KiDS DR4 data access

The publicly released KiDS data products are stored in two archives: the ESO Science Archive and the Astro-WISE archive. The data products have been created using the Astro-WISE and THELI processing systems, aided by additional software for source detection (KIDSCAT/SExtractor), masking (Pulecenella) and photo-z derivation (BPZ). Subsequently, the data have been exported to obtain the format requested by ESO.
It is important to realize there are some differences between the data files that can be retrieved via ESO and via Astro-WISE, but that these differences are only between the meta-data (i.e. FITS headers).

ESO Science Archive

The science products (calibrated, stacked images, single-band source lists, and catalogs) stored in the ESO Science Archive can be easily accessed through the interfaces listed below. All ESO archive queries will automatically retrieve the updated DR4.1 catalogues and masks where relevant.

→ ESO Archive Science Portal
→ Programmatic access
→ ESO Catalog Interface^*

^* The KiDS DR4 catalog is listed as catalog version 3

Astro-WISE

The calibrated, stacked ugri images, weight frames, optical masks single-band source lists and the THELI r-band detection images can be easily accessed through the DBviewer, the main data query tool in Astro-WISE. It provides access to the data products and their metadata. The latter includes data lineage, i.e., the tree of data products and process configurations that went into creating it. Below we provide links to the DBviewer result pages of queries for KiDS-ESO-DR4 data products. These result pages list the available data products with columns providing different types of information, including links to Quality-WISE (provides inspection plots and quality info), links to data lineage information ("object view") and links to the FITS files. None of these ugri data products are affected by the bug fixed for DR4.1.

• ugri Coadds
• ugri Single-band masks
• ugri Single-band sourcelists
• r-band Detection images

Batch download

Batch download of most data products (the ugri Coadds, weight frames, single-band masks, single-band source lists, multi-band catalog, and 9-band masks), in the same format as available via the ESO Science archive (but stored on the Astro-WISE data servers), is possible using wget.
The r-band detection images and their weights can also be retrieved in the same way, but will have slightly different header information (pixel data is identical, however).
Download scripts for all data products using wget are linked below. For the multi-band catalog and masks two scripts are provided: an ‘update’ script to retrieve just the data fixed in DR4.1 (intended for those who obtained DR4 before April 16 2020); and a ‘complete set’ script that retrieves the complete data set.

• ugri Coadds
• ugri Coadd weights
• ugri Single-band masks
• ugri Single-band source lists
• r Detection images
• r Detection weight images
• Multi-band masks (complete set)
• Multi-band catalog (complete set)
• Multi-band masks (DR4.1 update)
• Multi-band catalog (DR4.1 update)

Synoptic table

Combining quality information and inspection plots with download links for individual data files, the synoptic table provides a comprehensive overview of and access to the data release.
→ KiDS-ESO-DR4 synoptic table