Skip to Main content Skip to Navigation
Journal articles

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 ∼ 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.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03644722
Contributor : Hal Sorbonne Université Gestionnaire Connect in order to contact the contributor
Submitted on : Tuesday, April 19, 2022 - 1:57:32 PM
Last modification on : Wednesday, June 1, 2022 - 3:58:03 AM

Links full text

Identifiers

Citation

E. Bachelet, D. M. Bramich, C. Han, J. Greenhill, R. A. Street, et al.. Red Noise Versus Planetary Interpretations in the Microlensing Event Ogle-2013-BLG-446. The Astrophysical Journal, 2015, 812, ⟨10.1088/0004-637X/812/2/136⟩. ⟨insu-03644722⟩

Share

Metrics

Record views

1