Changes between Version 16 and Version 17 of fullforce_SAStest1

Timestamp:

Jan 31, 2014, 2:04:19 PM (12 years ago)

Author:

bills

Comment:

--

fullforce_SAStest1

@@ -122 +122 @@
 sersic model was the best.
 
-SDSS did not measure a sersic model so we compare the SDSS model magnitude r with our sersice magnitude.
+SDSS did not measure a sersic model so we compare the SDSS model magnitude r with our Sersic magnitude.
 Here is a scatter plot comparing the two magnitudes and a histogram of the difference.
 
 [[Image(dsermag_v_r.jpg)]] [[Image(dsermag.jpg)]]
 
-As expected, the measured sersic index for these galaxies is concentrated at low values. Interestingly the peak is
-less than 1 (exponential model). 
+As expected, the measured Sersic index for these galaxies is concentrated at low values. Interestingly the peak is
+less than 1 (where the Sersic model function is equivalent to an exponential model). 
 
 [[Image(sersic_index_exp.jpg)]]
 
  
+==== de Vaucouleurs Galaxies ====
+
+20030 of the 100513 objects matched to SDSS galaxies have devFrac_r = 1 indicating that the SDSS composite
+model was equal to their deV model. 9196 of these had psphotStack extended model fits. The dev model was the best fit for 2046, 4661 sersic, and surprisingly for 2489
+objects the exp model had the lowest chisq.
+
+===== devGalaxies dev model =====
+
+Here are plots of the difference between SDSS model fit major axis and magnitude and the psphot full force summary results
+for the devGalaxies.
+
+[[Image(ddevrad.jpg)]] [[Image(ddevmag.jpg)]] 
+
+And a scatter plot of the two differences.
+
+[[Image(ddevmag_v_ddevrad.jpg)]] 
+
+And the magnitude difference versus SDSS magnitude.
+
+[[Image(ddevmag_v_r.jpg)]]
+
+
+