Description: Contains metadata related to an individual OTA image that comprises a portion of the full exposure. The characterization of the image quality, the detrends applied, and the astrometric solution from the raw pixels (X,Y) to the detector focal plane (L,M) is provided. |
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Name | Unit | Data Type | Size | Default Value | Description |
---|---|---|---|---|---|

imageID | dimensionless | BIGINT | 8 | NA | Unique image identifier. Constructed as (100 * frameID + ccdID). |

frameID | dimensionless | INT | 4 | NA | Unique frame/exposure identifier. |

ccdID | dimensionless | SMALLINT | 2 | NA | OTA identifier based on location in the focal plane, specific to an individual device. |

photoCalID | dimensionless | INT | 4 | NA | Photometric calibration identifier. Details in the PhotoCal table. |

filterID | dimensionless | TINYINT | 1 | NA | Filter identifier. Details in the Filter table. |

bias | adu | REAL | 4 | -999 | OTA bias level. |

biasScat | adu | REAL | 4 | -999 | Scatter in bias level. |

sky | Janskys/arcsec^2 | REAL | 4 | -999 | Mean sky brightness. |

skyScat | Janskys/arcsec^2 | REAL | 4 | -999 | Scatter in mean sky brightness. |

nDetect | dimensionless | INT | 4 | -999 | Number of detections in this image. |

detectionThreshold | magnitudes | REAL | 4 | -999 | Reference magnitude for detection efficiency calculation. |

astroScat | arcsec | REAL | 4 | -999 | Measurement of the calibration (not astrometric error) defined to be the sum in quadrature of the standard deviations in the X and Y directions. |

photoScat | magnitudes | REAL | 4 | -999 | Photometric scatter relative to reference catalog. |

nAstroRef | dimensionless | INT | 4 | -999 | Number of astrometric reference sources. |

nPhotoRef | dimensionless | INT | 4 | -999 | Number of photometric reference sources. |

recalAstroScatX | arcsec | REAL | 4 | -999 | Measurement of the re-calibration (not astrometric error) in the X direction. |

recalAstroScatY | arcsec | REAL | 4 | -999 | Measurement of the re-calibration (not astrometric error) in the Y direction. |

recalNAstroStars | dimensionless | INT | 4 | -999 | Number of astrometric reference sources used in recalibration. |

recalphotoScat | magnitudes | REAL | 4 | -999 | Photometric scatter relative to reference catalog. |

recalNPhotoStars | dimensionless | INT | 4 | -999 | Number of astrometric reference sources used in recalibration. |

nAxis1 | pixels | SMALLINT | 2 | -999 | Image dimension in x. |

nAxis2 | pixels | SMALLINT | 2 | -999 | Image dimension in y. |

psfModelID | dimensionless | INT | 4 | -999 | PSF model identifier. |

psfFWHM | arcsec | REAL | 4 | -999 | Mean PSF full width at half maximum at image center. |

psfWidMajor | arcsec | REAL | 4 | -999 | PSF major axis FWHM at image center. |

psfWidMinor | arcsec | REAL | 4 | -999 | PSF minor axis FWHM at image center. |

psfTheta | degrees | REAL | 4 | -999 | PSF major axis orientation at image center. |

momentMajor | arcsec | REAL | 4 | -999 | PSF major axis second moment. |

momentMinor | arcsec | REAL | 4 | -999 | PSF minor axis second moment. |

momentM2C | arcsec^2 | REAL | 4 | -999 | Moment M2C = M_xx - M_yy. |

momentM2S | arcsec^2 | REAL | 4 | -999 | Moment M2S = 2 * M_xy. |

momentM3 | arcsec^2 | REAL | 4 | -999 | trefoil second moment = sqrt( (M_xxx - 3 * M_xyy)^2 + (3 * M_xxy - M_yyy)^2 ). |

momentM4 | arcsec^2 | REAL | 4 | -999 | quadrupole second moment = sqrt( (M_xxxx - 6 * M_xxyy + M_yyyy)^2 + (4 * M_xxxy - 4 * M_xyyy)^2 ). |

