Changes between Version 42 and Version 43 of Durham_MDS_Testing

Timestamp:

Aug 12, 2009, 5:41:34 AM (17 years ago)

Author:

kpat.jhu

Comment:

Added more results from Nigel Metcalfe's email 2009.08.12

Durham_MDS_Testing

@@ -96 +96 @@
 The file attachment:md07_stack_zeropoints lists the zero points for each skycell in g,r,i and z. attachment:md08_stack_zeropoints is the version for MD08.
 
+== zeropoints in stacked frames == #zeropoints-stacked
+
+I have measured the zeropoints from the MD07/08 stacks, from comparing IPP cmf uncalibrated PSF mags with SDSS
+
+||filter||MD07||MD08||
+||g||24.46||24.42||
+||r||24.68||24.71||
+||i||24.70||24.70||
+||z||24.18||24.23||
+
+These are all slightly brighter (0.05-0.1) than [wiki:GPC_Zero_Points_July09 Eddie Schlafly's values]. There will be correction (of the right sign) for light missing outside the IPP PSF though.
+
+--Nigel
+
+
 == Detection threshold differences ==
 
@@ -109 +124 @@
 
 [[Image(gals_r_saturation.jpg, 425px)]]
+
+
+