RED NOISE VERSUS PLANETARY INTERPRETATIONS IN THE MICROLENSING EVENT OGLE-2013-BLG-446

被引：10

作者：

Bachelet, E. ^{[1
]}

Bramich, D. M. ^{[1
]}

Han, C. ^{[2
]}

Greenhill, J. ^{[3
]}

Street, R. A. ^{[4
]}

Gould, A. ^{[5
]}

D'Ago, G. ^{[6
,7
]}

AlSubai, K. ^{[1
]}

Dominik, M. ^{[8
]}

Jaimes, R. Figuera ^{[8
,9
]}

Horne, K. ^{[8
]}

Hundertmark, M. ^{[8
]}

Kains, N. ^{[9
]}

Snodgrass, C. ^{[10
,11
]}

Steele, I. A. ^{[12
]}

Tsapras, Y. ^{[4
,13
]}

Albrow, M. D. ^{[14
]}

Batista, V. ^{[5
,15
]}

Beaulieu, J. -P. ^{[15
]}

Bennett, D. P. ^{[16
]}

Brillant, S. ^{[17
]}

Caldwell, J. A. R. ^{[18
]}

Cassan, A. ^{[15
]}

Cole, A. ^{[3
]}

Coutures, C. ^{[15
]}

Dieters, S. ^{[3
]}

Prester, D. Dominis ^{[19
]}

Donatowicz, J. ^{[20
]}

Fouque, P. ^{[21
,22
]}

Hill, K. ^{[3
]}

Marquette, J. -B. ^{[15
]}

Menzies, J. ^{[23
]}

Pere, C. ^{[15
]}

Ranc, C. ^{[15
]}

Wambsganss, J. ^{[24
]}

Warren, D. ^{[3
]}

De Almeida, L. Andrade ^{[25
]}

Choi, J. -Y. ^{[2
]}

DePoy, D. L. ^{[26
]}

Dong, S. ^{[5
,27
]}

Hung, L. -W. ^{[5
]}

Hwang, K. -H. ^{[2
]}

Jablonski, F. ^{[25
]}

Jung, Y. K. ^{[2
]}

Kaspi, S. ^{[28
]}

Klein, N. ^{[28
]}

Lee, C. -U. ^{[29
]}

Maoz, D. ^{[28
]}

Munoz, J. A. ^{[25
]}

Nataf, D. ^{[5
]}

机构：

[1] Qatar Fdn, Qatar Environm & Energy Res Inst, Doha, Qatar

[2] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea

[3] Univ Tasmania, Sch Math & Phys, Hobart, Tas 7001, Australia

[4] Las Cumbres Observ Global Telescope Network, Goleta, CA 93117 USA

[5] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA

[6] Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Fisciano Sa, Italy

[7] Ist Nazl Fis Nucl, Sezione Napoli, I-80125 Naples, Italy

[8] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland

[9] European Southern Observ, D-85748 Garching, Germany

[10] Max Planck Inst Solar Syst Res, D-37077 Gottingen, Germany

[11] Open Univ, Dept Phys Sci, Planetary & Space Sci, Milton Keynes MK7 6AA, Bucks, England

[12] Liverpool John Moores Univ, Astrophys Res Inst, Liverpool CH41 1LD, Merseyside, England

[13] Queen Mary Univ London, Sch Phys & Astron, London E1 4NS, England

[14] Univ Canterbury, Dept Phys & Astron, Christchurch 8020, New Zealand

[15] UPMC, CNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France

[16] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[17] European So Observ, Santiago, Chile

[18] McDonald Observ, Ft Davis, TX 79734 USA

[19] Univ Rijeka, Dept Phys, Rijeka 51000, Croatia

[20] Vienna Univ Technol, A-1040 Vienna, Austria

[21] Univ Toulouse, CNRS, IRAP, F-31400 Toulouse, France

[22] Canada France Hawaii Telescope Corp, Kamuela, HI 96743 USA

[23] S African Astron Observ, ZA-7935 Cape Town, South Africa

[24] Univ Heidelberg ZAH, Zentrum Astron, ARI, D-69120 Heidelberg, Germany

[25] Inst Nacl Pesquisas Espaciais, Div Astrofis, BR-12227010 Sao Jose Dos Campos, SP, Brazil

[26] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA

[27] Inst Adv Study, Princeton, NJ 08540 USA

[28] Tel Aviv Univ, Sch Phys & Astron & Wise Observ, IL-69978 Tel Aviv, Israel

[29] Korea Astron & Space Sci Inst, Daejeon 305348, South Korea

[30] Las Cumbres Observ Global Telescope Network, Goleta, CA 93117 USA

[31] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[32] Univ Auckland, Dept Phys, Auckland, New Zealand

[33] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[34] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan

[35] Natl Astron Observ Japan, Okayama Astrophys Observ, Asakuchi, Okayama 7190232, Japan

[36] Nagano Natl Coll Technol, Nagano 3818550, Japan

[37] Tokyo Metropolitan Coll Aeronaut, Tokyo 1168523, Japan

[38] Victoria Univ, Sch Chem & Phys Sci, Wellington, New Zealand

[39] Mt John Univ Observ, Lake Tekapo 8770, New Zealand

[40] Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kyoto 6038555, Japan

[41] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan

[42] Massey Univ, Inst Informat & Math Sci, Auckland, New Zealand

[43] CALTECH, NASA, Exoplanet Sci Inst, MS 100 22, Pasadena, CA 91125 USA

[44] IIASS, I-84019 Vietri Sul Mare Sa, Italy

[45] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[46] Chinese Acad Sci, Yunnan Observatories, Kunming 650011, Peoples R China

[47] Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, Kunming 650011, Peoples R China

[48] Univ Copenhagen, Niels Bohr Inst, DK-2100 Kobenhavn O, Denmark

[49] Univ Copenhagen, Nat Hist Museum, Ctr Star & Planet Format, DK-1350 Kobenhavn K, Denmark

[50] Korea Astron & Space Sci Inst, Daejeon 305348, South Korea

来源：

ASTROPHYSICAL JOURNAL | 2015年 / 812卷 / 02期

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

gravitational lensing: micro; planetary systems; techniques: photometric; GRAVITATIONAL LENSING EXPERIMENT; DIFFERENCE IMAGE-ANALYSIS; GALACTIC BULGE; EARTH-MASS; EXTRASOLAR PLANETS; LIGHT CURVES; FOLLOW-UP; OGLE-III; PARALLAX; PHOTOMETRY;

D O I：

10.1088/0004-637X/812/2/136

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

For all exoplanet candidates, the reliability of a claimed detection needs to be assessed through a careful study of systematic errors in the data to minimize the false positives rate. We present a method to investigate such systematics in microlensing data sets using the microlensing event OGLE-2013-BLG-0446 as a case study. The event was observed from multiple sites around the world and its high magnification (A(max) similar to 3000) allowed us to investigate the effects of terrestrial and annual parallax. Real-time modeling of the event while it was still ongoing suggested the presence of an extremely low-mass companion (similar to 3M(circle plus)) to the lensing star, leading to substantial follow-up coverage of the light curve. We test and compare different models for the light curve and conclude that the data do not favor the planetary interpretation when systematic errors are taken into account.

引用

页数：11

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