Photometry Diagnostics for m31_u3dg01


Frame list, with derived and commanded shifts
dataset filter exptime derived dx derived dy header dx header dy delta dx delta dy
u3dg0107t F555W 1200.00 0.00 0.00 0.00 0.00 0.00 0.00
u3dg0109t F555W 600.00 -0.14 0.09 0.00 0.00 -0.14 0.09
u3dg010ft F814W 1200.00 0.10 0.06 0.00 0.00 0.10 0.06
u3dg010ht F814W 1300.00 -0.05 0.19 0.00 0.00 -0.05 0.19
u3dg010bt F450W 1200.00 -0.36 -0.03 0.00 0.00 -0.36 -0.03
u3dg010dt F450W 1300.00 -0.44 0.07 0.00 0.00 -0.44 0.07

Mosaic images

F555W F814W F450W

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
f450w

CHI vs. magnitude diagrams

All chips
PC
WF2
WF3
WF4
f555w
f814w
f450w

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
F555W F814W F450W

Aperture correction for each frame/chip, showing individual stars
All chips
PC
WF2
WF3
WF4
f555w
f555w
f814w
f450w

PSF vs. aperture photometry

All chips
PC
WF2
WF3
WF4
f555w
f814w
f450w

Artificial star diagrams


Completeness as a function of input magnitude
PSF photometry Aperture photometry

Recovered mag-input mag as a function of input mag (PSF photometry)
All chips
PC
WF2
WF3
WF4
f555w
f814w
f450w

Average recovered magnitude as function of location in CMD (PSF photometry)
All chips
PC
WF2
WF3
WF4