Changes between Version 24 and Version 25 of psphot_extended_source_fit

Timestamp:

Sep 10, 2013, 3:08:12 PM (13 years ago)

Author:

bills

Comment:

--

psphot_extended_source_fit

@@ -64 +64 @@
 
 === Radii ===
-If we compare the measured widths with the source sizes we see effects that are not understood.
 
 ==== disks ====
-The following plots compare the measured semi-major axis with the disk scale length. The plot on the left shows all pure disks while the plot on the
-right zooms in on the linear regime. We find that the measured width is a factor of 2 larger.
+The models for disk galaxies are parametrized by disk scale length. The psphot extended source model width is scaled to the half
+light radius. To convert from EXT_WIDTH_MAJ to scale length we must divide by 1.7.
+
+Here is a comparison of the measured width to model scale length for pure disk galaxies. 
 
 [[Image(disk_widths.jpg)]] [[Image(disk_widths_zoom.jpg)]]
+
+Plots of of the differences versus scale length and magnitude.
+[[Image(ddl_v_mag_sersic.jpg)]] [[Image(ddl_v_dl_sersic.jpg)]]
 
 ==== bulges ====