Data Release 2 of S-PLUS: Accurate template-fitting based photometry covering 1000 deg2 in 12 optical filters
Molino, A.; Werle, A.; Mendes de Oliveira, C.; Beers, T. C.; Placco, V. M.; Alonso-García, J.; Overzier, R. A.; Bom, C. R.; Chies-Santos, A. L.; Sodré, L.; Lopes de Oliveira, R.; Perottoni, H. D.; Almeida-Fernandes, F.; Schoenell, W.; Gutiérrez-Soto, L. A.; Bonatto, C. J.; Oliveira Schwarz, G. B.; Kanaan, A.; Whitten, D. D.; Navarete, F.; Ribeiro, T.; Coelho, P.; Barbosa, C. E.; Herpich, F. R.; Hartmann, E. A.; Nakazono, L. M. I.; Santos-Silva, T.; Barbosa, C. L.; Buzzo, M. L.; Vitorelli, A. Z.; Bolutavicius, G. F.; SamPedro, L.; de Lima, E. V. R.; Costa Duarte, M. V.; Teixeira, G. S. M.
Brazil, Italy, United States, Chile, China
Abstract
The Southern Photometric Local Universe Survey (S-PLUS) is an ongoing survey of ~9300 deg2 in the southern sky in a 12-band photometric system. This paper presents the second data release (DR2) of S-PLUS, consisting of 514 tiles covering an area of 950 deg2. The data has been fully calibrated using a new photometric calibration technique suitable for the new generation of wide-field multifilter surveys. This technique consists of a χ2 minimization to fit synthetic stellar templates to already calibrated data from other surveys, eliminating the need for standard stars and reducing the survey duration by ~15 per cent. We compare the template-predicted and S-PLUS instrumental magnitudes to derive the photometric zero-points (ZPs). We show that these ZPs can be further refined by fitting the stellar templates to the 12 S-PLUS magnitudes, which better constrain the models by adding the narrow-band information. We use the STRIPE82 region to estimate ZP errors, which are ≲ 10 mmags for filters J0410, J0430, g, J0515, r, J0660, i, J0861 and z; ≲ 15 mmags for filter J0378; and ≲ 25 mmags for filters u and J0395. We describe the complete data flow of the S-PLUS/DR2 from observations to the final catalogues and present a brief characterization of the data. We show that, for a minimum signal-to-noise threshold of 5, the photometric depths of the DR2 range from 19.1 to 20.5 mag (measured in Petrosian apertures), depending on the filter. The S-PLUS DR2 can be accessed from the website: https://splus.cloud.