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NIFS task NFEXTRACT

sergeco wrote on Jan 08, 2011

Hi,

Reducing NIFS data I'm having the following problem within the task NFEXTRACT. I'm using IRAF 2.14.1 and the latest version (1.10) of the GEMINI package.

ERROR: floating point invalid operation
"highcut=100000000.0,lowcut=-100000000.0,pixtype="double",verbose+)"
line 316: nifs$nfextract.cl
called as: `nfextract (inimages=tfbrsn@telluriclist, outprefix=x, diameter=0.5, fl_inter=yes, fl_zval=yes, z1=0., z2=10000., logfile=nifs.log)'

I looked into the code of the task and made some experiments. The corresponding line (316 including some of my editing) is :

improject(tmpcube,tmpimg,projaxis=l_dispaxis,average-,
highcut=100000000.0,lowcut=-100000000.0,pixtype="double",verbose+)

I can do imstat on tmpcube and the size is a multiple of 2880 bytes, therefore the data cube seems fine but it is perhaps something related to the header. I have in the past (2009) reduced NIFS data with the same configuration (Iraf and package version) without problems. Following the problem I got this time with these new data (from 2010) I checked again to apply nfextract to the 2009 data which works.

Therefore it looks like something has changed in the format of NIFS data and its subsequent reduction that makes improject crash. Do you have any idea what could be the problem there ?

Thanks in advance for your help,
Serge

Mike Fitzpatrick wrote on Jan 08, 2011

This is a GEMINI package task calling an STSDAS task, if you don't get a reply here then I'd suggest you contact either the Gemini HelpDesk (using their standard web interface) or the STScI Helpdesk (help@stsci.edu) for clarification. AFAIK this is not a known issue.

Last post on Jan 08, 2011