From: 	Frank Masci <fmasci@ipac.caltech.edu>
	Subject: 	v4.1 - v4.6 *WAPPco* comparison
	Date: 	January 5, 2012 3:57:21 PM PST
	To: 	Ken Marsh <kam@ipac.caltech.edu>, Tom Jarrett <jarrett@ipac.caltech.edu>, Roc Cutri <roc@ipac.caltech.edu>, Tim Conrow <tim@ipac.caltech.edu>
	Cc: 	Frank Masci <fmasci@ipac.caltech.edu>

Attached is the w3 mag-diff plot using *standard aperture* photometry: 4band cryo - 3band cryo(tb32 run).

For comparison, I have re-attached the plot that used w3mpro mags.

It appears that aperture mags are better behaved overall, albeit with a bias of ~1.7% in the opposite direction across *all exptimes*. A small aperture correction can probably fix that. So, there's something definitely weird with wpro and 1.1sec data in the v4.6 test runs.

Regards, Frank