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Re: FITS to ascii spectra [message #67646 is a reply to message #67636]

Wed, 19 August 2009 13:04

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On Aug 19, 4:42 pm, rupai <rupali...@gmail.com> wrote:
> is there any IDL procedure that can convert a 1D FITS spectra to an
> ascii text spectra (e.g. wspectext of IRAF ) ?

Download the idlastro library at

http://idlastro.gsfc.nasa.gov/

Then you can read the file using something like

fits_read,fits_file,data,header

How to interpret the array data that is returned by fits_read depends
on how the file was written. It may be necessary to read parameters
from the header (like initial wavelength and wavelength interval per
pixel).

Assuming you have the spectrum in an array called data2, then you can
make a text file with default formatting with just something like

openw,unit,txt_file,/get_lun
printf,unit,data2
free_lun,unit

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		Re: FITS to ascii spectra By: rupai on Thu, 20 August 2009 08:56
		Re: FITS to ascii spectra By: penteado on Wed, 19 August 2009 13:04

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