SIGRATIO

Name

sigratio

Purpose

Compute the relative signal level between a set of spectra (1-d vectors).

Description

Calling Sequence

sigratio,stack,relsig,noise,REF=ref

Inputs

stack - an array of spectra [npts,nspec]

Optional Input Parameters

Keyword Input Parameters

BAD - Array of flags for each point in stack. 0=good, 1=bad. (default=0).
REF - If provided, the relative signal levels are measure relative to
this spectrum out of the stack. You can also provide an
external spectrum as a vector with npts.
RBAD - Bad value flags for the reference (only used if REF is a spectrum).
SCALE - range of pixels to use for scaling all spectra to each other.
The default is to use all pixels for scaling.

Outputs

relsig - Output array, NSPEC long, that has the relative signal levels.
noise - Output array, NSPEC long, that is the noise level in each spectrum
relative to the reference.

Keyword Output Parameters

Common Blocks

Side Effects

Restrictions

Procedure

Modification History

98/07/24 - Written by Marc W. Buie, Lowell Observatory
98/08/14, MWB, added REF spectrum support, RBAD keyword, and noise output.
98/09/10, MWB, cleanup to eliminate illegal floating point operations.