[vsnet-chat 1279] Re(X): H/T chart vs. VT mags...

["FIDRICH Robert (Fidusz)" <fidusz@zpok.hu>]

At 22:12 1998.09.04. -0700, Brian Skiff wrote:

>>magnitudes from reliable sources.  But suddenly now he was saying to
_ignore_ these sources and to use the uncorrected VT instead!  This can't
help but introduce systematic problems in the collected dataset.  <<

I think systematic "scatter/errors" can be easier handle than errors caused
by comparisons from various sources...

>>stars one still has standard V, and upcoming catalogues will show
standard V magnitudes for general surveys of faint stars, this seemed to me
to be a
>>short-sighted change of systems.  Soon enough (five years?) we will have
reliable magnitudes for all stars in the sky to faint limits (at least to
the limits of the GSC, perhaps even A1.0), and the raw Tycho-system data
will be forgotten.<<

It is OK, but until we will have these magnitudes, we shall use some
comparisons... This is why I'd prefer the VT magnitudes as primer source
for comparisons.


Robert Fidrich
HAA/VSS
fidusz@zpok.hu
http://vsnet.zpok.hu/albakor/fidusz

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