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Re: Combining rgb fits files [message #53292]

Fri, 06 April 2007 09:46

Christopher Thom
Messages: 66
Registered: October 2006

Member

Quoth Amanda:

> I have 3 seperate fits files in red, green and blue and I think I need
> to combine them before I can do anything with them. When I look at
> them individually, they seem blank. I tried using the rgb to tiff
> procedure in idl but its still mostly blank with a small bit of it
> white. I got the data from the Faulkes telescope and the star I want
> shows up in the jpeg image. I'm trying to get light curves of variable
> stars from fits files. I don't know what I can do with a tiff file
> even if it did show up properly. I'm still not very good at this stuff
> so any help would be appreciated.

In addition to the advice that others have suggested, if you are really
looking at fits files, then an easier way to do a quick-look is to
download and use ds9, the "standard" fits viewer used in astronomy. It is
far more flexible (and easier to use) than the "tv" commands in idl.

http://hea-www.harvard.edu/RD/ds9/

And if you are after light curves, I see no reason that you would combine
rgb (are they really rgb? Not UBV filters?) images before attempting the
photometry. What is your aim in combining the images?

cheers
chris

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[Message index]

		Re: Combining rgb fits files By: Christopher Thom on Fri, 06 April 2007 09:46
		Re: Combining rgb fits files By: David Fanning on Thu, 05 April 2007 08:32
		Re: Combining rgb fits files By: Paolo Grigis on Thu, 05 April 2007 06:41
		Re: Combining rgb fits files By: David Fanning on Thu, 05 April 2007 07:30

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