Assessing the photometric redshift precision of the S-PLUS survey: the Stripe-82 as a test-case. (arXiv:1907.06315v1 [astro-ph.GA])

Assessing the photometric redshift precision of the S-PLUS survey: the Stripe-82 as a test-case. (arXiv:1907.06315v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Molino_A/0/1/0/all/0/1">A. Molino</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Costa_Duarte_M/0/1/0/all/0/1">M. V. Costa-Duarte</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sampedro_L/0/1/0/all/0/1">L. Sampedro</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Herpich_F/0/1/0/all/0/1">F. R. Herpich</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Sodre_L/0/1/0/all/0/1">L. Sodré Jr.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oliveira_C/0/1/0/all/0/1">C. Mendes de Oliveira</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schoenell_W/0/1/0/all/0/1">W. Schoenell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Barbosa_C/0/1/0/all/0/1">C. E. Barbosa</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Queiroz_C/0/1/0/all/0/1">C. Queiroz</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lima_E/0/1/0/all/0/1">E. V. R. Lima</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Azanha_L/0/1/0/all/0/1">L. Azanha</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Munoz_Elgueta_N/0/1/0/all/0/1">N. Muñoz-Elgueta</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Ribeiro_T/0/1/0/all/0/1">T. Ribeiro</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kanaan_A/0/1/0/all/0/1">A. Kanaan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hernandez_Jimenez_J/0/1/0/all/0/1">J. A. Hernandez-Jimenez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Cortesi_A/0/1/0/all/0/1">A. Cortesi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Akras_S/0/1/0/all/0/1">S. Akras</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oliveira_R/0/1/0/all/0/1">R. Lopes de Oliveira</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Torres_Flores_S/0/1/0/all/0/1">S. Torres-Flores</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lima_Dias_C/0/1/0/all/0/1">C. Lima-Dias</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Castellon_J/0/1/0/all/0/1">J. L. Nilo Castellon</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Damke_G/0/1/0/all/0/1">G. Damke</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Alvarez_Candal_A/0/1/0/all/0/1">A. Alvarez-Candal</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jimenez_Teja_Y/0/1/0/all/0/1">Y. Jiménez-Teja</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Coelho_P/0/1/0/all/0/1">P. Coelho</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Pereira_E/0/1/0/all/0/1">E. Pereira</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Montero_Dorta_A/0/1/0/all/0/1">A. D. Montero-Dorta</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Benitez_N/0/1/0/all/0/1">N. Benítez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Goncalves_T/0/1/0/all/0/1">T. S. Gonçalves</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Santana_Silva_L/0/1/0/all/0/1">L. Santana-Silva</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Werner_S/0/1/0/all/0/1">S. V. Werner</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Almeida_L/0/1/0/all/0/1">L. A. Almeida</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lopes_P/0/1/0/all/0/1">P. A. A. Lopes</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chies_Santos_A/0/1/0/all/0/1">A. L. Chies-Santos</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Telles_E/0/1/0/all/0/1">E. Telles</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Souza_T/0/1/0/all/0/1">Thom de Souza</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+C%2E_R/0/1/0/all/0/1">R. C.</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Goncalves_D/0/1/0/all/0/1">D. R. Gonçalves</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Souza_R/0/1/0/all/0/1">R. S. de Souza</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Makler_M/0/1/0/all/0/1">M. Makler</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Placco_V/0/1/0/all/0/1">V. M. Placco</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nakazono_L/0/1/0/all/0/1">L. M. I. Nakazono</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Saito_R/0/1/0/all/0/1">R. K. Saito</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Overzier_R/0/1/0/all/0/1">R. A. Overzier</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Abramo_L/0/1/0/all/0/1">L. R. Abramo</a>

In this paper we present a thorough discussion about the photometric redshift
(photo-z) performance of the Southern Photometric Local Universe Survey
(S-PLUS). This survey combines a 7 narrow + 5 broad passband filter system,
with a typical photometric-depth of r$sim$21 AB. For this exercise, we utilize
the Data Release 1 (DR1), corresponding to 336 deg$^{2}$ from the Stripe-82
region. We rely on the texttt{BPZ2} code to compute our estimates, using a new
library of SED models, which includes additional templates for quiescent
galaxies. When compared to a spectroscopic redshift control sample of
$sim$100k galaxies, we find a precision of $sigma_{z}<$0.8%, $<$2.0% or
$<$3.0% for galaxies with magnitudes r$<$17, $<$19 and $<$21, respectively. A
precision of 0.6% is attained for galaxies with the highest texttt{Odds}
values. These estimates have a negligible bias and a fraction of catastrophic
outliers inferior to 1%. We identify a redshift window (i.e., 0.26$<z<$0.32)
where our estimates double their precision, due to the simultaneous detection
of two emission-lines in two distinct narrow-bands; representing a window
opportunity to conduct statistical studies such as luminosity functions. We
forecast a total of $sim$2M, $sim$16M and $sim$32M galaxies in the S-PLUS
survey with a photo-z precision of $sigma_{z}<$1.0%, $<$2.0% and $<$2.5%
after observing 8000 $deg^{2}$. We also derive redshift Probability Density
Functions, proving their reliability encoding redshift uncertainties and their
potential recovering the $n(z)$ of galaxies at $z<0.4$, with an unprecedented
precision for a photometric survey in the southern hemisphere.

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