Observing Delta Scuti stars is most important as their multi-frequency
spectrum of radial pulsations provide strong constraints on the physics of the
stars interior; so any new detection and observation of these stars is a
valuable contribution to asteroseismology. While performing uvby-beta
photoelectric photometry of some RR Lyrae stars acquired in 2005 at the
Observatorio Astronomico Nacional, Mexico, we also observed several standard
stars, HD115520 among them. After the reduction this star showed indications of
variability. In view of this, a new observing run was carried out in 2006
during which we were able to demonstrate its variability and its nature as a
Delta Scuti star. New observations in 2007 permitted us to determine its
periodic content with more accuracy. This, along with the uvby-beta
photoelectric photometry allowed us to deduce its physical characteristics and
pulsational modes.Comment: 6 pages. To be published in Journal of Physics: Conference Series.
Proc. of the workshop Helioseismology, Asteroseismology and MHD Connections
held in Gottingen, Germany, 20-24 August 200