Download Meade Image Processing Specifications

80
AUTOSTAR CCD PHOTOMETRY
Slope = 1 – 1 / γ)
(1 – 1 / γ) = [Δ((R – I) – (r– i)o)) / Δ(R – I)]
Δ((R – I) – (r– i)o)) / Δ(R – I) = –0.3200/1.2000
(1 – 1 / γ) = –0.2667
γ = 1 / (1 – 0.2667)
γ = 0.7895
γ is (R – I) Color Coefficient
Y-Intercept when MX = 0 is ζri / γ
Y-Intercept = ζri / γ
ζri = γ ∗ Y–Intercept
ζri = 0.6860 * 0.7895 = 0.5416
ζri = 0.5416
ζri is (R – I) Zero Point
Determining ε and ζv
Plotting (V – vo) versus (B – V) produces the slope which is ε and
the Y–intercept ζv.
Table E-10 lists the data and Figure E-6 shows a plot of the data.
The equations are in the form of an equation for a straight line:
(V – vo) = ε * (B – V) + ζv
Table E-10. (V – vo) versus ε * (B – V) Data.
(V – vo)
22.1227
22.0211
21.9475
21.9084
21.9054
21.9832
21.9595
21.9493
(B – V)
–0.0800
1.3700
0.7840
0.4570
0.5520
0.4480
0.5800
1.0600