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Criteria for Sample Selection to Maximize Planet Sensitivity and Yield from Space-Based Microlens Parallax Surveys

Yee, Jennifer C. and Gould, Andrew and Beichman, Charles and Calchi Novati, Sebastiano and Carey, Sean and Gaudi, B. Scott and Henderson, Calen B. and Nataf, David and Penny, Matthew and Shvartzvald, Yossi and Zhu, Wei (2015) Criteria for Sample Selection to Maximize Planet Sensitivity and Yield from Space-Based Microlens Parallax Surveys. Astrophysical Journal, 810 (2). Art. No. 155. ISSN 0004-637X.

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Space-based microlens parallax measurements are a powerful tool for understanding planet populations, especially their distribution throughout the Galaxy. However, if space-based observations of the microlensing events must be specifically targeted, it is crucial that microlensing events enter the parallax sample without reference to the known presence or absence of planets. Hence, it is vital to define objective criteria for selecting events where possible and to carefully consider and minimize the selection biases where not possible so that the final sample represents a controlled experiment. We present objective criteria for initiating observations and determining their cadence for a subset of events, and we define procedures for isolating subjective decision making from information about detected planets for the remainder of events. We also define procedures to resolve conflicts between subjective and objective selections. These procedures maximize the planet sensitivity of the sample as a whole by allowing for planet detections even if they occur before satellite observations for objectively selected events and by helping to trigger fruitful follow-up observations for subjectively chosen events. This paper represents our public commitment to these procedures, which is a necessary component of enforcing objectivity on the experimental protocol. They will be implemented for the 2015 Spitzer microlensing campaign.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Calchi Novati, Sebastiano0000-0002-7669-1069
Carey, Sean0000-0002-0221-6871
Henderson, Calen B.0000-0001-8877-9060
Zhu, Wei0000-0003-4027-4711
Additional Information:© 2015 The American Astronomical Society. Received 2015 April 29; accepted 2015 August 9; published 2015 September 9. Work by J.C.Y., A.G., and S.C. was supported by JPL grant 1500811. Work by J.C.Y. was performed under contract with the California Institute of Technology (Caltech)/Jet Propulsion Laboratory (JPL) funded by NASA through the Sagan Fellowship Program executed by the NASA Exoplanet Science Institute. D.M.N. was supported by the Australian Research Council grant FL110100012.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Australian Research CouncilFL110100012
Subject Keywords:gravitational lensing: micro
Record Number:CaltechAUTHORS:20151027-120207794
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61562
Deposited By: George Porter
Deposited On:27 Oct 2015 20:16
Last Modified:14 Nov 2017 23:45

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