[vsnet-chat 1384] Re: comparison of Henden's sequence and USNO-based V mags

[Taichi Kato <tkato>]

Re: comparison of Henden's sequence and USNO-based V mags

(Re: [vsnet-chat 1376] comparison of GSPC and USNO-based V mags)

   I have drawn a PostScript figure showing V versus (V_Henden - V_exp)
(V_exp expected from USNO A1.0).

   http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/others/Henden/hendenoc.ps

   The linearlity of the USNO A1.0-based scale over the range V=10-20 looks
pretty good; no sign of increased scatter toward the fainter end.
However, there are a significant number of stars between V=16 and V=18
for which USNO A1.0 give more than 1 mag fainter than Henden's measurements.
Readers who can use USNO A2.0 please check whether this peculiality still
remains.

Regards,
Taichi Kato

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