Photometry Diagnostics for m31_u3yk01

Frame list, with derived and commanded shifts

dataset	filter	exptime	derived dx	derived dy	header dx	header dy	delta dx	delta dy
u3yk0101r	F555W	900.00	0.00	0.00	0.00	0.00	0.00	0.00
u3yk0102r	F555W	1300.00	0.11	-0.17	0.00	0.00	0.11	-0.17
u3yk0103r	F555W	1300.00	0.06	0.08	0.00	0.00	0.06	0.08
u3yk0104r	F555W	1200.00	0.09	0.03	0.00	0.00	0.09	0.03
u3yk0105r	F555W	1200.00	-0.10	0.59	0.00	0.00	-0.10	0.59
u3yk0106r	F814W	1000.00	0.09	0.32	0.00	0.00	0.09	0.32
u3yk0107r	F814W	600.00	0.13	0.30	0.00	0.00	0.13	0.30
u3yk0108r	F814W	600.00	0.02	0.09	0.00	0.00	0.02	0.09
u3yk0109r	F814W	1200.00	0.11	0.30	0.00	0.00	0.11	0.30
u3yk010ar	F814W	1200.00	0.08	0.55	0.00	0.00	0.08	0.55
u3yk010br	F814W	800.00	0.10	0.50	0.00	0.00	0.10	0.50
u3yk010cr	F814W	800.00	0.17	0.41	0.00	0.00	0.17	0.41

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