MULTIWAVELENGTH OBSERVATIONS OF LS I+61° 303 WITH VERITAS, SWIFT, AND RXTE

被引：27

作者：

Acciari, V. A. ^{[1
]}

Aliu, E. ^{[2
,3
]}

Arlen, T. ^{[4
]}

Bautista, M. ^{[5
]}

Beilicke, M. ^{[6
]}

Benbow, W. ^{[7
]}

Boettcher, M. ^{[8
]}

Bradbury, S. M. ^{[9
]}

Bugaev, V. ^{[6
]}

Butt, Y. ^{[10
]}

Byrum, K. ^{[11
]}

Cannon, A. ^{[12
]}

Cesarini, A. ^{[13
]}

Chow, Y. C. ^{[4
]}

Ciupik, L. ^{[14
]}

Cogan, P. ^{[5
]}

Colin, P. ^{[15
]}

Cui, W. ^{[16
]}

Daniel, M. ^{[9
]}

Dickherber, R. ^{[6
]}

Ergin, T. ^{[10
]}

Falcone, A. ^{[17
]}

Fegan, S. J. ^{[4
]}

Finley, J. P. ^{[16
]}

Fortin, P. ^{[18
]}

Fortson, L. ^{[14
]}

Furniss, A. ^{[19
,20
]}

Gall, D. ^{[16
]}

Gillanders, G. H. ^{[13
]}

Grube, J. ^{[12
]}

Guenette, R. ^{[5
]}

Gyuk, G. ^{[14
]}

Hanna, D. ^{[5
]}

Hays, E. ^{[21
]}

Holder, J. ^{[2
,3
]}

Horan, D. ^{[22
]}

Hui, C. M. ^{[15
]}

Humensky, T. B. ^{[23
]}

Kaaret, P. ^{[24
]}

Karlsson, N. ^{[14
]}

Kieda, D.

Kildea, J. ^{[7
,15
]}

Konopelko, A. ^{[25
]}

Krawczynski, H. ^{[6
]}

Krennrich, F. ^{[26
]}

Lang, M. J. ^{[13
]}

LeBohec, S. ^{[15
]}

Maier, G.

McCann, A. ^{[5
]}

机构：

[1] Galway Mayo Inst Technol, Dept Life & Phys Sci, Galway, Ireland

[2] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA

[3] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA

[4] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[5] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[6] Washington Univ, Dept Phys, St Louis, MO 63130 USA

[7] Harvard Smithsonian Ctr Astrophys, Fred Lawrence Whipple Observ, Amado, AZ 85645 USA

[8] Ohio Univ, Inst Astrophys, Dept Phys & Astron, Athens, OH 45701 USA

[9] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

[10] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[11] Argonne Natl Lab, Argonne, IL 60439 USA

[12] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland

[13] Natl Univ Ireland, Sch Phys, Galway, Ireland

[14] Adler Planetarium & Astron Museum, Dept Astron, Chicago, IL 60605 USA

[15] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

[16] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[17] Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA

[18] Columbia Univ Barnard Coll, Dept Phys & Astron, New York, NY 10027 USA

[19] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA

[20] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[21] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[22] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[23] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[24] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[25] Pittsburg State Univ, Dept Phys, Pittsburg, KS 66762 USA

[26] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[27] Anderson Univ, Dept Phys, Anderson, IN 46012 USA

[28] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[29] Cork Inst Technol, Dept Appl Phys & Instrumentat, Cork, Ireland

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 700卷 / 02期

基金：

美国国家科学基金会; 爱尔兰科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

binaries: general; gamma rays: observations; X-rays: binaries; GAMMA-RAY EMISSION; X-RAY; BINARY; RADIO; VARIABILITY; DISCOVERY; SPECTRUM; PULSAR;

D O I：

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

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results from a long-term monitoring campaign on the TeV binary LSI +61 degrees 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 8.8 sigma (2006/2007) and 7.3 sigma (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 3.6 sigma 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 x 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.

引用

页码：1034 / 1041

页数：8

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