Archives of Photographic PLates for Astronomical USE

Extracted sources with calibrated positions and magnitudes (applause_dr4.source_calib)

The table has 4028101537 rows, 49 columns.

Description

Sources with calibrated magnitudes by pyplate. For calibration a crossmatch of UCAC4 and APASS was used. Catalog identifiers are given, together with match quality indicators, when a match in those cataclogs has been indentified. The magnitude calibration uses the values of the phot_* tables. Unique Identifier source_id

Attribution

If you have made substantial use of the data provided by APPLAUSE DR4, kindly include this acknowledgement

Funding for APPLAUSE has been provided by DFG (German Research Foundation, Grant), Leibniz Institute for Astrophysics Potsdam (AIP), Dr. Remeis Sternwarte Bamberg (University Nürnberg/Erlangen), the Hamburger Sternwarte (University of Hamburg) and Tartu Observatory. Plate material also has been made available from Thüringer Landessternwarte Tautenburg, and from the archives of the Vatican Observatory.

Columns

Name Type UCD Unit Description
source_id long meta.id
meta.main
Source identification number. The number is constructed as follows: 4 x 10^13 + process_id x 10^7 + source number in the image.
process_id int meta.id Process identification number
scan_id int meta.id Scan identification number
plate_id int meta.id Plate identification number
archive_id int meta.id Archive identification number
solution_num short meta.number Solution number within the process
annular_bin short meta.code Annular bin (1-9) where the source belongs (bin 1 is in the center, bin 9 is at the edge)
dist_center double pos.distance px Distance of the source from plate center
dist_edge double pos.distance px Distance of the source from plate edge
sextractor_flags short meta.code Flags given by SExtractor
model_prediction float stat.likelihood Classification of the source as celestial (value close to 1) or artifact (value close to 0). The value is a prediction by a machine-learning algorithm.
ra_icrs double pos.eq.ra Right ascension of the source (International Celestial Reference System)
dec_icrs double pos.eq.dec Declination of the source (International Celestial Reference System)
ra_error float stat.error
pos.eq.ra
arcsec Error of the right ascension
dec_error float stat.error
pos.eq.dec
arcsec Error of the declination
gal_lon double pos.galactic.lon Galactic longitude of the source
gal_lat double pos.galactic.lat Galactic latitude of the source
ecl_lon double Ecliptic longitude of the source
ecl_lat double Ecliptic latitude of the source
x_sphere double pos.cartesian.x Source x-coordinate on the unit sphere
y_sphere double pos.cartesian.y Source y-coordinate on the unit sphere
z_sphere double pos.cartesian.z Source z-coordinate on the unit sphere
healpix256 int pos.healpix Source HEALPix number (nside=256, nested ordering)
healpix1024 int pos.healpix Source HEALPix number (nside=1024, nested ordering)
nn_dist float pos.angDistance arcsec Distance to the nearest neighbor among extracted sources
zenith_angle float pos.az.zd deg Zenith angle of the source
airmass float obs.airMass Air mass (path length for light rays from a celestial source to pass through the atmosphere)
natmag float phot.mag
em.opt
mag Calibrated magnitude of the source in the plate natural photometric system
natmag_error float stat.error
phot.mag
em.opt
Error estimate of the magnitude in the plate natural photometric system
bpmag float Calibrated magnitude of the source in the Gaia EDR3 BP (blue) passband
bpmag_error float Error estimate of the calibrated BP magnitude
rpmag float Calibrated magnitude of the source in the Gaia EDR3 RP (red) passband
rpmag_error float Error estimate of the calibrated RP magnitude
natmag_plate float phot.mag
em.opt
mag Magnitude of the source in the plate natural photometric system, obtained through photometric calibration for the whole plate, without corrections
natmag_correction float phot.mag
em.opt
arith.diff
mag Correction applied to the source magnitude in the plate natural photometric system
natmag_residual float phot.mag
em.opt
arith.diff
mag Residual of the source magnitude in the plate natural photometric system after corrections, compared to the synthetic magnitude constructed from Gaia EDR3 photometry
phot_range_flags short Photometric range flags: 0 - source natmag is in the range of calibration stars; 1 - source natmag is brighter than the brightest calibration star; 2 - source natmag is fainter than the estimated faint limit of the plate
phot_calib_flags short meta.code Flag for photometric calibration stars: 0 - source is not a calibration star; 1 - source is a valid calibration star; 2 - source was found to be an outlier of the photometric calibration curve
color_term float stat.fit.param Color term of the plate, characterizing color response of the emulsion and filter used. Color term 0 corresponds to the Gaia EDR3 RP passband, color term 1 corresponds to the BP passband. Values outside the 0...1 range are extrapolations.
cat_natmag float phot.mag
em.opt
mag Magnitude of the source in the plate natural photometric system, RP+color_term×(BP-RP), based on the Gaia EDR3 catalogue
gaiaedr3_gmag float Gaia EDR3 G-magnitude of the matched source
gaiaedr3_id long Gaia EDR3 source_id of the matched source
gaiaedr3_bp_rp float Gaia EDR3 BP-RP color index of the matched source
gaiaedr3_dist float arcsec Angular distance in the sky plane between the source and the matched Gaia EDR3 source
gaiaedr3_neighbors int Number of Gaia EDR3 sources that are in the neighborhood of the source. The neighboring sources can be found in the source_xmatch table.
match_radius float pos.angDistance arcsec Radius in the sky plane that was used to cross-match extracted sources with the Gaia EDR3 catalogue
timestamp_insert char time.creation Time[yyyy-mm-dd hh:mm:ss] Timestamp of insert
timestamp_update char time.creation Time[yyyy-mm-dd hh:mm:ss] Timestamp of last update
pos char meta.number (radians,radians) GIS index for (ra,dec)