apResid | magnitudes | REAL | 4 | -999 | Residual of aperture corrections. |

dapResid | magnitudes | REAL | 4 | -999 | Scatter of aperture corrections. |

detectorID | dimensionless | VARCHAR(100) | 100 | Identifier for each individual OTA detector device. | |

qaFlags | dimensionless | BIGINT | 8 | -999 | Q/A flags for this image. Values listed in ImageFlags. |

detrend1 | dimensionless | VARCHAR(100) | 100 | Identifier for detrend image 1, the static mask. | |

detrend2 | dimensionless | VARCHAR(100) | 100 | Identifier for detrend image 2, the dark model. | |

detrend3 | dimensionless | VARCHAR(100) | 100 | Identifier for detrend image 3, the flat. | |

detrend4 | dimensionless | VARCHAR(100) | 100 | Identifier for detrend image 4, the fringe. | |

detrend5 | dimensionless | VARCHAR(100) | 100 | Identifier for detrend image 5, the noisemap. | |

detrend6 | dimensionless | VARCHAR(100) | 100 | Identifier for detrend image 6, the non-linearity correction. | |

detrend7 | dimensionless | VARCHAR(100) | 100 | Identifier for detrend image 7, the video dark model. | |

detrend8 | dimensionless | VARCHAR(100) | 100 | Identifier for detrend image 8. | |

photoZero | magnitudes | REAL | 4 | -999 | Locally derived photometric zero point for this image. |

ctype1 | dimensionless | VARCHAR(100) | 100 | Name of astrometric projection in focal plane L. | |

ctype2 | dimensionless | VARCHAR(100) | 100 | Name of astrometric projection in focal plane M. | |

crval1 | focal plane pixels | FLOAT | 8 | -999 | Focal plane L corresponding to reference pixel. |

crval2 | focal plane pixels | FLOAT | 8 | -999 | Focal plane M corresponding to reference pixel. |

crpix1 | raw pixels | FLOAT | 8 | -999 | Reference pixel for focal plane L. |

crpix2 | raw pixels | FLOAT | 8 | -999 | Reference pixel for focal plane M.; |

cdelt1 | focal plane pixels/raw pixel | FLOAT | 8 | -999 | Pixel scale in focal plane x. |

cdelt2 | focal plane pixels/raw pixel | FLOAT | 8 | -999 | Pixel scale in focal plane y. |

pc001001 | dimensionless | FLOAT | 8 | -999 | Linear transformation matrix element between image pixel x and focal plane pixel L. |

pc001002 | dimensionless | FLOAT | 8 | -999 | Linear transformation matrix element between image pixel y and focal plane pixel L. |

pc002001 | dimensionless | FLOAT | 8 | -999 | Linear transformation matrix element between image pixel x and focal plane pixel M. |

pc002002 | dimensionless | FLOAT | 8 | -999 | Linear transformation matrix element between image pixel y and focal plane pixel M. |

polyOrder | dimensionless | TINYINT | 1 | 255 | Polynomial order of astrometric fit between the image pixels and the detector focal plane. |

pca1x3y0 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^3 y^0) for focal plane L. |

pca1x2y1 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^2 y^1) for focal plane L. |

pca1x1y2 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^1 y^2) for focal plane L. |

pca1x0y3 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^0 y^3) for focal plane L. |

pca1x2y0 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^2 y^0) for focal plane L. |

pca1x1y1 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^1 y^1) for focal plane L. |

pca1x0y2 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^0 y^2) for focal plane L. |

pca2x3y0 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^3 y^0) for focal plane M. |

pca2x2y1 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^2 y^1) for focal plane M. |

pca2x1y2 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^1 y^2) for focal plane M. |

pca2x0y3 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^0 y^3) for focal plane M. |

pca2x2y0 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^2 y^0) for focal plane M. |

pca2x1y1 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^1 y^1) for focal plane M. |

pca2x0y2 | dimensionless | FLOAT | 8 | -999 | Polynomial coefficient for the astrometric fit component (x^0 y^2) for focal plane M. |

processingVersion | dimensionless | TINYINT | 1 | NA | Data release version. |