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DMTN-036: jointcal: Simultaneous Astrometry & Photometry for thousands of Exposures with Large CCD Mosaics

Dataset ·
 [1];  [2];  [3]
  1. Dept. of Astronomy, University of Washington
  2. Sorbonne Université, Université Paris Cité, CNRS/IN2P3, LPNHE
  3. Department of Astrophysical Sciences, Princeton University
+ Show Author Affiliations

The jointcal package simultaneously optimizes the astrometric and photometric calibrations of a set of astronomical images. In principle and often in practice, this approach produces distortion and thoroughput models which are more precise than when fitted independently. This is especially true when the images are deeper than the astrometric reference catalogs. In the "Astromatic" software suite, this simultaneous astrometry functionality is fulfilled by "SCAMP". The code we describe here has similar aims, but follows a slightly different route. Jointcal is built on top of the the LSST Data Management software stack.

Research Organization:
NSF-DOE Vera C. Rubin Observatory
Sponsoring Organization:
U.S. National Science Foundation; U.S. Department of Energy Office of Science
DOE Contract Number:
AC02-76SF00515
OSTI ID:
2586685
Report Number(s):
Vera C. Rubin Observatory Data Management Technical Note DMTN-036
Country of Publication:
United States
Language:
English

References (7)

Über die Reduktion von photographischen Sternpositionen und Eigenbewegungen journal January 1959
Gaia Data Release 1 : Summary of the astrometric, photometric, and survey properties journal November 2016
An Improved Photometric Calibration of the Sloan Digital Sky Survey Imaging Data journal February 2008
The Pan-Starrs 1 Photometric Reference Ladder, Release 12.01 journal April 2013
Astrometric Calibration and Performance of the Dark Energy Camera journal May 2017
The Differentiation of Pseudo-Inverses and Nonlinear Least Squares Problems Whose Variables Separate journal April 1973
PSTN-019: The LSST Science Pipelines Software: Optical Survey Pipeline Reduction and Analysis Environment dataset January 2025

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS