Red noise versus planetary interpretations in the microlensing event Ogle-2013-BLG-446

E. Bachelet; D. M. Bramich; C. Han; J. Greenhill; R. A. Street; A. Gould; G. D’Ago; K. AlSubai; Martin Dominik; Roberto Jose Figuera Jaimes; Keith Douglas Horne; Markus Peter Gerhard Hundertmark; N. Kains; C. Snodgrass; I. A. Steele; Y. Tsapras; M. D. Albrow; V. Batista; J.-P. Beaulieu; D. P. Bennett; S. Brillant; J. A. R. Caldwell; A. Cassan; A. Cole; C. Coutures; S. Dieters; D. Dominis Prester; J. Donatowicz; P. Fouqué; K. Hill; J.-B. Marquette; J. Menzies; C. Pere; C. Ranc; J. Wambsganss; D. Warren; L. Andrade de Almeida; J.-Y. Choi; D. L. DePoy; S. Dong; L.-W. Hung; K.-H. Hwang; F. Jablonski; Y. K. Jung; S. Kaspi; N. Klein; C.-U. Lee; D. Maoz; J. A. Muñoz; D. Nataf; H. Park; R. W. Pogge; D. Polishook; I.-G. Shin; A. Shporer; J. C. Yee; F. Abe; A. Bhattacharya; I. A. Bond; C. S. Botzler; M. Freeman; A. Fukui; Y. Itow; N. Koshimoto; C. H. Ling; K. Masuda; Y. Matsubara; Y. Muraki; K. Ohnishi; L. C. Philpott; N. Rattenbury; To. Saito; D. J. Sullivan; T. Sumi; D. Suzuki; P. J. Tristram; A. Yonehara; V. Bozza; S. Calchi Novati; S. Ciceri; Pasquale Grant; S.-H. Gu; K. Harpsøe; T. C. Hinse; U. G. Jørgensen; D. Juncher; H. Korhonen; L. Mancini; C. Melchiorre; A. Popovas; A. Postiglione; M. Rabus; S. Rahvar; R. W. Schmidt; G. Scarpetta; J. Skottfelt; John Southworth; An. Stabile; J. Surdej; X.-B. Wang; O. Wertz

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

Red noise versus planetary interpretations in the microlensing event Ogle-2013-BLG-446

E. Bachelet
, D. M. Bramich
, C. Han
, J. Greenhill
, R. A. Street
, A. Gould
, G. D’Ago
, K. AlSubai
, Martin Dominik
, Roberto Jose Figuera Jaimes
, Keith Douglas Horne
, Markus Peter Gerhard Hundertmark
, N. Kains
, C. Snodgrass
, I. A. Steele
, Y. Tsapras
, M. D. Albrow
, V. Batista
, J.-P. Beaulieu
, D. P. Bennett

S. Brillant, J. A. R. Caldwell, A. Cassan, A. Cole, C. Coutures, S. Dieters, D. Dominis Prester, J. Donatowicz, P. Fouqué, K. Hill, J.-B. Marquette, J. Menzies, C. Pere, C. Ranc, J. Wambsganss, D. Warren, L. Andrade de Almeida, J.-Y. Choi, D. L. DePoy, S. Dong, L.-W. Hung, K.-H. Hwang, F. Jablonski, Y. K. Jung, S. Kaspi, N. Klein, C.-U. Lee, D. Maoz, J. A. Muñoz, D. Nataf, H. Park, R. W. Pogge, D. Polishook, I.-G. Shin, A. Shporer, J. C. Yee, F. Abe, A. Bhattacharya, I. A. Bond, C. S. Botzler, M. Freeman, A. Fukui, Y. Itow, N. Koshimoto, C. H. Ling, K. Masuda, Y. Matsubara, Y. Muraki, K. Ohnishi, L. C. Philpott, N. Rattenbury, To. Saito, D. J. Sullivan, T. Sumi, D. Suzuki, P. J. Tristram, A. Yonehara, V. Bozza, S. Calchi Novati, S. Ciceri, Pasquale Grant, S.-H. Gu, K. Harpsøe, T. C. Hinse, U. G. Jørgensen, D. Juncher, H. Korhonen, L. Mancini, C. Melchiorre, A. Popovas, A. Postiglione, M. Rabus, S. Rahvar, R. W. Schmidt, G. Scarpetta, J. Skottfelt, John Southworth, An. Stabile, J. Surdej, X.-B. Wang, O. Wertz

