problem with REIDENTIFY - no features found

ovince wrote on Jun 23, 2017

Hi All,

I am learning spectral reduction, calibration etc., so I started with tutorial described in ccd2.ps and spectra.ps. All went fine but now I have problem to reidentify features in 1D spectrum using a reference one. This is the actual output message using the parameters from the tutorial

kpnoslit> reidentify sp0027.ms sp0018.ms coord=linelists$thorium.dat v+ inter+

REIDENTIFY: NOAO/IRAF V2.16 ovince@oliver-pc.aob.rs Fri 16:38:12 23-Jun-2017

Reference image = sp0027.ms, New image = sp0018.ms, Refit = yes

Image Data Found Fit Pix Shift User Shift Z Shift RMS

sp0018.ms - Ap 1 0/19 0/0 0. 0. 0. INDEF

I also twisted the task parameters but the output is the same.

I have also tried to do the exercise described in APPENDIX B of the spect.ps tutorial that is to correct distortions in 2D spectra but at the point where I use REIDENTIFY I get the same output.

Thank you in advance for help.

Oliver

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Francisco Valdes wrote on Jul 06, 2017

Hello Oliver,

The problem must be data dependent. I can help you if you send me the two spectral files, the identify database (which is in the database subdirectory) and a listing of the parameters from "dpar reidentify". I expect the files are small so you can try to attach them to an email to valdes@noao.edu. Or you can transfer them to the anonymous ftp account at iraf.noao.edu (subdirectory pub) and let me know you transferred them.

I will be gone for the next couple of weeks but I look at your problem.

Yours,

Frank

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ovince wrote on Jul 13, 2017

Thank you Frank for the reply.

Several days ago I have solved the problem by reinstalling IRAF. I used to have IRAF installed from the Mageia repository and REINDENTIFY failed every time. After reinstallation it works fine.

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Last post on Jul 13, 2017