The Southern Photometric Local Universe Survey (S-PLUS) : improved SEDs, morphologies, and redshifts with 12 optical filters

Abstract

The Southern Photometric Local Universe Survey (S-PLUS) is imaging~300 deg2 of the celestial sphere in 12 optical bands using a dedicated 0.8 m robotic telescope, the T80-South, at the Cerro Tololo Inter-american Observatory, Chile. The telescope is equipped with a 9.2k×9.2k e2v detector with 10μm pixels, resulting in a field of view of 2 deg2 with a platescale of 0.55 arcsec pixel−1. The survey consists of four main subfields, which include twonon-contiguous fields at high Galactic latitudes (|b|>30◦, 8000 deg2) and two areas of the Galactic Disc and Bulge (for an additional 1300 deg2). S-PLUS uses the Javalambre 12-band magnitude system, which includes the 5ugrizbroad-band filters and 7 narrow-band filters centred on prominent stellar spectral features: the Balmer jump/[OII], Ca H+K, Hδ, Gband, Mg b triplet, Hα, and the Ca triplet. S-PLUS delivers accurate photometric redshifts (δz/(1+z)=0.02 or better) for galaxies withr<19.7 AB mag andz<0.4, thus producing a 3D map of the local Universe over a volume of more than 1 (Gpc/h)3. The final S-PLUS catalogue will also enable the study of star formation and stellar populations in and around the MilkyWay and nearby galaxies, as well as searches for quasars, variable sources, and low-metallicity stars. In this paper we introduce the main characteristics of the survey, illustrated with science verification data highlighting the unique capabilities of S-PLUS. We also present the first public data release of ~336 deg2 of the Stripe 82 area, in 12 bands, to a limiting magnitude ofr=21, available atdatalab.noao.edu/splus.