Changes between Version 11 and Version 12 of MD_WSdiffim_photcheck_test20121004

Timestamp:

Nov 1, 2012, 5:54:57 PM (14 years ago)

Author:

asteroidnerd

Comment:

--

MD_WSdiffim_photcheck_test20121004

@@ -42 +42 @@
 }}}
 
-Although this is the best example in the database because of the density of measurements and the known small amplitude of any lightcurve, we may be misled because of the slow motion of the object causing problems in brightness measurements. But this should not only occur if MOPS is being fed warp-stack measurements, and it should make the object fainter not brighter as seen. The variation in z-band and in other filters in 2012 is also puzzling.
+This is the best example in the database because of the density of measurements and the known small amplitude of any lightcurve. In warp-warp diffs the slow motion will mean that 3PI and OSS measurements would be incorrect due to self-subtraction of the flux. But this should not only occur in MD fields as MOPS is being fed warp-stack measurements, and it would make the object fainter not brighter as seen. The variation in z-band and in other filters in 2012 is also puzzling.
 
 Plot of observed magnitudes converted to V (top), and residual of magnitude (observed - predicted), in 2011 and 2012: