| ncand | number of candidates that cite this object (integer) |
| ramean | mean RA in degrees |
| decmean | mean Dec in degrees |
| rastd | standard deviation of RA in arcseconds |
| decstd | standard deviation of Dec in arcseconds |
| glonmean | mean galactic longitude in degrees |
| glatmean | mean galactic latitude in degrees |
| maggmin | minimum g magnitude of candidates that cite this object |
| maggmax | maximum g magnitude of candidates that cite this object |
| maggmedian | median g magnitude of candidates that cite thisobject |
| maggmean | mean g magnitude of candidates that cite thisobject |
| magrmin | minimum r magnitude of candidates that cite thisobject |
| magrmax | maximum r magnitude of candidates that cite thisobject |
| magrmedian | median r magnitude of candidates that cite thisobject |
| magrmean | mean r magnitude of candidates that cite thisobject |
| latestgmag | latest g magnitude of candidates that cite this object |
| latestrmag | latest r magnitude of candidates that cite this object |
| jdmin | earliest Julian Day of candidates that cite this object |
| jdmax | latest Julian Day of candidates that cite this object |
| rank | Rank of the match, 1 being best (integer) |
| catalogue_object_type | Type of crossmatched catalogued astrophysical source (Can be: star, galaxy, cv, cb, agn, other, unknown) (string) |
| association_type | Predicted transient classification if correctly associated with catalogued astrophysical source (VS, SN, CV, BS, NT, AGN, UNKNOWN) (string) |
| separationArcsec | Separation from the candidate |
| northSeparationArcsec | Separation north |
| eastSeparationArcsec | Separation east |
| catalogue_table_name | Name of the catalog with the matched object (string) |
| catalogue_object_id | ID in the named catalog (integer) |
| z | Redshift of the object |
| distance | Distance of the object in Mpc |
| U | U magnitude if known |
| UErr | Error on U magnitude |
| B | B magnitude if known |
| BErr | Error on B magnitude |
| V | V magnitude if known |
| VErr | Error on V magnitude |
| G | G magnitude if known |
| GErr | Error on G magnitude |
| R | R magnitude if known |
| RErr | Error on R magnitude |
| I | I magnitude if known |
| IErr | Error on I magnitude |
| J | J magnitude if known |
| JErr | Error on J magnitude |
| H | H magnitude if known |
| HErr | Error on H magnitude |
| K | K magnitude if known |
| KErr | Error on K magnitude |
| _u | u magnitude if known |
| _uErr | Error on u magnitude |
| _g | g magnitude if known |
| _gErr | Error on g magnitude |
| _r | r magnitude if known |
| _rErr | Error on r magnitude |
| _i | i magnitude if known |
| _iErr | Error on i magnitude |
| _z | z magnitude if known |
| _zErr | Error on z magnitude |
| _y | y magnitude if known |
| _yErr | Error on y magnitude |
(The attributes below are not the full schema. For more documentation and full schema see
| objectId | Object ID for objects to which this candidate belongs (string) |
| candid | unique identifier for the subtraction candidate (integer) |
| jd | Observation Julian date at start of exposure |
| ra | Right Ascension of candidate; J2000 [deg] |
| decl | Declination of candidate; J2000 [deg] |
| magpsf | magnitude from PSF-fit photometry [mag] |
| sigmapsf | 1-sigma uncertainty in magpsf [mag] |
| chipsf | Reduced chi-square for PSF-fit |
| magap | Aperture mag using 8 pixel diameter aperture [mag] |
| sigmagap | 1-sigma uncertainty in magap [mag] |
| isdiffpos | t or 1 if candidate is from positive (sci minus ref) subtraction; f or 0 if candidate is from negative (ref minus sci) subtraction (string) |
| nid | Night ID, starts 2017-01-01 (integer) |
