The Optical Gravitational Lensing Experiment. Final Reductions of the OGLE-III Data

TL;DR

This paper details the final data reduction and calibration methods for the OGLE-III survey, which provides extensive, long-term photometric data of the Magellanic Clouds and Galactic regions, crucial for astrophysical research.

Contribution

It introduces the data reduction and calibration techniques for OGLE-III, extending the photometric coverage and providing a comprehensive data set for astronomical studies.

Findings

Finalized photometric reductions and calibrations for OGLE-III data.

Astrometric reduction methods are described.

The dataset covers over 16 years of observations of key Galactic regions.

Abstract

We describe methods applied to the final photometric reductions and calibrations to the standard system of the images collected during the third phase of the Optical Gravitational Lensing Experiment survey - OGLE-III. Astrometric reduction methods are also presented. The OGLE-III data constitute a unique data set covering the Magellanic Clouds, Galactic bulge and Galactic disk fields monitored regularly every clear night since 2001 and being significant extension and continuation of the earlier OGLE observations. With the earlier OGLE-II and OGLE-I photometry some of the observed fields have now 16-year long photometric coverage.