3.16.2008
---------

This dir has results of tests we did on the g1c and g2c files Paul
provided (the first half in time on the gband image stacked together,
and then second half stacked image).

These results are from the RHS chip, because it was easier to run the
shapelets pipeline all the way through this one rapidly, and we wanted
to confirm them in both pipelines (though the plots shown below were
the ones made in imcat).  i also confirmed them separately on the
whole image field in imcat (since it's much faster).


--- Contents:

* - starmaghisto.ps: First, the stellar magnitude histo for all stars.
  note the peaking around mag = 25.5

* - e0difVSsmag1.ps: the difference in e0 (the horiz. component of
  ellipticity) for position-matched stars (around 400 of them, with
  stellarity above 0.9 and mag between 20 and 25) between the g2 and
  g1 images plotted against magnitude of the g1 image -- note the
  spread is always large, and grows towards fainter mags as we might
  expect.

- e0difVSsmag2.ps: same as above, plotted against magnitude of the g2
  image, for completeness (looks about the same).



- e1difVSsmag1.ps: the difference in e1 (the component of ellipticity
  at 45 degrees to the horiz.) for position-matched stars (around 400
  of them) between the g2 and g1 images plotted against magnitude of
  the g1 image -- as above, note the spread is always large, and grows
  towards fainter mags as we might expect.

- e1VSe0dif.ps: e1 dif vs. e0 dif for the matched stars.  quite large spreads, clearly.

  
- e1difVSsmag2.ps: same as above, plotted against magnitude of the g2
  image, for completeness (looks about the same).

- fwhm2vsfwhm1.ps: plotted this to compare another quantity -- again,
  quite a spread here.

* - mag2vsmag1.ps: the mags are very consistent until we get above about mag 24


- Then i plotted the individual and smoothed star ellipticities for
  the g1 (firsthalf), g2 (secondhalf) and the original combined file
  we had (allstars -- same as i gave in the talk), to compare (the
  latter are much more useful to see than the former).  these
  obviously drastically differ all of them from each other.  but they
  check out very closely with the sextractor results from the
  shapelets pipeline too (not shown here, for the moment).


    Here are the files:

* smoothed.starellips.allstars.ps
* smoothed.starellips.firsthalf.ps
* smoothed.starellips.secondhalf.ps
starellips.allstars.ps
starellips.firsthalf.ps
starellips.secondhalf.ps