[vsnet-chat 5879] Re: GSC vs Tyc2

[Seiichi Yoshida <comet@aerith.net>]

Dear Taichi Kato,

[vsnet-chat 5854]:
>    Tycho-2 is the better selection for wide-field photometry.  Yoshida-san
> implemented a function to use other catalogs especially for narrow-field
> imaging, which will not contain a sufficient number of Tycho-2 stars.
> I have proposed to Yoshida-san to use a well-calibrated photometric sequence
> (such as the one compiled by B. Skiff), but this function is probably
> left for future implementation.

It has been already implemented. There are two ways.

One way is to creata a list of photometry stars in the Astrometrica
Other(ASCII) format by hand. The PIXY System 2 can read it. But note
that the LONEOS Photometry File at:
  http://ftp.lowell.edu/pub/bas/starcats/loneos.phot 
is also supported, so you do not need to convert it.

Another way is described at:

  Manual Astrometry/Photometry
  http://vsnet.aerith.net/misao/pixy/tutorial/manual.html

Best regards,

--
Seiichi Yoshida
comet@aerith.net
http://vsnet.aerith.net/

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