Changes between Version 5 and Version 6 of fullforce_SAStest1

Timestamp:

Jan 31, 2014, 11:36:54 AM (12 years ago)

Author:

bills

Comment:

--

fullforce_SAStest1

@@ -47 +47 @@
 than the cut for any band, fits were performed in all bands. In 3PI.PV2 extended model fits will not be performed in the region within 20 degrees latitude of the galactic plane with the limit increasing to 35 degrees near the galactic center.
 
-During the skycal processing a new data product is produced. The "cff file". Here are contained the measurements for each source that are to be
-used for forced photometry. Each source with an with a extended source fit is marked for galaxy fitting.
+During the skycal processing a new data product is produced. The "cff file". 
+Here are contained the measurements for each source that are to beused for forced photometry. 
+Each source with an with a extended source fit is marked for galaxy fitting
+and the parameters from the psphotStack model are given to be used as the starting point for the full force search.
+The model type chosen is the best of the three models Exponential (exp), de Vaucouleurs (dev), or sersic (ser).
 
 The inputs to each "full force run" are the cff file (one per skycell per filter) and the set of individual warps for each skycell. In this data set there were
@@ -54 +57 @@
 
 The full force processing consists of two parts. Running psphotFullForce on the individual warps followed by psphotFullForceSummary to generate the 
-final extended source measurements for each source. See [wiki:fullforce_algorithms] for details on the measurements and calculations.
+final extended source measurement for each source. See [wiki:fullforce_algorithms] for details on the measurements and calculations.
+
+=== Results ===
+
+Here we present results for 85 of the 620 r band SAS skycells. We took the full force summary cmf file and matched the sources to a catalog downloaded from
+SDSS DR10. The region extracted is the 8 x 8 degree region centered at ra = 334 dec = 0.
+
+In all there were 208597 sources matched. Of these 100513 are identified by SDSS as galaxies (type_r = 3). psphotStack obtained a successful extend model fit for 59923 sources of which 55241 were SDSS galaxies. 
+
+In the following we will focus on these "galaxies". In this sample 47318 galaxies with SDSS r < 21.5. We have extended model measurements for 41437 of these.
+
+==== Exponential Galaxies ====
+
+32134 of the SDSS galaxies in the sample have fracDev_r = 0, indicating that the SDSS composite model was equal to the exponential model. Here we refer these as expGalaxies. Of these 18125 were fitted with an extended source model
+by psphotStack. The best psphotStack model for 5438 objects was the exponential model, 11792 sersic, and 895 dev. 
+
+===== Exponential Model for SDSS Exponential Galaxies =====
+
+Here are plots of the difference between SDSS model fit major axis and magnitude and the psphot full force summary results
+for the expGalaxies.
+
+[[Image(dexprad.jpg)]] [[Image(dexpmag.jpg)]] [[Image(dexpmag_v_dexprad.jpg))]]