Two-site CCD observations and spectroscopy of HD 207331: A new δ Scuti variable in Cygnus

Abstract

The results of an observational campaign on the new δ Scuti pulsator HD 207331 are reported. The star was observed photometrically from August 26 to September 2, 2009 from the Observatorio San Pedro Mártir (0.84-m telescope, Mexico) and the Observatorio del Teide (0.80-m telescope, Spain). An overall run of 53.8 h of useful data was collected from the two sites. Four oscillation frequencies for HD 207331 have been found above a 99% confidence level. These results confirm the multiperiodic pulsation nature of the star suggested in previous observations with sparse data. Spectroscopic observations carried out in 2009 allowed us to derive its spectral type and luminosity class as well as to estimate its rotation rate. A simple comparison with models is performed.

Mt. Suhora M dwarf survey – Detection of eight short-period variable stars

“…We conducted spectroscopic observations at the 2.12 m telescope of the San Pedro Mártir Observatory in Baja California, Mexico during August 30, 2010 (UT). We employed the same equipment as in Fox Machado et al (2010). In particular, we used the Boller & Chivens spectrograph installed in the Cassegrain focus of the telescope.…”