Calibration plan for J-PAS and J-PLUS surveys

J-PAS survey consists of an 8000 square degree photometric sky survey with a set of 54 narrow-band, 2 mediumband and 1 broad-band filters. The main goal is to produce a photo-redshift catalog of 15 millions red, earlytype galaxies with a precision (z) 0:003(1 + z) to measure the Baryonic Acoustic Oscillation (BAO). Such precision requires specific care in the photometric calibration survey. This contribution presents the calibration protocol developed at CEFCA for the J-PAS data and to be applied from its first day. An auxiliary telescope JAST/T80 will perform an initial survey, J-PLUS, available before J-PAS, to create a set of flux calibrated stars in all J-PAS fields. Seven reference stars were already chosen to calibrate in flux the J-PLUS survey. J-PLUS 12-filter system was also specifically optimized to retrieve stellar parameters, T, log(g), [Fe/H], through the fitting of flux calibrated models. J-PLUS will be used as the standard network of flux calibrated stars to create synthetic spectro-photometry for J-PAS 56-filter system and to achieve the 1% photometric precision required for BAO measurements.

[1]  A. J. Cenarro,et al.  The Javalambre Astrophysical Observatory project , 2010, Astronomical Telescopes + Instrumentation.

[2]  A. J. Cenarro,et al.  Design of the J-PAS and J-PLUS filter systems , 2012, Other Conferences.

[3]  Coryn A. L. Bailer-Jones,et al.  Evolutionary design of photometric systems and its application to Gaia , 2004, ArXiv.

[4]  A. J. Cenarro,et al.  Scheduler software for the Observatorio Astrofísico de Javalambre , 2012, Other Conferences.

[5]  A. J. Cenarro,et al.  J-PAS data management pipeline and archiving , 2012, Other Conferences.

[6]  A. J. Cenarro,et al.  The Observatorio Astrofísico de Javalambre: engineering of observatory facilities and physical infrastructure, goals, and current status , 2014, Astronomical Telescopes and Instrumentation.

[7]  R. Schiavon,et al.  A library of high resolution synthetic stellar spectra from 300 nm to 1.8 μm with solar and α-enhanced composition , 2005, astro-ph/0505511.

[8]  M. Grenon,et al.  The design and performance of the Gaia photometric system , 2005, astro-ph/0512038.

[9]  S. Roweis,et al.  An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data , 2007, astro-ph/0703454.

[10]  F. Castander,et al.  MEASURING BARYON ACOUSTIC OSCILLATIONS ALONG THE LINE OF SIGHT WITH PHOTOMETRIC REDSHIFS: THE PAU SURVEY , 2009 .

[11]  A. J. Cenarro,et al.  The Observatorio Astrofísico de Javalambre: goals and current status , 2012, Other Conferences.

[12]  A. Pickles,et al.  All-Sky Spectrally Matched UBVRI - ZY and u′ g′ r′ i′ z′ Magnitudes for Stars in the Tycho2 Catalog , 2010, 1011.2020.

[13]  Coryn A.L. Bailer-Jones.  Stellar parameters from very low resolution spectra and medium band filters Te , log g and (M/H) using neural networks , 2000 .

[14]  M. Bessell.  Standard Photometric Systems , 2005 .