ASCL.net

Astrophysics Source Code Library

Making codes discoverable since 1999

ASCL Code Record

[ascl:2012.002] NSCG: NOIRLab Source Catalog Generator

The NOIRLab Source Catalog Generator generates the NOIRLab Source Catalog (NSC), a catalog of all publicly available imagining data in the NOIRLab Astro Data Archive. The second data release (DR2) of the archive contains over 3.9 billion unique objects, 68 billion individual source measurements, covers 35,000 square degrees of the sky, has depths of 23rd magnitude in most broadband filters with 1-2% photometric precision, and astrometric accuracy of 7 mas. NSCG is written in Python and IDL. Three main steps generate the NSC: (1) Source Extractor (ascl:1010.064) is used to detect and measure sources in individual images; (2) astrometrics are calibrated with Gaia DR2 and photometric calibration using large public photometric catalogs such as Pan-STARRS1 and ATLAS-Refcat2; and, (3) measurements are clustered into unique objects, averaging photometric and morphological properties, and calculating proper motions and photometric variability indices.

Code site:
https://github.com/noaodatalab/noaosourcecatalog
Described in:
https://ui.adsabs.harvard.edu/abs/2018AJ....156..131N https://ui.adsabs.harvard.edu/abs/2020arXiv201108868N
Bibcode:
2020ascl.soft12002N

Views: 880

ascl:2012.002
Add this shield to your page
Copy the above HTML to add this shield to your code's website.