List a binary FITS or IRAF Spectrum in ASCII with
rvsao.
listspec
listspec prints pixel information for a spectrum image, selecting
what to print and the order to print it from the
columns parameter.
Possible columns are:
| n |
Aperture number of the spectrum (starting at one) |
| p |
Pixel number (starting at one) |
| w |
Wavelength of center of the pixel computed using the world
coordinate system defined in the image header |
| f |
Flux in this pixel in counts or photons, if photometrically
calibrated. |
| d |
change in wavelength across this pixel, useful for nonlinear
wavelength dispersions |
If logwav is yes,
the wavelength is output as log wavelength rather than linear
wavelength.
If renormalize is
yes, renormalize flux or counts to this number, mean if it's
negative, maximum if it's positive.
Formats
Formats for output numbers are set using C-style format codes in
numform,
pixform,
waveform, and
fluxform,
Limits
If lambda1is set,
start with the first pixel with a wavelength greater than or
equal to lambda1 in angstroms.
If lambda2is set,
stop with the last pixel with a wavelength less than or equal to
lambda2 in angstroms.
If pix1is set,
start at that pixel number (overidden by lambda1).
If pix2is set,
end with that pixel number (overidden by lambda2).
nsumis the number of
cross-dispersion pixels to sum, usually 1.
Output Spectrum Format
A blank (all zero) spectrum, with the object name
specobj and file name
specfile in the directory
specdiris created. It is
linear in wavelength, with a resolution of
pix_lambda Angstroms from
st_lambda to
end_lambda.
World coordinate system information is then
written to the header.
If verbose is yes, files
specified by logfiles
are opened and a header is written.
Output Spectrum
If nothing is set, the output ASCII spectrum is written line by line to
standard output. If heading
is yes, a one-line description is generated and output before
the specrum. If outfile
is yes, the list is written to an output file starting with the
root of the input file name and ending in .wav
Last updated June 19, 2019 by Jessica Mink
[rvsao]
[linespec]