HD 207331 a new $\delta$ Scuti star in the Cygnus field: discovery and follow-up observations

TL;DR

This paper reports the discovery of a new $\

Contribution

It presents the discovery and follow-up observations of a new $\

Findings

Detection of variability in HD 207331

Confirmation of multi-periodic pulsations

Identification of beating periods

Abstract

Preliminary results on the discovery and follow-up observations of a new $\delta$ Scuti pulsator in the Cygnus field are presented. The variability of the star HD 207331 was detected while testing a Str\"omgren spectrophotometer attached to the H.L. Johnson 1.5-m telescope at the San Pedro M\'artir observatory, M\'exico. CCD photometric data acquired soon after confirmed its variability. A few hours of $uvby$ differential photoelectric photometry during three nights revealed at least two beating periods. A two-site observational campaign carried out during one week in 2009 confirms the multi-periodic nature of this new $\delta$ Scuti pulsator.