The Nainital-Cape survey is a dedicated ongoing survey programme to search and study the pulsational variability in chemically peculiar (CP) stars to understand their internal structure and evolution.
The main aim of this survey is to find new pulsating Ap and Am stars in Northern & Southern hemisphere and set-up a platform to perform their asteroseismic study.
The survey was conducted using high-speed photometry. The candidate stars were selected on the basis of Str"omgren photometric indices similar to those of known pulsating CP stars. More than 300 candidate pulsating CP stars were observed for the Nainital-Cape survey, making it one of the longest survey ever in terms of time span and sample size. Here, we announce the discovery of Delta Scuti type pulsations in Am star HD73045. Apart from this positive detection, we present the light curves, frequency spectra and the various astrophysical parameters of the 108 additional CP stars observed since the last reporting. We have also tabulated an up-to-date list of known roAp stars along with their basic physical parameters. We investigated the scintillation noise level by comparing the combined frequency spectra of the sample stars observed from ARIES and Sutherland around the same time period. Our analysis shows that the stability of sky at Sutherland is better than ARIES, hence remains one of the best site for detection of milli-magnitude (mmag) order light variations.