[vsnet-chat 3899] re Re: [vsnet-id 325] Info on a LMC star

[crawl@zoom.co.uk]

Taichi Kato wrote :

>Re: [vsnet-id 325] Info on a LMC star
>
>   Additional comment.
>
>   The nearby star (potentially used as a comparison star) is known to be
>a variable star by the ASAS survey.  (I'm not certain about the listed CD/CPD
>identifications).

I dunno...

I've just looked at the online ASAS lightcurve for this object, and
although there seems to be quite a large amplitude of variation, a bright
hypergiant A star varying by nearly half a magnitude in the I band in about
a year sounds a bit weird to me, and the semi-cyclic nature of the changes
is suspiscious... ...then again I've no I band info on hypergiant stars
like rho Cas or similar for comparison.

BUT, ASAS stuff in the LMC has fallen down before due to being fooled by
duplicity induced variability caused by variant seeing etc at different
times, because of the crowded fields.

John

JG, UK

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