| column_name | description | unit | ucd | utype | datatype | principal | indexed |
|---|---|---|---|---|---|---|---|
| ra | Right ascension of image center | deg | pos.eq.ra;meta.main | double | 1 | 0 | |
| dec | Declination of image center | deg | pos.eq.dec;meta.main | double | 1 | 0 | |
| infobits | Info bit flags | meta.code | int | 1 | 0 | ||
| field | ZTF field number | meta.id;obs.field | int | 1 | 1 | ||
| ccdid | CCD number (1..16) | meta.id | short | 1 | 0 | ||
| qid | Quadrant ID (1..4) | meta.id | short | 1 | 0 | ||
| rcid | Readout-channel ID (0..63) | meta.id | short | 1 | 0 | ||
| fid | Filter ID | meta.id;instr.filter | short | 1 | 0 | ||
| filtercode | Filter code (abbreviated name) | meta.code;instr.filter | char | 1 | 0 | ||
| pid | Science product ID | meta.id | long | 1 | 1 | ||
| nid | Day/night ID | meta.id | int | 1 | 1 | ||
| expid | Exposure ID | meta.id;obs.exposure | int | 1 | 1 | ||
| itid | Image type ID | meta.id;obs.image | short | 1 | 0 | ||
| imgtype | Image type name | meta.id;obs.image | char | 1 | 0 | ||
| imgtypecode | Single letter image type code | meta.code.class;obs.image | char | 1 | 0 | ||
| obsdate | Observation UT date/time | time.epoch;obs.exposure | char | 1 | 1 | ||
| obsjd | Observation Julian day | d | time.epoch;obs.exposure | double | 1 | 1 | |
| exptime | Exposure time | s | time.duration;obs.exposure | float | 1 | 0 | |
| filefracday | Integer (YYYYMMDDdddddd) used in product file names | long | 1 | 0 | |||
| seeing | Seeing FWHM | arcsec | instr.obsty.seeing;stat.fwhm | float | 1 | 0 | |
| airmass | Telescope airmass | obs.airMass | float | 1 | 0 | ||
| moonillf | Moon illuminated fraction | arith.ratio | float | 1 | 0 | ||
| moonesb | Moon excess in sky brightness | float | 1 | 0 | |||
| maglimit | Magnitude limit | mag | phot.mag;stat.max | float | 1 | 0 | |
| crpix1 | Reference pixel value for axis 1 | pix | pos.wcs.crpix | float | 1 | 0 | |
| crpix2 | Reference pixel value for axis 2 | pix | pos.wcs.crpix | float | 1 | 0 | |
| crval1 | Reference position right ascension at crpix1,crpix2 | deg | pos.wcs.crval | double | 1 | 0 | |
| crval2 | Reference position declination at crpix1,crpix2 | deg | pos.wcs.crval | double | 1 | 0 | |
| cd11 | CD matrix element 1,1 | deg/pix | pos.wcs.cdmatrix | double | 1 | 0 | |
| cd12 | CD matrix element 1,2 | deg/pix | pos.wcs.cdmatrix | double | 1 | 0 | |
| cd21 | CD matrix element 2,1 | deg/pix | pos.wcs.cdmatrix | double | 1 | 0 | |
| cd22 | CD matrix element 2,2 | deg/pix | pos.wcs.cdmatrix | double | 1 | 0 | |
| ra1 | Right ascension of first image corner | deg | pos.eq.ra | double | 1 | 0 | |
| dec1 | Declination of first image corner | deg | pos.eq.dec | double | 1 | 0 | |
| ra2 | Right ascension of second image corner | deg | pos.eq.ra | double | 1 | 0 | |
| dec2 | Declination of second image corner | deg | pos.eq.dec | double | 1 | 0 | |
| ra3 | Right ascension of third image corner | deg | pos.eq.ra | double | 1 | 0 | |
| dec3 | Declination of third image corner | deg | pos.eq.dec | double | 1 | 0 | |
| ra4 | Right ascension of fourth image corner | deg | pos.eq.ra | double | 1 | 0 | |
| dec4 | Declination of fourth image corner | deg | pos.eq.dec | double | 1 | 0 | |
| ipac_pub_date | UT date/time of raw product release | time.release | char | 1 | 0 | ||
| ipac_gid | IPAC Group ID | meta.id | int | 1 | 0 | ||
| meta_id | Metadata record ID | meta.record | long | 0 | 1 | ||
| poly | Bounding polygon | pos.outline | char | 0 | 1 |