TABLE RequiredStack

Contains details of default stack image products curated in the archive.

This table contains details of all the default image stack products that
are curated within the archive as part of the requirements for a
particular survey. For example, the UKIDSS UDS is a deep stacked survey.
The stacking curation task implemented within the archive uses the
information in this table to produce the required stack(s) for a given
programme when invoked as part of archive operations.

Required constraints:
Primary key is (programmeID,productID)
(programmeID) references Programme(programmeID)
(filterID) references Filter(filterID)

Name Type Length Unit Description Default Value Unified Content Descriptor

programmeID int 4 The unique programme ID ID_SURVEY

productID int 4 A unique identifier assigned to each required stack product entry ??

name varchar 64 Name of the stacked product ??

description varchar 256 Description of the product ??

filterID tinyint 1 UID of WFCAM filter INST_FILTER_CODE

ra float 8 degrees Right Ascension of stack centre POS_EQ_RA_MAIN

dec float 8 degrees Declination of stack centre POS_EQ_DEC_MAIN

wcs varchar 1 CASU stacking tool option to switch use of image WCS to register images (y/n; recommended value=y) ??

clip varchar 1 CASU stacking tool option to perform 3-sigma (robustly estimated) clipping before stacking pixels (y/n; recommended value=y) ??

nPixels smallint 2 CASU source extraction tool option for minimum number of connected pixels in a detected source (recommended value=4) -9999 ??

threshold real 4 sigma CASU source extraction tool option for the isophotal analysis threshold (recommended value=1.5) -0.9999995e9 ??

crowd tinyint 1 CASU source extraction tool option to switch on/off (1/0) crowded field analysis (recommended value=1) 0 ??

rCore real 4 pixels CASU source extraction tool option for default profile fitting radius (recommended value=expected image FWHM) -0.9999995e9 ??

nBlockSize smallint 2 pixels CASU source extraction tool option to override the default background blockdown size (=64, the recommended value) -9999 ??

Total length 360

Name	Type	Length	Unit	Description	Default Value	Unified Content Descriptor
programmeID	int	4		The unique programme ID		ID_SURVEY
productID	int	4		A unique identifier assigned to each required stack product entry		??
name	varchar	64		Name of the stacked product		??
description	varchar	256		Description of the product		??
filterID	tinyint	1		UID of WFCAM filter		INST_FILTER_CODE
ra	float	8	degrees	Right Ascension of stack centre		POS_EQ_RA_MAIN
dec	float	8	degrees	Declination of stack centre		POS_EQ_DEC_MAIN
wcs	varchar	1		CASU stacking tool option to switch use of image WCS to register images (y/n; recommended value=y)		??
clip	varchar	1		CASU stacking tool option to perform 3-sigma (robustly estimated) clipping before stacking pixels (y/n; recommended value=y)		??
nPixels	smallint	2		CASU source extraction tool option for minimum number of connected pixels in a detected source (recommended value=4)	-9999	??
threshold	real	4	sigma	CASU source extraction tool option for the isophotal analysis threshold (recommended value=1.5)	-0.9999995e9	??
crowd	tinyint	1		CASU source extraction tool option to switch on/off (1/0) crowded field analysis (recommended value=1)	0	??
rCore	real	4	pixels	CASU source extraction tool option for default profile fitting radius (recommended value=expected image FWHM)	-0.9999995e9	??
nBlockSize	smallint	2	pixels	CASU source extraction tool option to override the default background blockdown size (=64, the recommended value)	-9999	??
Total length		360