Short Description of

1
Short Description of The SIKKEMA SetGert
Sikkema, Kapteyn Institute, Groningen
Surname of a Phd student who has now quite some
experience with the 'The System.
2
WFI Pilot Project
Observing a 2dfGRS region in VRI. WFI pilot
project
by P. Heraudeau
by P. Heraudeau
-) 18 WFI pointings, 4 square degree 1000
redshifts from 2dfGRS. -) Limiting mags in V,R,I
25, 24.5, 24.5 mag/arcsec2 160000 ss. -)
Observations in OMEGACAM observation mode Polar
fields bad (use only OBJECT2df and STD) V
band not photometric.
3
Data Reductions---------------------------------
-----------------------------)can do all
reductions within a week-) readnoise, bias,
cold, hot pixels, dome, twilight, master flat,
cosmics, straightforward-) pay attention to
overscan correction method 8.-) pay VERY MUCH
attention to time stamps.-)I sometimes gave
quality flags to data (bad from logs)? not
used-) easy to use DB viewer and CalTSmore
sophisticated and sometimes more trustworthy
calls from prompt. -) did global photometry
writing my own scripts in awe -) BACKGROUND
subtraction to do structural analysis.Past
Change SExtractor values BACK_SIZE and
BACK_FILTERSIZE in code Now new background
subtraction method.
4
Problems not adressed with my data set

• BACKGROUND problem for moderately crowded fields
  or large objects..

5
(No Transcript)