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New Techniques for High-Contrast Imaging with ADI: The ACORNS-ADI SEEDS Data Reduction Pipeline
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Author and Affiliation:
Brandt, Timothy D.(Princeton Univ., Dept. of Astrophysical Sciences, NJ, United States);
McElwain, Michael W.(NASA Goddard Space Flight Center, Greenbelt, MD, United States);
Turner, Edwin L.(Princeton Univ., Dept. of Astrophysical Sciences, NJ, United States);
Abe, L.(Laboratoire Hippolyte Fizeau, Nice, France);
Brandner, W.(Max-Planck-Inst. fuer Astronomie, Heidelberg, Germany);
Carson, J.(Charleston Univ., Charleston, SC, United States);
Egner, S.(Subaru Telescope, Hilo, HI, United States);
Feldt, M.(Max-Planck-Inst. fuer Astronomie, Heidelberg, Germany);
Golota, T.(Subaru Telescope, Hilo, HI, United States);
Grady, C. A.(NASA Goddard Space Flight Center, Greenbelt, MD, United States);
Guyon, O.(Subaru Telescope, Hilo, HI, United States);
Hashimoto, J.(National Astronomical Observatory, Tokyo, Japan);
Hayano, Y.(Subaru Telescope, Hilo, HI, United States);
Hayashi, M.(National Astronomical Observatory, Tokyo, Japan);
Hayashi, S.(Subaru Telescope, Hilo, HI, United States);
Henning, T.(Max-Planck-Inst. fuer Astronomie, Heidelberg, Germany);
Hodapp, K. W.(Hawaii Univ., Inst. for Astronomy, Hilo, HI, United States);
Ishil, M.(Subaru Telescope, Hilo, HI, United States);
Lye, M.(National Astronomical Observatory, Tokyo, Japan);
Janson, M.(Princeton Univ., Dept. of Astrophysical Sciences, NJ, United States);
Kandori, R.(National Astronomical Observatory, Tokyo, Japan);
Knapp, G. R.(Princeton Univ., Dept. of Astrophysical Sciences, NJ, United States);
Kudo, T.(National Astronomical Observatory, Tokyo, Japan);
Kusakabe, N.(National Astronomical Observatory, Tokyo, Japan);
Kuzuhara, M.(National Astronomical Observatory, Tokyo, Japan);
et al.
Abstract: We describe Algorithms for Calibration, Optimized Registration, and Nulling the Star in Angular Differential Imaging (ACORNS-ADI), a new, parallelized software package to reduce high-contrast imaging data, and its application to data from the Strategic Exploration of Exoplanets and Disks (SEEDS) survey. We implement seyeral new algorithms, includbg a method to centroid saturated images, a trimmed mean for combining an image sequence that reduces noise by up to approx 20%, and a robust and computationally fast method to compute the sensitivitv of a high-contrast obsen-ation everywhere on the field-of-view without introducing artificial sources. We also include a description of image processing steps to remove electronic artifacts specific to Hawaii2-RG detectors like the one used for SEEDS, and a detailed analysis of the Locally Optimized Combination of Images (LOCI) algorithm commonly used to reduce high-contrast imaging data. ACORNS-ADI is efficient and open-source, and includes several optional features which may improve performance on data from other instruments. ACORNS-ADI is freely available for download at www.github.com/t-brandt/acorns_-adi under a BSD license
Publication Date: Jan 01, 2012
Document ID:
20130009909
(Acquired Feb 21, 2013)
Subject Category: ASTRONOMY
Report/Patent Number: GSFC.JA.7411.2012
Document Type: Preprint
Contract/Grant/Task Num: NFS DGE-0646086
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
National Science Foundation; Arlington, VA, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 15p; In English; Original contains black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: ALGORITHMS; APPLICATIONS PROGRAMS (COMPUTERS); IMAGE PROCESSING; IMAGING TECHNIQUES; CENTROIDS; IMAGE CONTRAST; CALIBRATING; EXTRASOLAR PLANETS; DATA REDUCTION; SKY SURVEYS (ASTRONOMY); PLANET DETECTION
Miscellaneous Notes: to be published in The Astrophysical Journal
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