Re: GSC 00279 00321 and papers in general

[jg <jg@jgws.freeisp.co.uk>]

James Bedient wrote:

> For example, your star looks like
> a delta Scuti, but the the V-I you give is 0.77, which pushes it to very late
> F, almost G type, according to Zombeck - and the book I have says DSCTs are
> A0-F5.

Arne gave me a ticking off the other day for saying I instead of Ic.  I
was a bit embarrassed actually, coz I shoulda known.  Now publishing is
a possibility, some things need stating formally.  I know there are Tech
Notes, with a nice online subject search engine for them, but maybe a
little intro and key could be put somewhere, a kind of "guide to
authors"???  TASS is, apparently a Johnsons/Cousins system using
Johnson's V and Cousins' I, this latter usually denoted Ic.  (Somebody
correct that immediately if it is wrong).  Johnson's I also exists, but
has problems due to its passband definement and the atmospheric opacity
thereat etc.  Dunno whether Johnson I is properly Ij or just I , but I
on its own is usually presumed Johnson.

TASS is V subscript capital J and I subscript capital C  (again,
corrections welcome).


People should get themselves a copy of the electronic GCVS 

ftp.sai.msu.su, /pub/groups/cluster/gcvs/

and links therefrom.

There is an actual key come reference readme file defining variablitiy
types there.

But, more importantly, you have the GCVS catalogue itself, and can do a
text search on it for a variability type and see what spectral classes
there actually are for that type, if known.  There's often a few
outliers in each class that haven't read the books with respect to
spectral class and other physical characteristics.  (Unfortunately the
GCVS quoted spectrum may be apocryphal in some cases).

Interestingly, the objects I managed to solve (one I'm very certain on)
from the TASS data, all fitted dSct, but they are all just a bit too red
for that too!  Not sure about the Taurus-Auriga Dark Cloud and what have
you in this part of the sky causing sufficient absorption to account for
this trend by "reddening" (deblueing)?

But there doesn't seem to be a(nother) class of "reddish" short period,
< 1 d, regular and smooth pulsators (????)

> Most projects like that include a section on
> how they like to be acknowledged.  Vizier's is very simple, ``This research
> has made use of the VizieR catalogue access tool, CDS, Strasbourg, France'' as
> is ADC's, "This research has made use of NASA's Astrophysics Data System
> Bibliographic Services."

TASS, albeit an informal and "non-official" grouping, _needs_ an
accepted official acknowledgement of this form _yesterday_.

 

Very nice post from Jim B, by the way ;)

Cheers

John G