Photometry Diagnostics for m31_u2gv03

Frame list, with derived and commanded shifts

dataset	filter	exptime	derived dx	derived dy	header dx	header dy	delta dx	delta dy
u2gv0301t	F555W	1600.00	0.00	0.00	0.00	0.00	0.00	0.00
u2gv0302t	F555W	1500.00	0.00	0.06	0.00	0.00	0.00	0.06
u2gv0303t	F814W	2300.00	0.21	0.09	0.00	0.00	0.21	0.09
u2gv0304t	F814W	2300.00	0.27	0.18	0.00	0.00	0.27	0.18
u2gv0305t	F814W	2300.00	0.25	0.15	0.00	0.00	0.25	0.15
u2gv0306t	F814W	2300.00	0.31	0.25	0.00	0.00	0.31	0.25
u2gv0307t	F814W	2300.00	0.29	0.17	0.00	0.00	0.29	0.17

Mosaic images

F555W	F814W

HSTPHOT command log

Color magnitude diagrams

	All chips	PC	WF2	WF3	WF4
PSF
Aperture

Error vs. magnitude diagrams

	All chips	PC	WF2	WF3	WF4
f555w
f814w

CHI vs. magnitude diagrams

	All chips	PC	WF2	WF3	WF4
f555w
f814w

Aperture corrections

Aperture corrections compared with those of entire database (green points are this field)
If aperture corrections appear to be significant outliers in the global trend, you should be cautious about their quality, and consider that the zeropoints of photometry and colors are more suspect