J-PLUS Data Release DR1

The J-PLUS First Data Release (July 2018) (J-PLUS-DR1) comprises 511 J-PLUS fields observed in twelve optical bands amounting to 1022deg2. J-PLUS DR1 is based on images collected from November 2015 to January 2018 by the JAST80 telescope.

Detailed information of the data release in this DR1 can be found here.

For a list of known issues and particular aspects of the data that should be kept in mind, please follow this link.

Finally, for quick access to the archive and the User's Manual, you can use the following links.

IMPORTANT UPDATE: Added Photometric Calibration with Stellar and White Dwarf Loci (SWDL). Please, read here.


Total area covered 1022 deg2 (~900 deg2 after masking)
Image size 9500x9500 pixels (~2 deg2)
Image pixel scale 0.555 arcsec
Total number of fields 511
Number of objects in dual catalogue ~13.4 million (~8.4 million with MAG_AUTO(rSDSS)≤21)
Number of detections in single catalogue ~92.6 million
Images Total Size (compressed) ~600 GB
Catalogue Database Size ~120 GB
Photo-z's PDFs Total Size ~40 GB

Data Summary

The sky coverage of the J-PLUS DR1 is shown as red in Figure 1. The total non-overlapped and non-masked area is ~900 deg2 with around 9 million sources at r < 21.

DR1 Footprint

Figure 1. Footprint of the pointings observed in this DR1

In Figure 2 we show the distribution of values of FWHM and axis ratio of the PSF of all the r band coadded images. The median value of 1.13" corresponds to ~2pixels, given the plate scale and pixel size.

FWHM distribution of the PSF

Figure 2. DR1 Distribution of FWHM and axis ratio of the PSF in the reference r SDSS photometric band.

Figure 3 shows the distribution of limiting magnitudes (3", 3σ). The vertical dotted lines marks the target limiting magnitude of the survey. The presence of secondary peaks is due to a change in the survey strategy (see Section Survey Strategy for more details).

DR1 limiting magnitude distribution

Figure 3. DR1 limiting magnitude distribution (3", 3σ). Vertical lines are the current target limiting magnitudes.

Science Pieces

A colour image of the J-PLUS field 01488 is presented in figure 1. A great variety of astronomical sources are placed in the 2 deg2 FoV of T80Cam@JAST80: main sequence stars, white dwarfs (WD), galaxies, distant QSOs, minor bodies (MB) of the Solar System, etc. In figure 2 a collection of J-PLUS photo-spectra with 12 bands is presented, including the spectroscopic counterpart from SDSS.
Colour image of the J-PLUS  field 01488

Figure 1. Colour image of the J-PLUS field 01488.

J-PLUS photo-spectra with 12 bands of the sources marked in figure 1

Figure 2. J-PLUS photo-spectra with 12 bands of the sources marked in figure 1