Data model: sdss_target_geometry

General description: This file contains the information about the targeting in the SDSS DR7 Legacy survey. It contains various status bits derived from tsField files pulled out of the final opdb from SDSS-II. Additionally, we have determined the versions of target and photo used for each field. Finally, the geometry of each field that was used for targeting is included. The geometrical information describing the area of the field used for targeting is in mangle-type format (see the mangle documentation for a full explanation).

Naming convention: sdss_target_geometry.fits

Approximate size: 200 Mbytes.

File type: FITS

Read by products: sas

Written by products: sas

Required column names:

• RUN (int32): SDSS drift scan number
• RERUN (int32): SDSS rerun number
• CAMCOL (int32): SDSS camera column
• FIELD (int32): SDSS field number
• NOBJECTS (int32): number of non-bright objects in field
• NCHILD (int32): number of children in field
• NSTARS (int32): number of stars in field
• NGALS (int32): number of galaxies in field
• SKY[5] (float32): sky values (from opdb tsField)
• SKYSLOPE[5] (float32): sky slope values (from opdb tsField)
• PSF_WIDTH[5] (float32): PSF widths (from opdb tsField)
• FRAMES_STATUS (int32): status result for frames (from opdb tsField)
• PSP_STATUS (int32): status result for PSP (from opdb tsField)
• STATUS[5] (int32): quality status (from opdb tsField)
• CULLED (int32): is the field culled? (from opdb tsField)
• BADMASK (int32): is the field bad? (from opdb tsField)
• ACCEPTABLEMASK (int32): is the field acceptable? (from opdb tsField)
• GOODMASK (int32): is the field good? (from opdb tsField)
• HOLEMASK (int32): is the field bad but not to be replaced? (from opdb tsField)
• TARGET_VERSION (string): what version of target was used here?
• PHOTO_VERSION (string): what version of photo was used here?
• RACEN (float64): center of field in RA, J2000 deg
• DECCEN (float64): center of field in Dec, J2000 deg
• XCAPS[3, NCAPS] (float64): direction of cap defining tiling geometry, on unit sphere
• CMCAPS[NCAPS] (float64): size of each cap defining the field
• NCAPS (int32): number of caps (should be 1 for this file)
• USE_CAPS (int32): bitmask containing which caps to actually use
• WEIGHT (float64): weight for polygon (should be 1 for this file)
• PIXEL (int32): pixel # (should be -1, no pixelization)
• STR (float64): area in steradians of polygon