학술논문
THE DATA REDUCTION PIPELINE for the SDSS-IV MaNGA IFU GALAXY SURVEY
Document Type
article
Author
Law, DR; Cherinka, B; Yan, R; Andrews, BH; Bershady, MA; Bizyaev, D; Blanc, GA; Blanton, MR; Bolton, AS; Brownstein, JR; Bundy, K; Chen, Y; Drory, N; D'Souza, R; Fu, H; Jones, A; Kauffmann, G; MacDonald, N; Masters, KL; Newman, JA; Parejko, JK; Sánchez-Gallego, JR; Sánchez, SF; Schlegel, DJ; Thomas, D; Wake, DA; Weijmans, AM; Westfall, KB; Zhang, K
Source
Astronomical Journal. 152(4)
Subject
Language
Abstract
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is an optical fiber-bundle integral-field unit (IFU) spectroscopic survey that is one of three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV). With a spectral coverage of 3622-10354 A and an average footprint of ∼500 arcsec2 per IFU the scientific data products derived from MaNGA will permit exploration of the internal structure of a statistically large sample of 10,000 low-redshift galaxies in unprecedented detail. Comprising 174 individually pluggable science and calibration IFUs with a near-constant data stream, MaNGA is expected to obtain ∼100 million raw-frame spectra and ∼10 million reduced galaxy spectra over the six-year lifetime of the survey. In this contribution, we describe the MaNGA Data Reduction Pipeline algorithms and centralized metadata framework that produce sky-subtracted spectrophotometrically calibrated spectra and rectified three-dimensional data cubes that combine individual dithered observations. For the 1390 galaxy data cubes released in Summer 2016 as part of SDSS-IV Data Release 13, we demonstrate that the MaNGA data have nearly Poisson-limited sky subtraction shortward of ∼8500 A and reach a typical 10σ limiting continuum surface brightness μ = 23.5 AB arcsec-2 in a five-arcsecond-diameter aperture in the g-band. The wavelength calibration of the MaNGA data is accurate to 5 km s-1 rms, with a median spatial resolution of 2.54 arcsec FWHM (1.8 kpc at the median redshift of 0.037) and a median spectral resolution of σ = 72 km s-1.