Survey Strategy
The J-PLUS survey is divided in two parts, one “shallow” aimed at providing the calibration for J-PAS and one “deep” aimed at providing an unprecedented study of star forming galaxies in the local Universe.
The exposure times vary depending on the distance and phase of the Moon.
The expected limiting magnitude for the different filters, assuming S/N ~ 3, an aperture of 2.4arsec, a psf of 1.2arcsec and a grey night, are listed in the following table:
| Filter | Limiting Magnitude |
|---|---|
| uJAVA | 21,5 |
| J0378 | 21,5 |
| J0395 | 21,5 |
| J0410 | 21,5 |
| J0430 | 21,5 |
| gSDSS | 23,2 |
| J0515 | 21,5 |
| rSDSS | 23,2 |
| J0660 | 21,5 |
| iSDSS | 21,5 |
| J0816 | 21,5 |
| zSDSS | 20,5 |
The filters gSDSS, rSDSS, and iSDSS will be observed four times (three dithered exposures per time), separated by one week to study variability.
The goal of the J-PLUS deep is to achieve S/N~3 for a 2.4 arcsec aperture, assuming an average 1.2 arcsec seeing at the magnitudes shown in the following list.
The deep part of J-PLUS will focus on:
| Filter | Limiting Magnitude |
|---|---|
| uJAVA | 23 |
| J0378 | 22,5 |
| J0660 | 22,5 |
| zSDSS | 21,1 |