A full implementation of spectro-perfectionism for precise radial velocity exoplanet detection: a test case with the MINERVA reduction pipeline.

Cornachione, Matthew A. and Bolton, Adam S. and Eastman, Jason D. and Wilson, Maurice L. and Wang, Sharon X. and Johnson, Samson A. and Sliski, David H. and McCrady, Nate and Wright, Jason T. and Plavchan, Peter and Johnson, John Asher and Horner, Jonathan and Wittenmyer, Robert A. (2019) A full implementation of spectro-perfectionism for precise radial velocity exoplanet detection: a test case with the MINERVA reduction pipeline. Publications of the Astronomical Society of the Pacific, 131 (1006 - Article 12450). ISSN 0004-6280

Abstract

We present a computationally tractable implementation of spectro-perfectionism, a method which minimizes error imparted by spectral extraction. We develop our method in conjunction with a full raw reduction pipeline for the MINiature Exoplanet Radial Velocity Array (MINERVA), capable of performing both optimal extraction and spectro-perfectionism. Although spectro-perfectionism remains computationally expensive, our implementation can extract a MINERVA exposure in approximately 30 minutes. We describe our localized extraction procedure and our approach to point-spread function (PSF) fitting. We compare the performance of both extraction methods on a set of 119 exposures on HD 122064, an RV standard star. Both the optimal extraction and spectro-perfectionism pipelines achieve nearly identical RV precision under a six-exposure chronological binning. We discuss the importance of reliable calibration data for PSF fitting and the potential of spectro-perfectionism for future precise radial velocity exoplanet studies.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 24 Jan 2020 01:52
Last Modified: 07 Feb 2020 02:07
Uncontrolled Keywords: Planets and satellites, Detection techniques, Image processing, Radial velocities, Spectroscopic
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020199 Astronomical and Space Sciences not elsewhere classified
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1088/1538-3873/ab4103
URI: http://eprints.usq.edu.au/id/eprint/37834

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