Specifications

AUTOSTAR CCD PHOTOMETRY 77
Determining β and ζ
vr
A plot of ((V – R) – (v – r)
o
) versus (V – R) has the slope
(1 – 1 / β) and intercept ζ
vr
/ β, from which the values for β and
ζ
vr
can be calculated. The slope (1 – 1 / β) has a value near zero
and can be determined more accurately than the simple slope β.
Table E-8 lists the data and Figure E-4 shows a plot of the data.
The equations are in the form of an equation for a straight line:
((V–R) – (v–r)
o
) = (1–1/β) * (V – R) + ζ
vr
/β
Table E-8. ((V – R) – (v – r)
o
) versus (V – R) Data.
(V–R) – (v – r)
0
(V – R)
0.0556 -0.0400
0.0624 0.7070
0.0768 0.4660
0.1120 0.2800
0.0407 0.3220
0.1114 0.2830
0.0676 0.3340
0.0876 0.5560