For my final year astrophysics course I have to do a Bsci project on measuring variable stars. So far this site has proven invaluable with it's star index, but now I find myself at a bit of a loss. The manner of my observations is fairly limited, we will only have about four observations, with no set spacing between each. The observations themselves can be up to about 6 hours, so what I've been looking for is a few variable stars with a period of about 0.05 to 0.2. I was wondering if someone could reccomend some good stars which will yeild visible oscillations in with that kind of period? I'm located in London, England. I've got a few listed but I'm not sure if they'll be bright/vary enough to be any good.
Lastly, the range of magnitudes given in the VSX; does that indicate what magnitudes the stars with given periods oscillate between?