ProFit (version 1.3.3)

profitFlux2Mag: Convert between fluxes and magnitudes.

Description

Simple functions to concert between magnitudes and flux given a certain magnitude zero-point.

Usage

profitFlux2Mag(flux = 1, magzero = 0)
profitMag2Flux(mag = 0, magzero = 0)
profitFlux2SB(flux = 1, magzero = 0, pixscale = 1)
profitSB2Flux(SB = 0, magzero = 0, pixscale = 1)

Arguments

flux

Numeric scalar/vector; flux in ADUs given the magzero.

mag

Numeric scalar/vector; magnitude given the magzero.

magzero

Numeric scalar/vector; magnitude zero point. What this implies depends on the magnitude system being used (e.g. AB or Vega).

SB

Numeric scalar/vector; surface brightness in mag/asec^2.

pixscale

Numeric scalar/vector; the pixel scale, where pixscale=asec/pix (e.g. 0.4 for SDSS). If set to 1, then the output is in terms of pixels, otherwise it is in arcseconds.

Value

profitFlux2Mag

Returns the magnitude, where mag = -2.5 * log10(flux) + magzero)

profitMag2Flux

Returns the flux, where flux = 10^(-0.4 * (mag - magzero))

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Details

These functions are here to prevent silly mistakes, but the conversion is almost trivial.

Examples

# NOT RUN {
profitFlux2Mag(1e5, 30)
profitMag2Flux(17.5, 30)
# }