Re: GSC 748-1618

[Chris Lloyd <cl@astro1.bnsc.rl.ac.uk>]

I think I may have resolved this problem. The TASS data are continuously
variable which makes the star look a bit like another W UMa, however, if
we have been deceived and TASS has, by some quirk of fate just observed
the minima, then the period is probably close to an integer number of
days. I offer this solution which fits the TASS observations, but of
course I don't know about the other, 'constant', data. There are two
eclipses per cycle, and for the primary the V-I colour gets redder, but
for the secondary minimum it gets bluer, just as you'd expect. There may
be other solutions but see how this one goes...

JD_minI = 2452311.66 + 2.083xE

Cheers,

Chris