School of Physics and Astronomy

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

Abstract

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 (Amax ~ 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 (~3M⨁) 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.

Original language	English
Journal	Astrophysical Journal
Volume	812
Issue number	2
Early online date	16 Oct 2015
DOIs	https://doi.org/10.1088/0004-637X/812/2/136
Publication status	Published - 20 Oct 2015

Keywords

Gravitational lensing: micro
Planetary systems
Techniques: photometric

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

Bachelet_noise_2015
© 2015. The American Astronomical Society. All rights reserved. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://dx.doi.org/10.1088/0004-637X/812/2/136
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Bachelet, E., Bramich, D. M., Han, C., Greenhill, J., Street, R. A., Gould, A., D’Ago, G., AlSubai, K., Dominik, M., Figuera Jaimes, R. J., Horne, K. D., Hundertmark, M. P. G., Kains, N., Snodgrass, C., Steele, I. A., Tsapras, Y., Albrow, M. D., Batista, V., Beaulieu, J.-P., ... Wertz, O. (2015). Red noise versus planetary interpretations in the microlensing event Ogle-2013-BLG-446. Astrophysical Journal, 812(2). https://doi.org/10.1088/0004-637X/812/2/136

@article{a560f2636c824c689d5543660fe0f24f,

title = "Red noise versus planetary interpretations in the microlensing event Ogle-2013-BLG-446",

abstract = "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 (Amax \textasciitilde{} 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 (\textasciitilde{}3M⨁) 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.",

keywords = "Gravitational lensing: micro, Planetary systems, Techniques: photometric",

author = "E. Bachelet and Bramich, \{D. M.\} and C. Han and J. Greenhill and Street, \{R. A.\} and A. Gould and G. D{\textquoteright}Ago and K. AlSubai and Martin Dominik and \{Figuera Jaimes\}, \{Roberto Jose\} and Horne, \{Keith Douglas\} and Hundertmark, \{Markus Peter Gerhard\} and N. Kains and C. Snodgrass and Steele, \{I. A.\} and Y. Tsapras and Albrow, \{M. D.\} and V. Batista and J.-P. Beaulieu and Bennett, \{D. P.\} and S. Brillant and Caldwell, \{J. A. R.\} and A. Cassan and A. Cole and C. Coutures and S. Dieters and \{Dominis Prester\}, D. and J. Donatowicz and P. Fouqu{\'e} and K. Hill and J.-B. Marquette and J. Menzies and C. Pere and C. Ranc and J. Wambsganss and D. Warren and \{de Almeida\}, \{L. Andrade\} and J.-Y. Choi and DePoy, \{D. L.\} and S. Dong and L.-W. Hung and K.-H. Hwang and F. Jablonski and Jung, \{Y. K.\} and S. Kaspi and N. Klein and C.-U. Lee and D. Maoz and Mu{\~n}oz, \{J. A.\} and D. Nataf and H. Park and Pogge, \{R. W.\} and D. Polishook and I.-G. Shin and A. Shporer and Yee, \{J. C.\} and F. Abe and A. Bhattacharya and Bond, \{I. A.\} and Botzler, \{C. S.\} and M. Freeman and A. Fukui and Y. Itow and N. Koshimoto and Ling, \{C. H.\} and K. Masuda and Y. Matsubara and Y. Muraki and K. Ohnishi and Philpott, \{L. C.\} and N. Rattenbury and To. Saito and Sullivan, \{D. J.\} and T. Sumi and D. Suzuki and Tristram, \{P. J.\} and A. Yonehara and V. Bozza and \{Calchi Novati\}, S. and S. Ciceri and Pasquale Grant and S.-H. Gu and K. Harps{\o}e and Hinse, \{T. C.\} and J{\o}rgensen, \{U. G.\} and D. Juncher and H. Korhonen and L. Mancini and C. Melchiorre and A. Popovas and A. Postiglione and M. Rabus and S. Rahvar and Schmidt, \{R. W.\} and G. Scarpetta and J. Skottfelt and John Southworth and An. Stabile and J. Surdej and X.-B. Wang and O. Wertz",

