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Changes between Version 1 and Version 2 of Stackphot_20100514


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Timestamp:
May 17, 2010, 4:55:38 PM (16 years ago)
Author:
eugene
Comment:

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  • Stackphot_20100514

    v1 v2  
    55server for people to investigate.
    66
    7 The data can be found at:  rsync://pikake.ifa.hawaii.edu/md04.stackphot/
     7The data can be found at: {{{rsync://pikake.ifa.hawaii.edu/md04.stackphot}}}
    88
    9 Download it with a command like: rsync -auv
    10 rsync://pikake.ifa.hawaii.edu/md04.stackphot/ md04.stackphot/
     9Download it with a command like:
     10{{{
     11rsync -auv rsync://pikake.ifa.hawaii.edu/md04.stackphot/ md04.stackphot/
     12}}}
    1113
    1214There are two sets of files in this directory:
    13  * MD04.skycell.079.stk.* : these are the inputs to the stackphot analysis
    14  * MD04.skycell.079.stkphot.* : these are the outputs from the
    15 stackphot analysis.
     15
     16* MD04.skycell.079.stk.* : these are the inputs to the stackphot analysis
     17* MD04.skycell.079.stkphot.* : these are the outputs from the stackphot analysis.
    1618
    1719The analysis was performed using the griz images from the current
    … …  
    102104the radii defined by SDSS.  The inner and outer radii in pixels are
    103105listed below:
    104 
    105 @RADIAL.ANNULAR.BINS.LOWER           F32     0.00 0.56 1.69 2.59 4.41
    106 7.51 11.58 18.58 28.55 45.50  70.51 110.53 172.49 269.52 420.51
    107 @RADIAL.ANNULAR.BINS.UPPER           F32     0.56 1.69 2.59 4.41 7.51
    108 11.58 18.58 28.55 45.50 70.51 110.53 172.49 269.52 420.51 652.50
     106{{{
     107@RADIAL.ANNULAR.BINS.LOWER           F32     0.00 0.56 1.69 2.59 4.41 7.51 11.58 18.58 28.55 45.50  70.51 110.53 172.49 269.52 420.51
     108@RADIAL.ANNULAR.BINS.UPPER           F32     0.56 1.69 2.59 4.41 7.51 11.58 18.58 28.55 45.50 70.51 110.53 172.49 269.52 420.51 652.50
     109}}}
    109110
    110111Some points and caveats:
    111112
    112113* unlike SDSS, we are currently using the Petrosian flux measured on a
    113 given image to determine R50 and R90 for that image (SDSS uses the
    114 r-band)
     114 given image to determine R50 and R90 for that image (SDSS uses the
     115 r-band)
    115116* the average object positions are used to measure the radial, not
    116 r-band specifically like SDSS
     117 r-band specifically like SDSS
    117118* we do not currently resample and recenter the source pixels to place
    118 the center at a pixel center (as photo does).  this should only be an
    119 important effect in the inner ~2 pixels if the image is nearly
    120 undersampled (which we clearly are not).
     119 the center at a pixel center (as photo does).  this should only be an
     120 important effect in the inner ~2 pixels if the image is nearly
     121 undersampled (which we clearly are not).
    121122* the zero points are not being carried into the stack correctly, so
    122 the photometry is NOT currently calibrated.  The data in the sample is
    123 from MD04, which overlaps SDSS, so it should be easy to calibrate from
    124 SDSS.
     123 the photometry is NOT currently calibrated.  The data in the sample is
     124 from MD04, which overlaps SDSS, so it should be easy to calibrate from
     125 SDSS.
    125126* the astrometric calibration is being applied to the output 'cmf'
    126 tables, but the WCS seems to be broken in the header
     127 tables, but the WCS seems to be broken in the header
    127128* there is a bit of work still needed to integrate the analysis into
    128 the IPP automatically.
     129 the IPP automatically.
    129130* non-linear model fits are still not being included in the analysis