A new and improved ephemeris for the hot subdwarf eclipsing binary SDSS J082053.53+000843.4

TL;DR

This paper presents a highly precise revised ephemeris and binary period for the HW Vir-type binary system SDSS J082053.53+000843.4, improving the accuracy of its orbital parameters significantly.

Contribution

It provides the first times of minima and a much more precise binary period, enhancing the understanding of this system's orbital characteristics.

Findings

Revised binary period: 0.0962404 days

First published times of minima

Period accuracy improved by four orders of magnitude

Abstract

SDSS J082053.53+000843.4 belongs to the HW Vir family of short period binary systems and was first identified by Geier in 2011. Whilst three subsequent papers have focused on the morphology of this system, little has been published on the system period and its constancy. Here we provide the first published times of minima together with a revised ephemeris and a binary period, 0.0962404(1)d, that is four orders of magnitude more precise than previous declared values.