Spectroscopy of BL Cam - Observations

TL;DR

This paper presents spectroscopic observations of BL Cam, a pulsating SX Phoenicis variable star with a 56.3-minute period, confirming its high amplitude variability and pulsation characteristics.

Contribution

The study provides detailed spectroscopic data on BL Cam, enhancing understanding of its pulsation behavior and confirming its variability properties.

Findings

BL Cam exhibits high amplitude variability of 300-350 mmag.

The star has a confirmed pulsation period of 56.3 minutes.

Spectroscopic observations support previous photometric findings.

Abstract

The star BL Camelopardalis (GD 428, GSC 04067-00471, V=12.92, B=13.1), is a SX Phoenicis pulsating variable showing a high amplitude variability (300-350 mmag), with a very clear period of 56.3 min, that has being recently studied by Fauvaud et al. (2010). They show that the observed variability is due to a clear and single pulsation, as expected for these type of pulsators. It was discovered as a variable star on 1976 by Berg and Duthie (1977).