[vsnet-chat 1156] Re: "V Magnitude" Experiment - 1998

[Taichi Kato <tkato>]

Re: "V Magnitude" Experiment - 1998

   Thanks to Lance Shaw, I have been able to obtain all the neceesary files
for the AAVSO V Magnitude Experiment 1998.

   The essence seems to be the calibration of the eye using a set of stars
having different colors, without a priori knowledge of the magnitude
information.

   It ssems to be the field of R Sct may be another ideal choice: the
field is located close to the equator, periodically affected by the moonlight,
able to be affected by the large air-mass, and observable by a wide variety
of instruments ranging from binoculars (or naked eyes) to low-power
telescopes.  Fortunately, well-used chart of R Sct has known to contain
large errors against photoelectric measurements.  Observers can safely
disregard all the magnitude specified by the chart, and report by steps
how the eye perceives the difference between comparisons and other stars
in the field.   What about this idea?

Regards,
Taichi Kato

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