Photometry Diagnostics for m31_u3d901

Frame list, with derived and commanded shifts

dataset	filter	exptime	derived dx	derived dy	header dx	header dy	delta dx	delta dy
u3d90207t	F555W	2200.00	0.00	0.00	0.00	0.00	0.00	0.00
u3d9020dt	F555W	2800.00	1.58	0.08	1.88	-0.16	-0.30	0.24
u3d9020jt	F555W	2800.00	2.55	0.31	3.76	-0.32	-1.21	0.63
u3d9020at	F814W	2800.00	-0.08	0.06	0.00	0.00	-0.08	0.06
u3d9020gt	F814W	2800.00	1.43	0.22	1.88	-0.16	-0.45	0.38
u3d9020mt	F814W	2800.00	2.38	0.63	3.76	-0.32	-1.38	0.95
u3d90107t	F439W	2800.00	-0.16	-0.22	0.00	0.00	-0.16	-0.22
u3d9010at	F439W	2800.00	-0.16	-0.24	0.00	0.00	-0.16	-0.24
u3d9010dt	F439W	2800.00	-2.23	-0.05	-1.88	0.16	-0.35	-0.21
u3d9010gt	F439W	2800.00	-2.22	-0.08	-1.88	0.16	-0.34	-0.24
u3d9010jt	F439W	2800.00	1.58	-0.28	1.88	-0.16	-0.30	-0.12
u3d9010mt	F439W	2800.00	1.59	-0.26	1.88	-0.16	-0.29	-0.10
u3d9020qt	F336W	2800.00	-39.95	20.43	-36.57	19.13	-3.38	1.30

Mosaic images

F555W	F814W	F439W	F336W

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
f439w
f336w

CHI vs. magnitude diagrams

	All chips	PC	WF2	WF3	WF4
f555w
f814w
f439w
f336w

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