The Optical Gravitational Lensing Experiment. OGLE-III Photometric Maps of the Galactic Disk Fields

TL;DR

The paper presents detailed, calibrated photometric and astrometric maps of 9 million stars in the Galactic disk from OGLE-III, supporting various astronomical studies including exoplanet research.

Contribution

It provides the first comprehensive, high-quality photometric maps of the Galactic disk fields observed during OGLE-III, covering over 7 square degrees and including data for 9 million stars.

Findings

High-precision VI photometry for 9 million stars

Astrometric data for Galactic disk fields

Color-magnitude diagrams illustrating stellar populations

Abstract

We present OGLE-III Photometric Maps of the Galactic disk fields observed during the OGLE-III campaigns for low luminosity transiting objects that led to the discovery of the first transiting exoplanets. The maps contain precise, calibrated VI photometry of about 9 million stars from 21 OGLE-III fields in the Galactic disk observed in the years 2002-2009 and covering more than 7 square degrees in the sky. Precise astrometry of these objects is also provided. We discuss quality of the data and present a few color-magnitude diagrams of the observed fields. All photometric data are available to the astronomical community from the OGLE Internet archive.