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June 21, 2018 at 3:29 pm #2973
Hello, I’m attempting to reduce some GNIRS long slit spectra (10/mmLR_G5532 grating, central wavelength ~3.5 microns).
I’ve installed Geminiconda and progressed through a few initial reduction steps (nsheader, nsprepare, nsreduce, nsflats) without too much difficulty.
However, I’m stuck at nswavelength. I’m providing a calibration star spectrum as the input for wavelength calibration. nswavelength does not request an output spectrum, and then the following occurs:
Input GNIRS/NIRI lamp spectra: /Users/User/Desktop/data/Gemini/GNIRS/nN20160810S0263.fits
NSWAVELENGTH — Wed Jun 20 12:48:50 PDT 2018
NSWAVELENGTH: LS data detected. Calling nswhelper to process data.
NSWHELPER — Wed Jun 20 12:48:50 PDT 2018
Using input files:
Using output files:
NSAPPWAVE — Wed Jun 20 12:48:50 PDT 2018
NSAPPWAVE: Processing 1 extension(s) from 1 file(s).
Camera Grating Filter Prism FPMask Wave Delta Order Axis
Killing IRAF task `fxcopy’
Traceback (innermost last):
File “<CL script CL1>”, line 1, in <module>
File “<CL script gnirs.nswavelength>”, line 298, in nswavelength
[… skipping the iraf.nswhelper text to shorten this post… ]
File “<CL script gnirs.nsappwave>”, line 289, in nsappwave
iraf.fxcopy(Vars.inimg + ‘.fits’, Vars.outimg + ‘.fits’,group = ‘0’,new_file=yes,verbose=no)
IrafError: Error running IRAF task fxcopy
IRAF task terminated abnormally
ERROR (741, “Cannot open file (w/Users/User/Desktop/data/Gemini/GNIRS/nN20160810S0263.fits)”)
It appears that nswavelength is looking for an output file in the “w” directory, but this directory doesn’t exist. I tried to manually generate a “w” directory just to see if I could work around this error, but it still crashes with the same issue.
I’m using Gemini IRAF package 1.14, installed on a Mac: Yosemite 10.10.5. I installed the package using the instructions provided on the Gemini data reduction pages.
Any guidance would be greatly appreciated!
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