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Re: read FITS header keyword using IDL Astronomy users's library [message #73359 is a reply to message #73210] Mon, 01 November 2010 10:08 Go to previous message
polystethylene is currently offline  polystethylene
Messages: 28
Registered: February 2009
Junior Member
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...

i.e...

fits = READFITS('data',header)
result = SXPAR(header,'keyword',COUNT=A)

I think if you then do

print,COUNT

and zero is returned, the keyword isn't present...
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