Specifications

72 AUTOSTAR CCD PHOTOMETRY
Table E-4. Equations and Extinction Values.
Equation Extinction from Appx. D
(r–i)
o
= (r–i) – k'
ri
* X k'
ri
= –0.5490
(v–i)
o
= (v– i) – k'
vi
* X k'
vi
= –0.154
(v–r)
o
= (v – r) – k'
vr
* X k'
vr
= –0.113
V
o
= v – k'
v
* X k'
v
= 0.436
(b–v)
o
= (b – v) – k'
bv
* X k'
bv
= –0.305
Where:
(r–i)
o
= Extra–Atmospheric (r–i) Magnitude
(v–i)
o
= Extra–Atmospheric (v–i) Magnitude
(v–r)
o
= Extra–Atmospheric (v–r) Magnitude
v
o
= Extra–Atmospheric v Magnitude
(b–v)
o
= Extra–Atmospheric (b–v) Magnitude
k'
ri
= 1st Order (R – I) Extinction Coefficient
k'
v
= 1st Order V Extinction Coefficient
k'
vi
= 1st Order (V – I) Extinction Coefficient
k'
vr
= 1st Order (V – R) Extinction Coefficient
k'
bv
= 1st Order (B – V) Extinction Coefficient
Standard Star Magnitudes
Table E-5 lists the standard star magnitudes.
Table E-5. Standard Star Magnitude Data.
Star ID V–I V–R R–I V B–V
M67-081 –0.068 –0.040 –0.028 10.024 –0.080
M67-108 1.351 0.707 0.644 9.711 1.370
M67-117 0.904 0.466 0.438 12.625 0.784
M67-124 0.558 0.280 0.278 12.119 0.457
M67-127 0.650 0.322 0.328 12.776 0.552
M67-130 0.575 0.283 0.282 12.894 0.448
M67-134 0.659 0.334 0.325 12.262 0.580
M67-135 1.055 0.556 0.499 11.445 1.060