Information on DQC plots and log
Summary Plots
The two plots on page one of the summary.ps files use different colour codes for each filter:
- J : blue
- H : green
- K : red
- Y : black
- Z : cyan
The plots on page two of the summary.ps files use different colour codes for each chip:
- Chip #1 : red
- Chip #2 : green
- Chip #3 : blue
- Chip #4 : cyan
On each plot, there is one dot per data product (catalogue). The 5-sigma magnitude limits are computed for the output product frames for each MSB. Zeros for the seeing indicate no measure was possible and usually indicate a problem with the data for that detector.
Photometry Plots
The colour codes used in the plots shown in the photom.ps are used
to show the different filters and use the same convention descibed
above for page 1 summary plots.
The points are the instrumental zero-points derived from 2MASS
cross-matches (+colour equations) using for now a nominal extinction
value of 0.05 in all bands. The dashed lines gives a rough reference of
the expeceted photometric
zero point for a perfectly photometric night. The open dots on the
rightmost part of the plot
show for each filter the mean zero point and the corresponding error
bar (variation) for the whole night.
The
open circles in the data points are ones where the measured seeing is
worse than 2 arcsec or the stellar ellipticity is worse than 0.3, i.e.
the images are severely trailed.
Observation log
The index files with the observation log for each night contain the following information:
- image name
- value of the PROJECT header keyword (Time-allocation code).
- value of the object keyword (Object name from telescope).
- value of the OBSTYPE keyword (BIAS|DARK|SKYFLAT|DOMEFLAT|OBJECT|SKY|FOCUS).
- value of the FILTER keyword (Filter name).
- value of the EXP_TIME keyword (Integration time per exposure [s]).
- value of the DATE-OBS keyword (Date time (UTC) of start of observation).
- value of the NJITTER keyword (Number of positions in telescope jitter pattern).
- value of the JITTER_I keyword (Serial number in this telescope jittern pattern).
- value of the NEXP keyword (Number of exposures in integration).
- value of the READMODE keyword (Name of the camera readmode).
