The Variable Stars from the OGLE-III Shallow Survey in the Large Magellanic Cloud

TL;DR

This paper reports the discovery and analysis of variable stars in the OGLE-III Shallow Survey of the Large Magellanic Cloud, extending period-luminosity relations and identifying new variable objects.

Contribution

It extends period-luminosity relations for Cepheids up to 134 days and identifies new binary systems, long-period variables, and miscellaneous variable candidates.

Findings

Extended Cepheid period-luminosity relation up to 134 days

Detected 82 new binary systems

Found 110 long-period variables not in previous catalogs

Abstract

We describe variable stars found in the data collected during the OGLE-III Shallow Survey covering the I-band magnitude range from 9.7 mag to 14.5 mag. The main result is the extension of period--luminosity relations for Cepheids up to 134 days. We also detected 82 binary systems and 110 long-period variables not present in the main OGLE catalogs. Additionally 558 objects were selected as candidates for miscellaneous variables.