| Re: FITS to ascii spectra [message #67636] |
Thu, 20 August 2009 08:56 |
rupai
Messages: 3
Registered: August 2009
|
Junior Member |
|
|
On Aug 20, 1:04 am, pp <pp.pente...@gmail.com> wrote:
> 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
thanks for useful information...
--rupai
|
|
|
|
| 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
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