| field | ZTF field ID (integer) |
| xpos | x-image position of candidate [pixels] |
| ypos | y-image position of candidate [pixels] |
| distnr | distance to nearest source in reference image PSF-catalog within 30 arcsec [pixels] |
| magnr | magnitude of nearest source in reference image PSF-catalog within 30 arcsec [mag] |
| sigmagnr | 1-sigma uncertainty in magnr within 30 arcsec [mag] |
| sky | Local sky background estimate [DN] |
| magdiff | Difference: magap - magpsf [mag] |
| fwhm | Full Width Half Max assuming a Gaussian core, from SExtractor [pixels] |
| classtar | Star/Galaxy classification score from SExtractor (string) |
| elong | Ratio: aimage / bimage |
| nbad | number of prior-tagged bad pixels in a 5 x 5 pixel stamp (integer) |
| rb | RealBogus quality score; range is 0 to 1 where closer to 1 is more reliable |
| drb | RealBogus quality score from Deep-Learning-based classifier; range is 0 to 1 where closer to 1 is more reliable |
| drbversion | version of Deep-Learning-based classifier model used to assign RealBogus (drb) quality score |
| scorr | Peak-pixel signal-to-noise ratio in point source matched-filtered detection image
|
| Solar System |
| ssdistnr | distance to nearest known solar system object; set to -999.0 if none [arcsec] |
| ssmagnr | magnitude of nearest known solar system object (usually V-band from MPC archive); set to -999.0 if none [mag] |
| ssnamenr | name of nearest known solar system object (from MPC archive); ‘null’ if none (string) |
| Pan-STARRS |
| objectidps1 | Object ID of closest source from PS1 catalog; if exists within 30 arcsec |
| sgmag1 | g-band PSF magnitude of closest source from PS1 catalog; if exists within 30 arcsec [mag] |
| srmag1 | r-band PSF magnitude of closest source from PS1 catalog; if exists within 30 arcsec [mag] |
| simag1 | i-band PSF magnitude of closest source from PS1 catalog; if exists within 30 arcsec [mag] |
| szmag1 | z-band PSF magnitude of closest source from PS1 catalog; if exists within 30 arcsec [mag] |
| sgscore1 | Star/Galaxy score of closest source from PS1 catalog 0 <= sgscore <= 1 where closer to 1 implies higher likelihood of being a star |
| distpsnr1 | Distance of closest source from PS1 catalog; if exists within 30 arcsec [arcsec] |
| Gaia DR1 |
| neargaia | Distance to closest source from Gaia DR1 catalog irrespective of magnitude; if exists within 90 arcsec [arcsec] |
| neargaiabright | Distance to closest source from Gaia DR1 catalog brighter than magnitude 14; if exists within 90 arcsec [arcsec] |
| maggaia | Gaia (G-band) magnitude of closest source from Gaia DR1 catalog irrespective of magnitude; if exists within 90 arcsec [mag] |
| maggaiabright | Gaia (G-band) magnitude of closest source from Gaia DR1 catalog brighter than magnitude 14; if exists within 90 arcsec [mag] |
| Attributes added by Lasair |
| dc_mag | Computed apparent magnitude (see Note about Photometry in this page |
| dc_sigmag | Error in computed apparent magnitude (see Note about Photometry in this page |
| dc_mag_g02 | Exponential Moving Average of apparent magnitude in g band, with 2-day timescale (see note) |
| dc_mag_g08 | Exponential Moving Average of apparent magnitude in g band, with 8-day timescale (see note) |
| dc_mag_g28 | Exponential Moving Average of apparent magnitude in g band, with 28-day timescale (see note) |
| dc_mag_r02 | Exponential Moving Average of apparent magnitude in r band, with 2-day timescale (see note) |
| dc_mag_r08 | Exponential Moving Average of apparent magnitude in r band, with 8-day timescale (see note) |
| dc_mag_r28 | Exponential Moving Average of apparent magnitude in r band, with 28-day timescale (see note) |
