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Knowledgebase : Data Analysis and Tools > MOPEX and APEX
Mac OS 10.10 sees that a PowerPC executable is bundled in the MOPEX package and prevents the package from being run by clicking on the Application in a Finder window or the dock. You can still launch MOPEX from the command line using: /Applications...
The chances are that it's neither of the above. Most likely the overall gradient in the mosaic image comes from the gradients in the input images, which were not properly flat-fielded. This is sometimes seen in MIPS-24 images. Perl script flatfield.pl, in...
Check the uncertainty images - they could be overestimated.
There are no restrictions on the mosaic pixel size. If the mosaic pixel size is so small that you don't have enough computer memory to coadd all the interpolated images at once, you should split the mosaic into several tiles. In order to do so, a suggeste...
The projection used here is exact, it involves no approximations. The only requirement here is that the final mosaic can not span more than one hemisphere.
Yes. First you should produce a mosaic with the corresponding uncertainty image. Then you run apex_1frame.pl (APEX Single Frame in the GUI) setting INPUT_IMAGE_FILE = <mosaic_image_file_name> and SIGMA_IMAGE_FILE = <mosaic_uncertainty_image_file_...
There are 4 interpolation methods available in MOPEX: DEFAULT (1), DRIZZLE (2), GRID (3), and CUBIC (4). GRID should be used when a quick-look mosaic is needed. It can also be used for background matching (overlap.pl). The gain in speed is up to 10 tim...
This is possible with the APEX "User List" flows. See the MOPEX User's Guide for more information.
The command-line version of MOPEX is distributed with the GUI - you should download the GUI and follow the installation instructions on the MOPEX Download page. Note that the environment variable file for MOPEX has changed from mopex.csh in previous versi...
Here is an example FIF.tbl file, which is by default placed in your output directory by the MOPEX module Fiducial Image Frame. ******************************************************************************** \char comment = Output from fiducial_image_...
The pixel size can be set directly using the following keywords in the namelist, or in the Initial Settings module > General Options in the GUI: MOSAIC_PIXEL_SIZE_X = -0.0003 MOSAIC_PIXEL_SIZE_Y = 0.0003 MOSAIC_PIXEL_SIZE_X is negative to follow th...
The slowest step is image interpolation. On a 500 MHz Sunblade with 512 MB of memory, it takes ~20s to process a 256x256 image.
The way to avoid doing passive deblending is to remove the deblend_size and deblend_id columns. To do so on the command line, set the following in the namelist: run_select_detect = 1 and add the list of columns to copy: select_detect_columns = "srci...
1) Run Mosaic with only the Fiducial Image Frame module included in the flow (set run_fiducial_image_frame = 1 if using the command line) to create a Fiducial Image Frame table that includes all of the images in the entire input list. 2) Edit the resu...
No, you don't have to redo mosaicking, especially if outlier rejection is used as part of mosaicking, since APEX does not do outlier rejection. APEX can use the tiles created by Mosaic and saved in the coadd directory (COADDER_DIR). If you are using the G...
Yes. If a subdirectory name is specified as a full path, it is not treated as a subdirectory of OUTPUT_DIR and the name is used as specified. All you have to do is specify MEDFILTER_DIR to point to the location where the background-subtracted images creat...
I'm getting the following error message when I run mosaic.pl: Pipeline Module MOSAIC_COADD Version 2.5 Processing time Tue Jan 20 18:11:26 2004 nmings 10 Error in allocating memory for Coverage Image for Tile 0 mosaic_coadd Error Message 0x0071: M...
Some Linux users have seen the following error message when trying to start MOPEX: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. The MOPEX GUI startup se...
The SSC only supports the command-line version of MOPEX on the following platforms: Solaris 10+, Mac OSX 10.3+ and Linux RedHat. If you are running a different platform or flavor of Linux then you are probably experiencing Perl library linking problems (a...
Due to Mac OSX 10.7 (Lion)'s official roll-out being very recent, it is not among the operating systems currently supported for MOPEX. We hope to support it in the near future. Observers attempting to use MOPEX on Lion will get a "PowerPC applications...
The error message: Perl system() return code = 6 sourcestimate ran with signal 6 System Exit Code ( sourcestimate): 6 usually means that you an out of RAM because of big blends of detections in the detection table. The module Source Estimate perf...
The command-line and GUI versions of MOPEX (including APEX) are identical in terms of the results they produce. If you are a new user then we strongly recommend using the GUI, as it is more user-friendly and has enhanced, built-in help pages. If you are r...
Parameter Detection_Threshold is probably set too high in the Detect module. Try lowering it. If this doesn't help, check that your Min_Coverage parameter isn't higher than the actual coverage in your mosaic.
The Perl error is most likely a memory limit because you are trying to derive a PRF from too many stars x too many frames x too big a fitting area x too fine sampling. For example, if you have a big fitting area, you could reduce this by lowering PostStam...
Check the uncertainty images - they could be underestimated.
If you are using the GUI then all you need is a set of input images listed in a text file. If you are using the command line, you need a set of input images with their full path name listed in a text file, and you will also require a "namelist" - a fi...
As part of the closeout for the Spitzer cryogenic mission custody of Spitzer documentation was transferred from the Spitzer Science Center to the Infrared Science Archive (IRSA) in April of 2011. However some information needed to run the warm mission was...
Any images in the FITS format, but the following keywords are required: BITPIX, NAXIS, NAXIS1, NAXIS2, CRVAL1, CRVAL2, CRPIX1, CRPIX2, CTYPE1, CTYPE2. Either the CD matrix or CDELT1, CDELT2, CROTA2 keywords are also required.
There are 3 steps required to use the results of Box Outlier Rejection in your reduction: 1) add the Mosaic Box Outlier module to your processing flow (run_mosaic_box_outlier = 1); 2) in the Mosaic RMask module settings, click the check box for "Use Box O...
For Single Frame Outlier Rejection, the following should be included (set to 1 in the namelist): MedFilter (run_medfilter = 1) Detect RadHit (run_detect_radhit = 1) For Multiframe Temporal Outlier Rejection the following should be included (set to 1...