note = "K.A.A., M.D., K.H., M.H., C.S., R.A.S., and Y.T. are thankful to Qatar National Research Fund (QNRF), member of Qatar Foundation, for support by grant NPRP 09-476-1-078. ",

year = "2015",

month = oct,

day = "20",

doi = "10.1088/0004-637X/812/2/136",

language = "English",

volume = "812",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

Bachelet, E, Bramich, DM, Han, C, Greenhill, J, Street, RA, Gould, A, D’Ago, G, AlSubai, K, Dominik, M, Figuera Jaimes, RJ, Horne, KD, Hundertmark, MPG, Kains, N, Snodgrass, C, Steele, IA, Tsapras, Y, Albrow, MD, Batista, V, Beaulieu, J-P, Bennett, DP, Brillant, S, Caldwell, JAR, Cassan, A, Cole, A, Coutures, C, Dieters, S, Dominis Prester, D, Donatowicz, J, Fouqué, P, Hill, K, Marquette, J-B, Menzies, J, Pere, C, Ranc, C, Wambsganss, J, Warren, D, de Almeida, LA, Choi, J-Y, DePoy, DL, Dong, S, Hung, L-W, Hwang, K-H, Jablonski, F, Jung, YK, Kaspi, S, Klein, N, Lee, C-U, Maoz, D, Muñoz, JA, Nataf, D, Park, H, Pogge, RW, Polishook, D, Shin, I-G, Shporer, A, Yee, JC, Abe, F, Bhattacharya, A, Bond, IA, Botzler, CS, Freeman, M, Fukui, A, Itow, Y, Koshimoto, N, Ling, CH, Masuda, K, Matsubara, Y, Muraki, Y, Ohnishi, K, Philpott, LC, Rattenbury, N, Saito, T, Sullivan, DJ, Sumi, T, Suzuki, D, Tristram, PJ, Yonehara, A, Bozza, V, Calchi Novati, S, Ciceri, S, Grant, P, Gu, S-H, Harpsøe, K, Hinse, TC, Jørgensen, UG, Juncher, D, Korhonen, H, Mancini, L, Melchiorre, C, Popovas, A, Postiglione, A, Rabus, M, Rahvar, S, Schmidt, RW, Scarpetta, G, Skottfelt, J, Southworth, J, Stabile, A, Surdej, J, Wang, X-B & Wertz, O 2015, 'Red noise versus planetary interpretations in the microlensing event Ogle-2013-BLG-446', Astrophysical Journal, vol. 812, no. 2. https://doi.org/10.1088/0004-637X/812/2/136

TY - JOUR

T1 - Red noise versus planetary interpretations in the microlensing event Ogle-2013-BLG-446

AU - Bachelet, E.

AU - Bramich, D. M.

AU - Han, C.

AU - Greenhill, J.

AU - Street, R. A.

AU - Gould, A.

AU - D’Ago, G.

AU - AlSubai, K.

AU - Dominik, Martin

AU - Figuera Jaimes, Roberto Jose

AU - Horne, Keith Douglas

AU - Hundertmark, Markus Peter Gerhard

AU - Kains, N.

AU - Snodgrass, C.

