|ChaRT vs. Real|
Just wondering how good ChaRT is
Just exactly how good is ChaRT?
I couldn't tell how good ChaRT simulation is by looking at both ChaRT simulation and real data images. So I took up the data products that Jennifer West produced and analyzed for the fun of it. Let me set aside the fact that I need to get a life than doing this for fun.
Anyway, first load up both simulated and real datasets onto IDL and create 2-D image arrays (histogram) in SKY_X and SKY_Y coordinates. I scaled the images so that the intensity ranges from 0 to 1 in both images. Here is the blinking animation of these two frames:
So they look alike. But how does that hold up statistically? Looking alike is one thing; mathematically identical is another. What we want is the latter, of course. So I ran some KS-type analysis in the accumulated PSF profile. For simplicity, I collapse the whole image onto SKY_X or SKY_Y axes and then ran the comparison of cumulative profiles (real and ChaRT). The results are shown below:
This page was last updated Dec 30, 2002 by Bish K. Ishibashi. To comment on it or the material presented here, send email to email@example.com.