I assume you have: (A) dark substracted (or used auto-dark) (B) flat fielded FIT images
produced from CCDops and are using the STL camera (instead of the older ST-7E)

You should use /ccd/fitheader2 to make a log file

NOTE: In CCPops, western images are rotated 180 deg; in gaia a left-right flip is required

bethe 38% gaia

View->Colors->Logarithmic
for max contrast

flip top<->bottom for normal view


for photometry:

Image-Analysis->Aperture photometry->Results in magnitudes
Parameters->
Exposure time source: FITS keyword
Exposure time/qualifier: EXPTIME
Image bias level: 100
Photons per data unit: 2.03
Saturation value: 57000
Sky estimator->clipped mean

Options->Keep apertures same size

if stars are not all circles: turn off centroiding:
Perform centroiding: deselect

Define object aperture
Define object aperture
Define object aperture
Define object aperture
etc
Calculate Results
Note: code: S=saturated, E=edge, ?=other problem
Append (to file)

NOTE: use of
fgrep -v # GaiaPhotomLog.Dat | cut -b 35-41
for clean copy&paste of magnitudes

if must move sky from star:
Options->Use annular sky regions (de-select)
Then hit 
Define sky aperture
to find background (sky) values

Find pixel values:
Image-Analysis->Mean X&Y profiles
View->Pixel Table

making finder charts with gaia:
Data-Servers->Image Servers->Digitized Sky at CADC (2nd generation)
enter Object Name, Width, Height (in ') as desired
click Get Image
Colors (Intensity->neg)
Image-Analysis->Overlay axis grid (click Draw)
Print (Landscape)

for astrometry...

copying positions from a DSS

two windows:
(1) with DSS
(2) with unknown

Image-Analysis->Astrometry calibration->Fit to star positions
click: Transfer
in Transfer section of Transfer coordinates window
Add row
select RA/Dec image to be unknown
Update X-Y
click on star
select RA/Dec image to be DSS
Update RA-Dec
click on same star 

Add row...etc

Accept

in Fit astronmetry reference positions window
(which now has Reference positions)
Fit/Test
Accept
Rms of fit = 0.8078839454997635 (arcsec), 0.36395111425516774 (pixels)
x,y scales = 2.2214354835172312, 2.2180835280022797 (arcsec/pixel)
orientation = -158.78243500000002 (degrees)

old system: Exposure time/qualifier: EXPOSED

ST-7E
Photons per data unit: 2.3
Saturation value: 22000