[vsnet-chat 2514] (fwd) Re: [AAVSO-DIS] B-V to V-R

[Taichi Kato <tkato>]

Date: Fri, 07 Jan 2000 22:11:49 -0600
To: Brian Skiff <bas@lowell.edu>, aavso-discussion@physics.mcmaster.ca,
        vsnet-chat@kusastro.kyoto-u.ac.jp
From: Beka Lou Taylor <bekaloutaylor@email.com>
Subject: [vsnet-chat 0] Re: [AAVSO-DIS] B-V to V-R

Can someone tell me what this means?
email:<bekaloutaylor@email.com>

At 12:11 PM 1/6/00 -0700, Brian Skiff wrote:
>     A simple regression against colors of Landolt stars yields:
>
>(V-R) = 0.508(B-V) + 0.040
>
>or:  R = V - 0.508(B-V) - 0.040
>
>Note that the sign difference on the zero-point is opposite what Arne posted,
>which was my arithmetic error, not his.  This relation works quite well
>for stars bluer than B-V = 1.2.  More complex functional forms were derived
>by John Caldwell and published in the South African Astronomical OBservatory
>Circulars a few years ago.  These cover all the UBVRIJHK, uvby, and DDO
>colors with extended range in color space.
>
>\Brian
>
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>aavso-discussion@mailman.McMaster.CA
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>
>
>
Beka
-----------------------
bekaloutaylor@email.com

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