Specifications

66 AUTOSTAR CCD PHOTOMETRY
The slopes are then determined and are equated to the filter band's
extinction coefficient.
Summary of Extinction Determination
Δ i / Δ X = k'
i
Δ v / Δ X = k'
v
0.9000 / 1.5250 = 0.590 0.6400 / 1.4690 = 0.436
k'
i = 0.590
k'
v
= 0.436
k'
vi
= 0.436 – 0.590 k'
vr
= 0.436 – 0.549
k'
vi
= –0.154 k'
vr
= –0.113
Δ r
/
Δ X = k'
r
Δ b / Δ X = k'
b
0.0615 / 1.500 = 0.041 0.1880 / 1.1439 = 0.131
k'
r = 0.041
k'
b = 0.131
k'
ri = 0.041 – 0.590
k'b
v
= 0.131 – 0.436
k'
ri = –0.549
k'b
v
= –0.305
Extinction Coefficients
k'
vi
= –0.154 k'
vr
= –0.113
k'
ri
= –0.5.49 k'
bv
= –0.305
k'
v
= –0.436