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jirizak1 |
07/27/2018 10:50PM (Read 466 times)
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Status: offline
Registered: 07/27/2018
Posts: 1
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Hello IRAF users
I have run into a trouble with datas from HARPs. I have tried to run fxcor task on two spectras however it says no velocities will be computed (see the screen). I have used the sptable package that is recommended by ESO to use on HARPS data. From what I can see IRAF has a problem loading the wavelenght within the fxcor even though when I try the splot command it finds a way how to obtain it.
Do you have any idea what may be wrong and how to fix it?
https://imgur.com/a/yQS8VBT
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fitz |
08/01/2018 06:39PM
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Status: offline
Registered: 09/30/2005
Posts: 4040
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From your screenshots: The peak on top of a large hump in the CCF usually means the continuum normalization left some residual shape in the continuum, but there appear to be enough points to fit a peak. What I don't see though are any error messages or what you mean by "problem loading the wavelength". If you're using the SPTABLE package you can use the XONEDSPEC.SLIST task to see whether the spectral WCS is understood for each file. In FXCOR, you can use the 'l' (ell) command to view the logfile that will contain any error messages about missing header information (e.g. missing keywords that can be translated with the KEYWPARS pset).
If you still have problems, please post the logfile or the parameters you used.
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