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How to mosaic subarray data
To mosaic IRAC subarray data, the BCDs which are image cubes of 64 frames
need to be transformed into two-dimensional images.
MOPEX can then be run to make a final mosaic. This process is described more
explicitly in this memo. An IDL
procedure irac_subcube_collapse.pro
to collapse the 3D subarray data cube to a two-dimensional image is
available. In general, the two-dimensional versions of subarray BCDs will not
need outlier rejection as that is done through suitable averaging of the 64
frames in each cube. Here is a template namelist
mosaic_subarray_basic.nl for the SSC
mosaicker that mosaics without outlier rejection.
An example of using the IDL procedure and template name list to make a
small subarray mosaic (channel 1 image of Sgr A* from AORid 12074752, pid 3677,
PI S. Stolovy). The three panels are the mosaic, coverage map and uncertainty
image, from left to right.
This software is not considered part of the pipeline and no
installation support from the SSC should be expected. We are however very
interested in your feedback in order to improve or replace the algorithm
and are glad to work with you in test cases and analysis. Please send
your comments to help@spitzer.caltech.edu.
Updated 16 May 07
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