AU - Steele, I. A.

AU - Tsapras, Y.

AU - Albrow, M. D.

AU - Batista, V.

AU - Beaulieu, J.-P.

AU - Bennett, D. P.

AU - Brillant, S.

AU - Caldwell, J. A. R.

AU - Cassan, A.

AU - Cole, A.

AU - Coutures, C.

AU - Dieters, S.

AU - Dominis Prester, D.

AU - Donatowicz, J.

AU - Fouqué, P.

AU - Hill, K.

AU - Marquette, J.-B.

AU - Menzies, J.

AU - Pere, C.

AU - Ranc, C.

AU - Wambsganss, J.

AU - Warren, D.

AU - de Almeida, L. Andrade

AU - Choi, J.-Y.

AU - DePoy, D. L.

AU - Dong, S.

AU - Hung, L.-W.

AU - Hwang, K.-H.

AU - Jablonski, F.

AU - Jung, Y. K.

AU - Kaspi, S.

AU - Klein, N.

AU - Lee, C.-U.

AU - Maoz, D.

AU - Muñoz, J. A.

AU - Nataf, D.

AU - Park, H.

AU - Pogge, R. W.

AU - Polishook, D.

AU - Shin, I.-G.

AU - Shporer, A.

AU - Yee, J. C.

AU - Abe, F.

AU - Bhattacharya, A.

AU - Bond, I. A.

AU - Botzler, C. S.

AU - Freeman, M.

AU - Fukui, A.

AU - Itow, Y.

AU - Koshimoto, N.

AU - Ling, C. H.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Muraki, Y.

AU - Ohnishi, K.

AU - Philpott, L. C.

AU - Rattenbury, N.

AU - Saito, To.

AU - Sullivan, D. J.

AU - Sumi, T.

AU - Suzuki, D.

AU - Tristram, P. J.

AU - Yonehara, A.

AU - Bozza, V.

AU - Calchi Novati, S.

AU - Ciceri, S.

AU - Grant, Pasquale

AU - Gu, S.-H.

AU - Harpsøe, K.

AU - Hinse, T. C.

AU - Jørgensen, U. G.

AU - Juncher, D.

AU - Korhonen, H.

AU - Mancini, L.

AU - Melchiorre, C.

AU - Popovas, A.

AU - Postiglione, A.

AU - Rabus, M.

AU - Rahvar, S.

AU - Schmidt, R. W.

AU - Scarpetta, G.

AU - Skottfelt, J.

AU - Southworth, John

AU - Stabile, An.

AU - Surdej, J.

AU - Wang, X.-B.

AU - Wertz, O.

N1 - K.A.A., M.D., K.H., M.H., C.S., R.A.S., and Y.T. are thankful to Qatar National Research Fund (QNRF), member of Qatar Foundation, for support by grant NPRP 09-476-1-078.

PY - 2015/10/20

Y1 - 2015/10/20

N2 - 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 (Amax ~ 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 (~3M⨁) 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.

AB - 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 (Amax ~ 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 (~3M⨁) 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.

KW - Gravitational lensing: micro

KW - Planetary systems

KW - Techniques: photometric

UR - http://adsabs.harvard.edu/abs/2015ApJ...812..136B

U2 - 10.1088/0004-637X/812/2/136

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

M3 - Article

SN - 0004-637X

VL - 812

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Red noise versus planetary interpretations in the microlensing event Ogle-2013-BLG-446

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Astronomy at St Andrews 2015-2018: Astronomy at St Andrews 2015-2018

Planet population statistics: Planet population statistics from fully-deterministic microlensing campaigns

Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014

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Red noise versus planetary interpretations in the microlensing event Ogle-2013-BLG-446

Abstract

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Other files and links

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Astronomy at St Andrews 2015-2018: Astronomy at St Andrews 2015-2018

Planet population statistics: Planet population statistics from fully-deterministic microlensing campaigns

Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014

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