Archives of Photographic PLates for Astronomical USE

Extracted sources (applause_dr3.source)

Description

This is the main table of extracted sources. A row in the source table corresponds to an extracted source from a plate scan. The table contains extracted (instrumental) values provided by the SExtractor software. Calibrated data, like sky coordinates, are stored in the source_calib table. Unique Identifier source_id

Attribution

If you have made substantial use of the data provided by APPLAUSE DR3, 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.

Columns

Name Type UCD Unit Description
source_id long meta.id
meta.main
Source identification number. The number is constructed as follows: process_id x 10000000 + source number in the image.
process_id int meta.id Process identification number
scan_id int meta.id Scan identification number
exposure_id int meta.id Exposure identification number
plate_id int meta.id Plate identification number
archive_id int meta.id Archive identification number
source_num int meta.number Source number within the image
x_source double pos.cartesian.x Source coordinate along x-axis
y_source double pos.cartesian.y Source coordinate along y-axis
a_source float phys.size.smajAxis pix Semi-major axis length of the source
b_source float phys.size.sminAxis pix Semi-minor axis length of the source
theta_source float pos.posAng deg Position angle
erra_source float stat.error
phys.size.smajAxis
pix Uncertainty on the semi-major axis length
errb_source float stat.error
phys.size.sminAxis
pix Uncertainty on the semi-minor axis length
errtheta_source float stat.error
pos.posAng
deg Uncertainty on the position angle
elongation float phys.size.axisRatio Source elongation (a_source / b_source)
x_peak int pos.cartesian.x Source peak (brightest pixel) coordinate along x-axis
y_peak int pos.cartesian.y Source peak (brightest pixel) coordinate along y-axis
flag_usepsf short meta.code 1 if source position has been determined by PSF fitting, 0 if barycenter has been used
x_image double pos.cartesian.x Source barycenter coordinate along x-axis
y_image double pos.cartesian.y Source barycenter coordinate along y-axis
erra_image float stat.error
phys.size.smajAxis
pix Uncertainty on the semi-major axis length (barycenter method)
errb_image float stat.error
phys.size.sminAxis
pix Uncertainty on the semi-minor axis length (barycenter method)
errtheta_image float stat.error
pos.posAng
deg Uncertainty on the position angle (barycenter method)
x_psf double pos.cartesian.x Source coordinate along x-axis, determined by PSF fitting
y_psf double pos.cartesian.y Source coordinate along y-axis, determined by PSF fitting
erra_psf float stat.error
phys.size.smajAxis
pix Uncertainty on the semi-major axis length (PSF fitting)
errb_psf float stat.error
phys.size.sminAxis
pix Uncertainty on the semi-minor axis length (PSF fitting)
errtheta_psf float stat.error
pos.posAng
deg Uncertainty on the position angle (PSF fitting)
mag_auto float phot.mag mag Kron-like elliptical aperture magnitude
magerr_auto float stat.error
phot.mag
mag Error for mag_auto
flux_auto float phot.count Flux within a Kron-like elliptical aperture
fluxerr_auto float stat.error
phot.count
Error for flux_auto
mag_iso float phot.mag mag Isophotal magnitude
magerr_iso float stat.error
phot.mag
mag Error for isophotal magnitude
flux_iso float phot.count Isophotal flux
fluxerr_iso float stat.error
phot.count
Error for isophotal flux
flux_max float phot.count Peak flux above background
flux_radius float stat.value pix Fraction-of-light radius
isoarea int stat.value pix2 Isophotal area above threshold
sqrt_isoarea float stat.value pix Square root of the isophotal area above threshold
background float stat.value Background value
sextractor_flags short meta.code Flags given by SExtractor
dist_center double pos.distance pix Distance of the source from plate center
dist_edge double pos.distance pix Distance of the source from plate edge
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)
flag_rim short meta.code 1 if source is found to be at plate rim, 0 otherwise
flag_negradius short meta.code 1 if flux_radius is negative, 0 otherwise
flag_clean short meta.code 1 if source is not at the rim, flux_radius is not negative, and elongation < 5, 0 otherwise
timestamp_insert timestamp time.creation Time[yyyy-mm-dd hh:mm:ss] Timestamp of insert
timestamp_update timestamp time.creation Time[yyyy-mm-dd hh:mm:ss] Timestamp of last update