Version 1 (modified by jbecla, 11 years ago) (diff) |
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Common Vocabulary
used name | unit | type | full name | comments |
ra | degrees | int64 | right ascention | |
decl | degrees | int64 | declination | dec is a reserved word in most DBMSes |
equinox | int32 | equinox of World Coordinate System | ||
url | - | string | logical url of the corresponding FITS file |
ctype1 | string(20) | Coordinate projection type, axis 1 | ||
ctype2 | string(20) | Coordinate projection type, axis 2 | ||
crpix1 | float | Coordinate reference pixel, axis 1 | ||
crpix2 | float | Coordinate reference pixel, axis 2 | ||
crval1 | double | Coordinate value 1 @reference pixel | ||
crval2 | double | Coordinate value 2 @reference pixel | ||
cunit1 | varchar(10) | X axis units | ||
cunit2 | varchar(10) | Y axis units | ||
cdelt1 | float | Obsolete by cd_xx terms? | ||
cdelt2 | float | Obsolete by cd_xx terms? | ||
cd11 | float | First derivative of coordinate 1 w.r.t. axis 1 | ||
cd21 | float | First derivative of coordinate 2 w.r.t. axis 1 | ||
cd12 | float | First derivative of coordinate 1 w.r.t. axis 2 | ||
cd22 | float | First derivative of coordinate 2 w.r.t. axis 2 | ||
dateObs | datetime | Date/Time? of observation start (UTC) | ||
taiObs | datetime | TAI-OBS = UTC + offset. Offset = 32 s from 1/1/1999 to 1/1/2006, = 33 s after 1/1/2006 | ||
mjdObs | double | MJD of observation start | ||
expTime | float | Duration of exposure | ||
darkTime | float | Total elapsed time from exposure start to end of read | ||
zd | float | Zenith distance at observation mid-point | ||
airmass | float | Airmass value for the Amp reference pixel | preferably center, but not guaranteed) |
binX | int16 | binning in X-coordinate | ||
binY | int16 | binning in Y-coordinate | ||
sizeX | int16 | Size of the image in X-direction (along rows; binned pixels) | Ignores overscan but includes regions that may be considered outside of the data portion of the image | |
sizeY | int16 | Size of the image in Y-direction (along columns; binned pixels) | Ignores overscan but includes regions that may be considered outside of the data portion of the image | |
tai | double | time of shutter open (international atomic time) | ||
texp | float | Exposure time for this particular Amplifier | ||
bias | float | Bias level for the calibrated image | ||
gain | float | Gain value for the amplifier | ||
rdNoise | electrons | float | Read noise value for this AmpExposure? | |
telAngle | degrees | float | Orientation angle of the telescope w.r.t sky | This is different from camera orientation w.r.t sky (encapsulated in WCS), since telescope is on alt-az mount |
az | degrees | float | Azimuth of observation | preferably at center of exposure at center of image and including refraction correction, but none of this is guaranteed |
alt | degrees | float | Altitude of observation | preferably at center of observation at center of image and including refraction correction, but none of this is guaranteed |
zpt | double | Photometric zero point magnitude | ||
sky | float | The average sky level in the frame | ||
skySig | float | Sigma of distribution of sky values | ||
psf_nstar | int32 | Number of stars used for PSF measurement | ||
psf_apcorr | float | Photometric error due to imperfect PSF model (aperture correction) | ||
psf_sigma1 | float | Inner Gaussian sigma for the composite fit (XXX) | ||
psf_sigma2 | float | Outer Gaussian sigma for the composite fit (XXX) | ||
psf_b | float | Ratio of inner PSF to outer PSF (XXX) | ||
psf_b_2G | float | Ratio of Gaussian 2 to Gaussian 1 at origin (XXX) | ||
psf_p0 | float | The value of the power law at the origin (XXX) | ||
psf_beta | float | The slope of the power law (XXX) | ||
psf_sigmap | float | Width parameter for the power law (XXX) | ||
psf_nprof | float | Number of profile bins (XXX) | ||
fwhm | float | Effective PSF width | ||
sigma_x | float | |||
sigma_y | float | |||
posAngle | float | psf related | ||
peak | float | psf related | ||
x0 | float | psf related | ||
x1 | float | psf related | ||
radesys | string(5) | Type of WCS used. Obsolete in ICRS | ||
equinox | float | Equinox of the WCS. Obsolete in ICRS |
uMagnitude | double | magnitude (weighted average) | for u filter | |
uPetroMag | double | petrosian magnitude | for u filter | |
uApMag | double | aperture magnitude | for u filter |
uIxx | float | Adaptive second moment | for u filter | |
uIyy | float | Adaptive second moment | for u filter | |
uIxy | float | Adaptive second moment | for u filter |
uErrA | arcsec | float | Large dimension of the position error ellipse, assuming gaussian scatter | for u filter |
uErrB | arcsec | float | Small dimension of the position error ellipse, assuming gaussian scatter | for u filter |
uErrTheta | degrees | float | Orientation of the position error ellipse | For u filter |
uAmplitude | float | amplitude | for u filter |
uPeriod | float | period of magnitude variations | for u filter | |
primaryPeriod | float | Average period across all filters |
uTimescale | days | float | timescale of flux variations | for u filter |
uNumObs | int32 | number of measurements in the lightcurve | for u filter | |
uVarProb | % | int16 | probability of variability. 100% = variable object | for u filter |
mops related | ||||
a | float | semi-major axis of the orbit (AU) | ||
incl | degrees | float | inclination of the orbit | |
e | float | eccentricity of the orbit | ||
periTAI | float | TAI of the perihelion passage (comets) | ||
periDist | float | Perihelion distance (AU) | ||
omega | float | argument of perihelion | ||
node | float | longitude of the ascending node | ||
meanAnom | float | mean anomaly of the orbit | ||
qual | float | measure of the accuracy of the derived orbit, classification, etc. | can be more than one. Placeholder | |
various ids | ||||
alertId | int32 | id of an Alert | ||
amplifierId | int16 | id of amplifier | ||
ccExposureId | int64 | if of CCD exposure | ||
filterId | int8 | id of LSST filter | ||
objectId | int64 | id of an Astronomical Object | ||
movingObjectId | int64 | id of a Moving Object | ||
visitId | int32 | id of a Visit |
unit for errors the same as the unit of column, for which the error is defined