[vsnet-chat 5163] Re: About courios observation, big confusion

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

Re: [vsnet-chat 5158] About courios observation, big confusion

   Another point of this curious observation:

> fainter then  magMin 10.5 p of  HYAFH and brigther then 12.2 of GSC4900:329.
> If need I will send the images.
> 
> On the other hand, on images, the star appear of orange coulor and
> comparison with the near star
> GSC 4900:477 9.8/0.4 and GSC 4900:491 10.3/0.4, the different magnitude is
> well visible.

   But I wonder how the range of 10.0-10.5p was estimated (by the discoverer
Hoffmeister)?  These photographic magnitudes look too bright for this
red variable...?  Did Hoffmeister use compariosn stars in "old-scale"
visual magntudes in the BD catalog in estimating photograhpic magnitudes??

Regards,
Taichi Kato

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