C., Ergin, T., Falcone, A. D., ... Mukherjee, R. (2008). Veritas observations of the γ-ray binary LS i +61 303. Astrophysical Journal, 679(2), 1427-1432. https://doi.org/10.1086/587736

Acciari, VA, Beilicke, M, Blaylock, G, Bradbury, SM, Buckley, JH, Bugaev, V, Butt, Y, Byrum, KL, Celik, O, Cesarini, A, Ciupik, L, Chow, YCK, Cogan, P, Colin, P, Cui, W, Daniel, MK, Duke, C, Ergin, T, Falcone, AD, Fegan, SJ, Finley, JP, Fortin, P, Fortson, LF, Gall, D, Gibbs, K, Gillanders, GH, Grube, J, Guenette, R, Hanna, D, Hays, E, Holder, J, Horan, D, Hughes, SB, Hui, CM, Humensky, TB, Kaaret, P, Kieda, DB, Kildea, J, Konopelko, A, Krawczynski, H, Krennrich, F, Lang, MJ, Lebohec, S, Lee, K, Maier, G, Mccann, A, Mccutcheon, M, Millis, J, Moriarty, P & Mukherjee, R 2008, 'Veritas observations of the γ-ray binary LS i +61 303', Astrophysical Journal, vol. 679, no. 2, pp. 1427-1432. https://doi.org/10.1086/587736

@article{e271b7dffe144974856830b1fafc5d3f,

title = "Veritas observations of the γ-ray binary LS i +61 303",

abstract = "LS I+61 303 is one of only a few high-mass X-ray binaries currently detected at high significance in very high energy γ-rays. The system was observed over several orbital cycles (between 2006 September and 2007 February) with the VERITAS array of imaging air Cerenkov telescopes. A signal of γ-rays with energies above 300 GeV is found with a statistical significance of 8.4 standard deviations. The detected flux is measured to be strongly variable; the maximum flux is found during most orbital cycles at apastron. The energy spectrum for the period of maximum emission can be characterized by a power law with a photon index of Γ = 2.40 ± 0.16stat ± 0.2sys and a flux above 300 GeV corresponding to 15%-20% of the flux from the Crab Nebula.",

keywords = "Acceleration of particles, Binaries: general, Gamma rays: observations",

author = "Acciari, {V. A.} and M. Beilicke and G. Blaylock and Bradbury, {S. M.} and Buckley, {J. H.} and V. Bugaev and Y. Butt and Byrum, {K. L.} and O. Celik and A. Cesarini and L. Ciupik and Chow, {Y. C.K.} and P. Cogan and P. Colin and W. Cui and Daniel, {M. K.} and C. Duke and T. Ergin and Falcone, {A. D.} and Fegan, {S. J.} and Finley, {J. P.} and P. Fortin and Fortson, {L. F.} and D. Gall and K. Gibbs and Gillanders, {G. H.} and J. Grube and R. Guenette and D. Hanna and E. Hays and J. Holder and D. Horan and Hughes, {S. B.} and Hui, {C. M.} and Humensky, {T. B.} and P. Kaaret and Kieda, {D. B.} and J. Kildea and A. Konopelko and H. Krawczynski and F. Krennrich and Lang, {M. J.} and S. Lebohec and K. Lee and G. Maier and A. Mccann and M. Mccutcheon and J. Millis and P. Moriarty and R. Mukherjee",

year = "2008",

month = jun,

day = "1",

doi = "10.1086/587736",

language = "English (US)",

volume = "679",

pages = "1427--1432",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "2",

}

TY - JOUR

T1 - Veritas observations of the γ-ray binary LS i +61 303

AU - Acciari, V. A.

AU - Beilicke, M.

AU - Blaylock, G.

AU - Bradbury, S. M.

AU - Buckley, J. H.

AU - Bugaev, V.

AU - Butt, Y.

AU - Byrum, K. L.

AU - Celik, O.

AU - Cesarini, A.

AU - Ciupik, L.

AU - Chow, Y. C.K.

AU - Cogan, P.

AU - Colin, P.

AU - Cui, W.

AU - Daniel, M. K.

AU - Duke, C.

AU - Ergin, T.

AU - Falcone, A. D.

AU - Fegan, S. J.

AU - Finley, J. P.

AU - Fortin, P.

AU - Fortson, L. F.

AU - Gall, D.

AU - Gibbs, K.

AU - Gillanders, G. H.

AU - Grube, J.

AU - Guenette, R.

AU - Hanna, D.

AU - Hays, E.

AU - Holder, J.

AU - Horan, D.

AU - Hughes, S. B.

AU - Hui, C. M.

AU - Humensky, T. B.

AU - Kaaret, P.

AU - Kieda, D. B.

AU - Kildea, J.

AU - Konopelko, A.

AU - Krawczynski, H.

AU - Krennrich, F.

AU - Lang, M. J.

AU - Lebohec, S.

AU - Lee, K.

AU - Maier, G.

AU - Mccann, A.

AU - Mccutcheon, M.

AU - Millis, J.

AU - Moriarty, P.

AU - Mukherjee, R.

PY - 2008/6/1

Y1 - 2008/6/1

N2 - LS I+61 303 is one of only a few high-mass X-ray binaries currently detected at high significance in very high energy γ-rays. The system was observed over several orbital cycles (between 2006 September and 2007 February) with the VERITAS array of imaging air Cerenkov telescopes. A signal of γ-rays with energies above 300 GeV is found with a statistical significance of 8.4 standard deviations. The detected flux is measured to be strongly variable; the maximum flux is found during most orbital cycles at apastron. The energy spectrum for the period of maximum emission can be characterized by a power law with a photon index of Γ = 2.40 ± 0.16stat ± 0.2sys and a flux above 300 GeV corresponding to 15%-20% of the flux from the Crab Nebula.

AB - LS I+61 303 is one of only a few high-mass X-ray binaries currently detected at high significance in very high energy γ-rays. The system was observed over several orbital cycles (between 2006 September and 2007 February) with the VERITAS array of imaging air Cerenkov telescopes. A signal of γ-rays with energies above 300 GeV is found with a statistical significance of 8.4 standard deviations. The detected flux is measured to be strongly variable; the maximum flux is found during most orbital cycles at apastron. The energy spectrum for the period of maximum emission can be characterized by a power law with a photon index of Γ = 2.40 ± 0.16stat ± 0.2sys and a flux above 300 GeV corresponding to 15%-20% of the flux from the Crab Nebula.

KW - Acceleration of particles

KW - Binaries: general

KW - Gamma rays: observations

UR - http://www.scopus.com/inward/record.url?scp=46349101965&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=46349101965&partnerID=8YFLogxK

U2 - 10.1086/587736

DO - 10.1086/587736

M3 - Article

AN - SCOPUS:46349101965

SN - 0004-637X

VL - 679

SP - 1427

EP - 1432

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Veritas observations of the γ-ray binary LS i +61 303

Abstract

Keywords

Access

OpenUrl availability

Other files and links

Fingerprint

Cite this