iraf.net

Hi,Every time I run mscred.xtcoeff it returns a floating-point error (divide by zero). The other parts of the mscred package like ccdproc and mscdisplay are perfectly happy with these files, so there's no obvious error in the input files.I haven't found any way to make this divide-by-zero go away; it happens no matter what or how I call xtcoeff (with masks or without, specifying a list of files or a filename, trimmed files or raw files, bias subtracted or not, etc).-Jonathan-----------------------------------------Sample Output:[code:1:7e56f5b662]mscred> = mscred.version[/code:1:7e56f5b662]
[quote:7e56f5b662] V4.8: December 30, 2003
[/quote:7e56f5b662]
[code:1:7e56f5b662]mscred> unlearn xtcoeff[/code:1:7e56f5b662]
[code:1:7e56f5b662]mscred> xtcoeff @_ixt1 xtcor masks=@_mxt1 victim="im1,im2" source="im2,im1" smin=500 smax=30000 [/code:1:7e56f5b662]
[quote:7e56f5b662] # XTCOEFF: NOAO/IRAF V2.14EXPORT jstott@jstott.local Thu 13:55:02 07-Aug-2008
# Images Victim Bkg Source Bkg Victim Mask
# a0003 Line median Line median Ma0003
# a0004 Line median Line median Ma0004
# a0005 Line median Line median Ma0005
# a0006 Line median Line median Ma0006
# a0007 Line median Line median Ma0007
# a0008 Line median Line median Ma0008
# a0009 Line median Line median Ma0009
# a0010 Line median Line median Ma0010
# a0011 Line median Line median Ma0011
# a0012 Line median Line median Ma0012
# a0013 Line median Line median Ma0013ERROR: floating point divide by zero
[/quote:7e56f5b662]

Hello Jonathan,I am not aware of any known problems and your information does inidicate a source for the problem. So the only way I can help is to reproduce your problem. If you'd like I could login remotely. Or, provided the data set is not too large you could package up an example (parameters, data, and any other information that might be of use) and put it on the anonymous ftp site at iraf.noao.edu/pub. Drop me an email regarding these options (valdes@noao.edu).Yours,
Frank Valdes

Hi

I am trying to generate a crosstalk file for the new Mosaic 3.0 ( can't find any instrument file or crosstalk file in NOAO site for Mosaic 3.0 ) . I am getting the exact same error massage.
I can generate a corsstalkfile with a single image . but give the following massage when I input a list of images .


ERROR: floating point divide by zero


# XTCOEFF: NOAO/IRAF V2.16.1 sandanuwan@sandanuwans-MacBook-Pro.local Thu 01:40:35 16-Feb-2017
# Images Victim Bkg Source Bkg Victim Mask
# A1569_1r.fits Line median Line median
# A1569_2r.fits Line median Line median
# A1569_3r.fits Line median Line median
# A1569_4r.fits Line median Line median
# A1569_5r.fits Line median Line median
# A1569_6r.fits Line median Line median
# A2063_10r.fits Line median Line median
# A2063_1r.fits Line median Line median
# A2063_2r.fits Line median Line median
# A2063_3r.fits Line median Line median
# A2063_4r.fits Line median Line median
# A2063_5r.fits Line median Line median
# A2063_6r.fits Line median Line median
# A2063_7r.fits Line median Line median
# A2063_8r.fits Line median Line median
# A2063_9r.fits Line median Line median
# A426_1r.fits Line median Line median
# A426_2r.fits Line median Line median
# A426_3r.fits Line median Line median
# A426_4r.fits Line median Line median
# A426_5r.fits Line median Line median
# A496_10r.fits Line median Line median
# A496_1r.fits Line median Line median
# A496_2r.fits Line median Line median
# A496_3r.fits Line median Line median
# A496_4r.fits Line median Line median
# A496_5r.fits Line median Line median
# A496_6r.fits Line median Line median
# A496_7r.fits Line median Line median
# A496_8r.fits Line median Line median
# A496_9r.fits Line median Line median
# A576_1r.fits Line median Line median
# A576_2r.fits Line median Line median
# A576_3r.fits Line median Line median
# A576_5r.fits Line median Line median
# A57_4r.fits Line median Line median
# A757_1r.fits Line median Line median
# A757_2r.fits Line median Line median
# A757_3r.fits Line median Line median
# A757_4r.fits Line median Line median
# A757_5r.fits Line median Line median

ERROR: floating point divide by zero

Any help with this will be appreciated . Thanks .