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THE DATA REDUCTION PIPELINE FOR THE APACHE POINT OBSERVATORY GALACTIC EVOLUTION EXPERIMENT

Nidever, DL and Holtzman, JA and Allende Prieto, C and Beland, S and Bender, C and Bizyaev, D and Burton, A and Desphande, R and Fleming, SW and Garcia Perez, AE and Hearty, FR and Majewski, SR and Meszaros, S and Muna, D and Nguyen, D and Schiavon, RP and Shetrone, M and Skrutskie, MF and Sobeck, JS and Wilson, JC (2015) THE DATA REDUCTION PIPELINE FOR THE APACHE POINT OBSERVATORY GALACTIC EVOLUTION EXPERIMENT. ASTRONOMICAL JOURNAL, 150 (6). pp. 1-23. ISSN 0004-6256

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Abstract

The Apache Point Observatory Galactic Evolution Experiment (APOGEE), part of the Sloan Digital Sky Survey III, explores the stellar populations of the Milky Way using the Sloan 2.5-m telescope linked to a high resolution (R ~ 22,500), near-infrared (1.51–1.70 µm) spectrograph with 300 optical fibers. For over 150,000 predominantly red giant branch stars that APOGEE targeted across the Galactic bulge, disks and halo, the collected high signal-to-noise ratio (>100 per half-resolution element) spectra provide accurate (~0.1 km s-1) RVs, stellar atmospheric parameters, and precise (lesssim0.1 dex) chemical abundances for about 15 chemical species. Here we describe the basic APOGEE data reduction software that reduces multiple 3D raw data cubes into calibrated, well-sampled, combined 1D spectra, as implemented for the SDSS-III/APOGEE data releases (DR10, DR11 and DR12). The processing of the near-IR spectral data of APOGEE presents some challenges for reduction, including automated sky subtraction and telluric correction over a 3°-diameter field and the combination of spectrally dithered spectra. We also discuss areas for future improvement.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
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Date Deposited: 11 Jan 2016 10:00
Last Modified: 11 Jan 2016 10:01
DOI or Identification number: 10.1088/0004-6256/150/6/173
URI: http://researchonline.ljmu.ac.uk/id/eprint/2562

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