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Re: read FITS header keyword using IDL Astronomy users's library [message #73355 is a reply to message #73210]

Mon, 01 November 2010 10:26

wlandsman
Messages: 743
Registered: June 2000

Senior Member

On Nov 1, 1:08 pm, polystethylene <polystethyl...@hotmail.com> wrote:
> On Nov 1, 4:47 pm, Truong Le <truong...@gmail.com> wrote:
>
>> All,
>
>> Does anyone know if one can use the IDL astronomy users's library to
>> obtain just the header
>> keyword (in other word, I want to check if a header keyword exist in
>> the FITS file)?
>
>> I checked the library but could really see any procedure that actually
>> does what I really wanted.
>
>> Thanks
>
> SXPAR will do this for you...
>
>
Yes, and here's a little function if you want it..

function fits_keyword_exist,file,keyword,exten=exten
;return 1 if specified keyword exists in FITS file header. Primary
header
;is searched unless EXTEN keyword is set.

hdr = headfits(file,exten=exten)
dum = sxpar(hdr,keyword,count=count)
return,count<1
end

IDL> print,fits_keyword_exist('test.fits','bitpix')
1

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[Message index]

		read FITS header keyword using IDL Astronomy users's library By: Truong Le on Mon, 01 November 2010 09:47
		Re: read FITS header keyword using IDL Astronomy users's library By: Jeremy Bailin on Tue, 02 November 2010 07:57
		Re: read FITS header keyword using IDL Astronomy users's library By: wlandsman on Mon, 01 November 2010 10:26
		Re: read FITS header keyword using IDL Astronomy users's library By: Truong Le on Mon, 01 November 2010 10:26
		Re: read FITS header keyword using IDL Astronomy users's library By: polystethylene on Mon, 01 November 2010 10:08

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