[vsnet-alert 11253] re New flare star candidates

[kstars at Safe-mail.net]

The CMC14 r' and 2MASS J-Ks colours, r'-J = 3.00 and J-Ks = 0.85, are in fact just about fine for an M0 main sequence star.

I can't add up it seems, I originally got 11.24 - 8.24 = 2....

Sorry about that.

Absolute magnitude then would be about 9.8 ish, so with the ASAS3 V ~ 11.8 is that gives a distance modulus of about ~ 2, which gives about 25 parcsecs distance (_if_ I've added that one up properly).

And whilst looking to see if SIMBAD had any V measures I suddenly find I missed looking at one of the only three references coz I thought it was to another edition of Stephenson's S star catalogue but on checking find that it's actually a reference to a paper by another guy we likely couldn't have done without re objective prism spectra, MacConnell.

And the contradiction suddenly all melts away coz it isn't an S star, it's a red dwarf with a CaH line at the very adjacent wavelength of 639 nm (CaH = Calcium Hydride) as noted here specifically for CSS 1237 :-

http://cdsads.u-strasbg.fr/full/gif/1997BaltA...6..105M/0000108.000.html

in a paper that actually asks where are all the main sequence C and S stars are!  (And finds there aren't any of the latter, at least none found so far in 1997).

It's all there if ya just look a lot of the time.

Cheers

John