2 PTF_PhotCal ivo://irsa.ipac/PTF/Catalog/PTF_PhotCal NASA/IPAC Infrared Science Archive PTF Team 2025-08-26 IRSA Support Team irsasupport@ipac.caltech.edu The Palomar Transient Factory Photometric Calibrator Catalog v1.0 is a photometrically calibrated catalog of non-variable sources from the Palomar Transient Factory (PTF) observations. The catalog contains calibrated R_PTF-filter magnitudes for about 21 million sources brighter than magnitude 19, over an area of about 11233 deg^2. The magnitudes are provided in the PTF photometric system, and the color of a source is required in order to convert these magnitudes into other magnitude systems. The magnitudes in this catalog have typical accuracy of about 0.02 mag with respect to magnitudes from the Sloan Digital Sky Survey. The median repeatability of the catalog's magnitudes for stars between 15 and 16 mag, is about 0.01 mag, and it is better than 0.03 mag for 95% of the sources in this magnitude range. The main goal of this catalog is to provide reference magnitudes for photometric calibration of visible light observations. https://irsa.ipac.caltech.edu/data/PTF/gator_docs/PTF_colDescriptions.html Survey Research served-by IRSA TAP service 2 https://irsa.ipac.caltech.edu/SCS?table=ptfphotcalcat& 180 21167679 false 42.532500 -31.087161 0.01 2 To access this resource via TAP, issue ADQL queries on the table named ptfphotcalcat. https://irsa.ipac.caltech.edu/TAP 2 https://irsa.ipac.caltech.edu/cgi-bin/Gator/nph-dd?catalog=ptfphotcalcat Optical ptf The Palomar Transient Factory (PTF) sagecatmips24v2PTF Photometric Calibrator Catalog