[vsnet-chat 1161] Re: "V Magnitude" Experiment - 1998

[Taichi Kato <tkato>]

Re: "V Magnitude" Experiment - 1998

   I think the field of R Sct, which I suggested, is suitable in terms
of stars of different colors.  The most frequently used comparison stars
have color differences up to B-V=1.5.

     If the purpose of the experiment is solely aimed to the quantitative
estimates of the response of individual eyes, it would be nice to perform
the experiment under restricted conditions.  However, as many of observers
know, variable star observing is not always done under ideal conditions.
Moonlight and city-light interference, variable cloud coverage, twilight,
low altitude, and so on, affect observations.  If the experiment is to cover
these varieties of conditions, a field at low ecliptic lattitude would be
a better choice.  Discrimination of these "background" factors from personal
response is easy: each observer only has to observe the field repeatedly
under very different conditions.  An ensemble of single measurements, which
at the same time include both personal response factor and background
factors -- they may not be always independent, may be more difficult to
properly analyze statistaically.

Regards,
Taichi Kato

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp