DR1 and DR1plus Release - July 2006
The charts linked below show the status of the UKIDSS surveys in this release.
DR1plus is a superset of DR1 that in addition contains data from fields that
have incomplete waveband coverage as prescribed by a given survey.
A description of the data and how it is held in the archive is given in the
DR1 Release Summary
||No. of multiframes
||No. of objects in
|No. of sources in
||Y=20.2, J=19.6, H=18.8, K=18.2
||J=19.8, H=19.0, K=18.1
||Z=20.4, Y=20.1, J=19.6, H=18.8, K=18.2
Particular attention should be given to the following notes
detailing limitations and bugs (see also generic issues and bugs noted under
- In creating UKIDSSDR1, all frame sets having incomplete filter coverage
have been removed (they remain in the UKIDSSDR1PLUS). This applies to all
stack image, single-passband catalogue detections derived from them and
merged source data.
Note however that the ancestor images of these stacks (e.g.
normal and interleaved frames and their corresponding confidence images)
still remain in the UKIDSSDR1 database.
- There are a variety of image defects in the pixel data that may give
rise to spurious catalogue detections with unusual colours. These result
from, amongst other things, residual cross-talk images and persistence
- Data taken in semester 05A included in this release were processed
with an older version of the CASU pipeline than the 05B data. The main
differences being in sky subtraction and handling of cross-talk images.
WFAU, Institute for Astronomy,
Royal Observatory, Blackford Hill
Edinburgh, EH9 3HJ, UK