Process overview – as a system of equations #1
See Lightcurves at
Chap. 5 for variable
definitions
PhotoRed
Extract target
magnitudes
Reduce - Reference
-Transforms
-Color index
Transforms
Transforms
CI = (ci - k’*X) + ZP
Δ( V – R ) = Δ( v – r ) - k’*X + ZP
Δ( M – m ) = Tv * CI + ZP – k’*X
Lightcurves Eq. 5.5 and 5.6
Process overview – as a system of equations #2
PhotoRed
Reduce - Reference
-Transforms
-Color index
-Extinction
First-Order All
Sky
k’ = ( vhigh - vlow ) / ( Xhigh – Xlow )
Lightcurves Eq. 5.8
Process overview – as a system of equations #3
MPO Canopus
Extract target
magnitudes
Color Index
(Comps/Target)
PhotoRed
import
Reduce – Target field
-Color index
-Extinction
First Order
Comps
Transforms
CI = ((( m1 - k’1X) – (m2 – k’2X)) * TCI) + ZPCI
Lightcurves Eq. 5.9
Process overview – as a system of equations #4
PhotoRed
Reduce – Target field
-Color index
-Extinction
Convert target field
to standard
magnitudes
First Order
Comps
Comps
Standard
Mags
Color Index
(Comps/Target)
Transforms
M = m – X*k’ + (Tm*CI) + ZP
Lightcurves Eq. 5.11 without
second order extinction factor
Process overview – as a system of equations #5
PhotoRed
Reduce – Target field
-Color index
-Extinction
Convert target field
to standard
magnitudes
Transforms
Target
Standard
Mags
Color Index
(Comps/Target)
ΔM = (mo – mc ) + T*(CIo - CIc)
Lightcurves Eq. 5.3, see id. at p. 68
Comps
Standard
Mags