FEROS DRS

giannicatanzaro wrote on Apr 09, 2015

hello guys

I downloaded a FEROS tarball with data like those ones:

r.FEROS.2006-06-20T04:16:45.241.1051.fits

r.FEROS.2006-06-20T04:16:45.241.1052.fits

r.FEROS.2006-06-20T04:16:45.241.1061.fits

r.FEROS.2006-06-20T04:16:45.241.1062.fits

r.FEROS.2006-06-20T04:16:45.241.1081.fits

r.FEROS.2006-06-20T04:16:45.241.1082.fits

does someone know how to read them with splot?

cheers

gianni

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Mike Fitzpatrick wrote on Apr 09, 2015

I'm not familiar with the data format for this instrument or exactly what problem you might be having. The SPTABLE external package (see the home page) can handle tabular spectral formats, if this is a multi-extension FITS file then you would need to specify the extension number when calling splot. Otherwise, on some Mac systems the ':' in the filename could possibly be seen as a path delimiter but that has been deprecated in recent versions of MacOS.

Exactly what problem do you see when you try to run SPLOT on the file?

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gmaravel wrote on Jun 16, 2015

Hi!

I think there is no problem to read the data with splot. I just tried that with some of my own data and it works simple as that:

splot r.FEROS.2006-06-20T04:16:45.241.1081.fits

or

splot r.FEROS.2006-06-20T04:16:45.241.1081.fits[0]

Now there are extensions only for the *1081/1082 files which correspond to the different orders of the spectrograph. Splot cannot displayed them if you just select an extension (eg r.FEROS.2006-06-20T04:16:45.241.1081.fits[1] - I do not know why).

I suppose that you are probably intereted in the final products (1d fully calibrated and merged spectra, see [1]) which are indicated as *1081 for the object fiber and *1082 for the sky fiber (if this mode was used)

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[1] https://www.eso.org/sci/facilities/lasilla/instruments/feros/tools/DRS/FileNameConventions.html

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Last post on Jun 16, 2015