CreateVariance ZeroDivision error

[knordsieck]

Steve-

Here is my latest problem. I presume it is a header problem, since it is old data, but the bpP file generated has the GAIN and RDNOISE parameters set properly, so I don't immediately see:

IMRED
infile_list=['../raw/P201106130013.fits', '../raw/P201106130014.fits', '../raw/P201106130015.fits', '../raw/P201106130016.fits', '../raw/P201106130017.fits', '../raw/P201106130018.fits', '../raw/P201106130019.fits', '../raw/P201106130020.fits', '../raw/P201106130021.fits', '../raw/P201106130030.fits', '../raw/P201106130031.fits', '../raw/P201106130032.fits', '../raw/P201106130033.fits', '../raw/P201106130034.fits', '../raw/P201106130035.fits', '../raw/P201106130036.fits', '../raw/P201106130037.fits', '../raw/P201106130038.fits', '../raw/P201106130039.fits', '../raw/P201106130040.fits', '../raw/P201106130041.fits', '../raw/P201106130042.fits', '../raw/P201106130043.fits', '../raw/P201106130044.fits', '../raw/P201106130045.fits', '../raw/P201106130046.fits', '../raw/P201106130047.fits', '../raw/P201106130048.fits', '../raw/P201106130049.fits', '../raw/P201106130050.fits', '../raw/P201106130051.fits', '../raw/P201106130052.fits', '../raw/P201106130053.fits', '../raw/P201106130054.fits', '../raw/P201106130055.fits', '../raw/P201106130056.fits', '../raw/P201106130057.fits', '../raw/P201106130058.fits', '../raw/P201106130059.fits', '../raw/P201106130060.fits', '../raw/P201106130061.fits', '../raw/P201106130062.fits', '../raw/P201106130063.fits', '../raw/P201106130064.fits', '../raw/P201106130065.fits', '../raw/P201106130066.fits', '../raw/P201106130067.fits', '../raw/P201106130068.fits', '../raw/P201106130069.fits', '../raw/P201106130070.fits', '../raw/P201106130071.fits', '../raw/P201106130072.fits', '../raw/P201106130073.fits', '../raw/P201106130074.fits', '../raw/P201106130075.fits', '../raw/P201106130076.fits', '../raw/P201106130077.fits', '../raw/P201106130096.fits', '../raw/P201106130097.fits', '../raw/P201106130098.fits', '../raw/P201106130099.fits', '../raw/P201106130100.fits', '../raw/P201106130101.fits', '../raw/P201106130102.fits', '../raw/P201106130103.fits', '../raw/P201106130104.fits', '../raw/P201106130105.fits', '../raw/P201106130106.fits', '../raw/P201106130107.fits', '../raw/P201106130108.fits', '../raw/P201106130109.fits', '../raw/P201106130110.fits', '../raw/P201106130111.fits', '../raw/P201106130112.fits', '../raw/P201106130113.fits', '../raw/P201106130114.fits', '../raw/P201106130115.fits', '../raw/P201106130116.fits', '../raw/P201106130117.fits', '../raw/P201106130118.fits', '../raw/P201106130119.fits']
prodir=./
bpmfile=/d/carol/Synched/software/SALT/polsaltcopy/polsalt/data/bpm_rss_11.fits
gaindb=None cleanup=True

2016-06-20 21:11:26 MESSAGE ------------------------------------------
Starting imred

Pysalt Version: v0.5dev

 --------------------------------------------------
                     HDU Overscan Order  RMS  Niter
 --------------------------------------------------
   P201106130013.fits[1]   275.77   5    0.36  10
   P201106130013.fits[2]   277.69   5    0.39  10
   P201106130013.fits[3]   279.96   5    0.20  10
   P201106130013.fits[4]   278.27   5    0.28  10
   P201106130013.fits[5]   281.53   5    0.24  10
   P201106130013.fits[6]   286.58   5    0.28  10
   P201106130013.fits[7]   275.54   5    0.40  10
   P201106130013.fits[8]   277.49   5    0.31  10
   P201106130013.fits[9]   279.37   5    0.24  10
   P201106130013.fits[10]   277.86   5    0.35  10
   P201106130013.fits[11]   281.10   5    0.28  10
   P201106130013.fits[12]   286.02   5    0.26  10

2016-06-20 21:11:28 ERROR --------------------------------------------
float division by zero
Traceback (most recent call last):
File "/usr/users/brian/sal/brian/iraf/RSS/salt/pysalt/lib/saltsafelog.py", line 196, in logging
yield log
File "/d/carol/Synched/software/SALT/polsaltcopy/polsalt/imred.py", line 92, in imred
hdu = add_variance(hdu, badpixelstruct)
File "/d/carol/Synched/software/SALT/polsaltcopy/polsalt/imred.py", line 177, in add_variance
hdu=CreateVariance(struct[i], i, nextend+i)
File "/usr/users/brian/sal/brian/iraf/RSS/salt/pysalt/saltred/saltprepare.py", line 199, in CreateVariance
data=(data+(rdnoise/gain)**2)
ZeroDivisionError: float division by zero

2016-06-20 21:11:28 MESSAGE ------------------------------------------
imred aborted
P201106130013.zip

[knordsieck]

Aha! This is windowed data. There are 12 extensions, the first 6 being the bottom (O) beam and the next 6 being the top (E) beam. I will see if imred and correct_files can be made to do this without mucking with your deeper routines, otherwise I may be asking for your help.