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DR1 and DR1plus Release - July 2006

A description of the data and how it is held in the archive is given in the data overview.

DR1 Release Summary

Survey	No. of multiframes		No. of objects in detection table		No. of sources in source table		Approximate depths	Plots
	DR1	DR1plus	DR1	DR1plus	DR1	DR1plus
LAS	63246	65750	12,384,698	18,878,672	4,202,729	8,721,240	Y=20.2, J=19.6, H=18.8, K=18.2	link
GPS	57082	58849	77,044,205	192,511,728	30,564,982	141,178,984	J=19.8, H=19.0, K=18.1	link
GCS	43691	46045	10,788,032	24,594,591	3,211,061	13,264,107	Z=20.4, Y=20.1, J=19.6, H=18.8, K=18.2	link
DXS	108976	108996	5,931,901	6,229,079	298,702	595,880	J=21.3-22.4,K=20.0-21.0	link
UDS	29791	29791	192,203	192,203	96,101	96,101	J=22.6, K=21.5	link

Particular attention should be given to the following notes detailing limitations and bugs (see also generic issues and bugs noted under Known Issues):

KNOWN LIMITATIONS:

• 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 images.
• 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.