Changes between Version 7 and Version 8 of ZoologyCrossmatching

Timestamp:

Sep 1, 2011, 12:37:08 PM (15 years ago)

Author:

rhenders

Comment:

--

ZoologyCrossmatching

@@ -4 +4 @@
 = Outline =
 
-This page outlines an investigation into the cross-matching used by the Durham group to generate the 'true positives' and 'false positives' data subsets. Durham supplied the following files (FITS binary table format):
+This page outlines an investigation into the cross-matching used by the Durham group to generate the 'true positives' and 'false positives' data subsets. Durham used TOPCAT to perform the cross-match, and presented the results as FITS files. Our aim is to reproduce the same results as Durham then experiment with different cross-matching parameters. 
 
+= Durham-supplied data =
 
+Durham supplied the following files (FITS binary table format) for analysis.
 
 || '''File''' || '''Rows''' || '''Comments''' ||
@@ -20 +22 @@
 || footprint-y-not-matched-psphot.fits.bz2|| 46,729 || all IPP false detections in z ||
 || footprint-z-not-matched-psphot.fits.bz2|| 51,391|| all IPP false detections in y ||
+
+= Durham method =
+
+Durham used TOPCAT to perform the cross-matching. They used the following settings:
+
+ * 'Algorithm' : Sky
+ * 'Max Error' : 1.0 arcsec
+ * 'Match Selection' : Best Match Only
+
+It is thought (by Nigel Metcalfe) that Peter Draper cut the Sloan data on BINNED1=true. I applied this cut, and it only removed 428 sourced out of a total of 449,254.
+ 
+