Error No Images To Combine
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Index>Help Desk>Applications New Topic Post Reply zerocombine problem imcombine edmeades 10/24/2007 05:29PM(Read 14581 times) Newbie Status: offline Registered: 05/17/2007 Posts: 9 I have flatcombine iraf a user who is trying to use zerocombine, but it doesn't seem to want to open the images. When she or I run the zerocombine
Iraf Zerocombine
task, this is what we get: zerocombine List of zero level images to combine: ccd0009c1.fits,ccd0008c1.fits ERROR: No images to combine "pclip=pclip, grow=0)" line 47: ccdred$zerocombine.cl called as: `zerocombine ()' I tried fiddling with the ccdtype parameter, but that didn't help.Any ideas? Thanks again! Profile Email Quote fitz 10/24/2007
Iraf Imstat
05:29PM Admin Status: offline Registered: 09/30/2005 Posts: 3903 Setting the 'ccdtype' parameter to a null string (i.e double quotes like "") will force the input list to be processed as-is. Otherwise, things depend on the cctdype header keyword and/or the task parameter. Note that SETINSTRUMENT can be used to modify the image header keyword translations.-Mike Profile Email Quote edmeades 10/24/2007 05:29PM Newbie Status: offline Registered: 05/17/2007 Posts: 9 Okay, I tried that and I get this: ccdred> zerocombine List of zero level images to combine: ccd0008c1.fits,ccd0009c1.fits ERROR: segmentation violation "pclip=pclip, grow=0)" line 47: ccdred$zerocombine.cl called as: `zerocombine ()' I should be using a comma to separate the filenames, right? Profile Email Quote fitz 10/24/2007 05:29PM Admin Status: offline Registered: 09/30/2005 Posts: 3903 A comma to separate files is correct. Can other tasks like IMSTAT or IMHEAD open the images properly? Any chance of a permissio
PACKAGE = ccdred TASK = zerocombine input = @zeros.list List of zero level images to combine (output = Zero) Output zero level name (combine= average) Type ccdproc iraf of combine operation (reject = minmax) Type of rejection (ccdtype= zero) CCD image
Iraf Normalize Flat
type to combine (process= no) Process images before combining? (delete = no) Delete input images after combining? (clobber= no) Clobber imhead iraf existing output image? (scale = none) Image scaling (statsec= ) Image section for computing statistics (nlow = 0) minmax: Number of low pixels to reject (nhigh = 1) minmax: Number of high pixels http://iraf.net/forum/viewtopic.php?showtopic=138430&lastpost=true to reject (nkeep = 1) Minimum to keep (pos) or maximum to reject (neg) (mclip = yes) Use median in sigma clipping algorithms? (lsigma = 3.) Lower sigma clipping factor (hsigma = 3.) Upper sigma clipping factor (rdnoise= 0.) ccdclip: CCD readout noise (electrons) (gain = 1.) ccdclip: CCD gain (electrons/DN) (snoise = 0.) ccdclip: Sensitivity noise (fraction) (pclip = -0.5) pclip: Percentile clipping parameter (blank = http://astroweb.case.edu/lucy/MMTnov/iraf.html 0.) Value if there are no pixels I used hedit to set biassec in images hedit *.????.fits BIASSEC [2696:2708,1:256] I used ccdproc to zero correct all the images. noao.imred.ccdred.zerocombine I R A F Image Reduction and Analysis Facility PACKAGE = ccdred TASK = ccdproc images = *.fits List of CCD images to correct (output = ) List of output CCD images (ccdtype= ) CCD image type to correct (max_cac= 0) Maximum image caching memory (in Mbytes) (noproc = no) List processing steps only? (fixpix = no) Fix bad CCD lines and columns? (oversca= yes) Apply overscan strip correction? (trim = yes) Trim the image? (zerocor= yes) Apply zero level correction? (darkcor= no) Apply dark count correction? (flatcor= no) Apply flat field correction? (illumco= no) Apply illumination correction? (fringec= no) Apply fringe correction? (readcor= no) Convert zero level image to readout correction? (scancor= no) Convert flat field image to scan correction? (readaxi= line) Read out axis (column|line) (fixfile= ) File describing the bad lines and columns (biassec= image) Overscan strip image section (trimsec= ) Trim data section (zero = Zero) Zero level calibration image (dark = ) Dark count calibration image (flat = ) Flat field images (il
CCD images using various algorithms USAGE combine input output PARAMETERS input List of CCD images to combine. Images of a particular CCD image type may be selected with the parameter ccdtype with the remaining images ignored. output Output combined image or http://stsdas.stsci.edu/cgi-bin/gethelp.cgi?combine list of images. If the project parameter is no (the typical case for CCD acquisition) then there will be one output image or, if the subsets parameter is selected, one output image per subset. If the images consist of stacks then the project option allows combining each input stack into separate output images as given by the image error no list. plfile = "" (optional) Output pixel list file or list of files. If no name is given or the list ends prematurely then no file is produced. The pixel list file is a map of the number of pixels rejected or, equivalently, the total number of input images minus the number of pixels actually used. The file error no images name is also added to the output image header under the keyword BPM. sigma = "" (optional) Output sigma image or list of images. If no name is given or the list ends prematurely then no image is produced. The sigma is standard deviation, corrected for a finite population, of the input pixel values (excluding rejected pixels) about the output combined pixel values. ccdtype = "" CCD image type to combine. If specified only input images of the specified type are combined. See ccdtypes for the possible image types. amps = yes Combine images by amplifier? If yes then the input images are grouped by the amplifier parameter and each group combined into a separate output image. The amplifier identifier is appended to the output image name(s). See subsets for more on the amplifier parameter. subsets = no Combine images by subset parameter? If yes then the input images are grouped by subset parameter and each group combined into a separate output image. The subset identifier is appended to the output image name(s
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