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Resource Description:
For a list of all services and tables belonging to this table's resource, see Information on resource 'SDSS DR16 Selection'
This table has an associated publication. If you use data from it, it may be appropriate to reference 2020ApJS..249....3A (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.
To cite the table as such, we suggest the following BibTeX entry:
@MISC{vo:sdssdr16_main, year=2022, title={{SDSS} DR16 Selection}, author={humada, Romina and Prieto, Carlos Allende and Almeida, Andrés and Anders, Friedrich and Anderson, Scott F. and Andrews, Brett H. and Anguiano, Borja and Arcodia, Riccardo and Armengaud, Eric and Aubert, Marie and Avila, Santiago and Avila-Reese, Vladimir and Badenes, Carles and Balland, Christophe and Barger, Kat and Barrera-Ballesteros, Jorge K. and Basu, Sarbani and Bautista, Julian and Beaton, Rachael L. and Beers, Timothy C. and Benavides, B. Izamar T. and Bender, Chad F. and Bernardi, Mariangela and Bershady, Matthew and Beutler, Florian and Bidin, Christian Moni and Bird, Jonathan and Bizyaev, Dmitry and Blanc, Guillermo A. and Blanton, Michael R. and Boquien, Médéric and Borissova, Jura and Bovy, Jo and Brandt, W. N. and Brinkmann, Jonathan and Brownstein, Joel R. and Bundy, Kevin and Bureau, Martin and Burgasser, Adam and Burtin, Etienne and Cano-Díaz, Mariana and Capasso, Raffaella and Cappellari, Michele and Carrera, Ricardo and Chabanier, Solène and Chaplin, William and Chapman, Michael and Cherinka, Brian and Chiappini, Cristina and Doohyun Choi, Peter and et al}, url={http://dc.zah.uni-heidelberg.de/tableinfo/sdssdr16.main}, howpublished={{VO} resource provided by the {GAVO} Data Center} }
Please see http://www.sdss.org/collaboration/citing-sdss/ for the authors' requests on how to cite this material.
Sorted by DB column index. [Sort alphabetically]
Name | Table Head | Description | Unit | UCD |
---|---|---|---|---|
obj_id | Obj_id | SDSS unique object identifier [Note 1] | N/A | meta.id;meta.main |
ra | Ra | Right Ascension of the object (ICRS) | deg | pos.eq.ra;meta.main |
dec | Dec | Declination of the object (ICRS) | deg | pos.eq.dec;meta.main |
ra_err | Ra_err | Mean error on ra | arcsec | stat.error;pos.eq.ra |
dec_err | Dec_err | Mean error on dec | arcsec | stat.error;pos.eq.dec |
pm_ra | Pm_ra | Proper motion along Right Ascension [Note 11] | mas/yr | pos.pm;pos.eq.ra |
e_pm_ra | E_pm_ra | Mean error on pmra [Note 11] | mas/yr | stat.error;pos.pm;pos.eq.ra |
pm_dec | Pm_dec | Proper motion along Declination [Note 11] | mas/yr | pos.pm;pos.eq.dec |
pm_dec_err | Pm_dec_err | Mean error on pmDE. | mas/yr | stat.error;pos.pm;pos.eq.dec |
pm_sig_ra | Pm_sig_ra | RMS residual of proper motion fit in RA. [Note 11] | mas | stat.fit.residual |
pm_sig_dec | Pm_sig_dec | RMS residual of proper motion fit in Dec. | mas | stat.fit.residual |
u | U | Model magnitude in u filter AB scale [Note 7] | mag | phot.mag;em.opt.u |
err_u | Err_u | Error in the model magnitude in u filter AB scale | mag | stat.error;phot.mag;em.opt.u |
g | G | Model magnitude in g filter AB scale [Note 7] | mag | phot.mag;em.opt.v |
err_g | Err_g | Error in the model magnitude in g filter AB scale | mag | stat.error;phot.mag;em.opt.v |
r | R | Model magnitude in r filter AB scale [Note 7] | mag | phot.mag;em.opt.r |
err_r | Err_r | Error in the model magnitude in r filter AB scale | mag | stat.error;phot.mag;em.opt.r |
i | I | Model magnitude in i filter AB scale [Note 7] | mag | phot.mag;em.opt.i |
err_i | Err_i | Error in the model magnitude in i filter AB scale | mag | stat.error;phot.mag;em.opt.i |
z | Z | Model magnitude in z filter AB scale [Note 7] | mag | phot.mag;em.opt.i |
err_z | Err_z | Error in the model magnitude in z filter AB scale | mag | stat.error;phot.mag;em.opt.i |
field_id | Field_id | The field this object is in. | N/A | meta.note |
mode | Mode | Photo mode (1=primary, 2=secondary, 3=family, 4=outside) | N/A | meta.code.class |
class | Class | Type of object (3=galaxy, 6=star) [Note 2] | N/A | src.class |
clean | Clean | Clean photometry flag (1=clean; 0=unclean) | N/A | meta.code |
photo_flags | Photo_flags | Photo Object Attribute flags [Note 3] | N/A | meta.code.error |
psfmags | Psfmags | Array of PSF magnitudes, in ugriz sequence [Note 4] | mag | phot.mag |
psfmag_errs | Psfmag_errs | Array of the errors of the PSF magnitudes, in ubriz sequence | mag | stat.error;phot.mag |
petmags | Petmags | Array of Petrosian magnitudes, in ugriz sequence [Note 4] | mag | phot.mag |
petmag_errs | Petmag_errs | Array of the errors Petrosian magnitudes, in ugriz sequence | mag | stat.error;phot.mag |
petrads | Petrads | Array of Petrosian radii, in ugriz sequence | arcsec | phys.angSize;src |
petrad_errs | Petrad_errs | Array of Petrosian radii, in ugriz sequence | arcsec | stat.error;phys.angSize;src |
dev_rads | Dev_rads | Array of de Vaucouleurs fit radii, in ugriz sequence | arcsec | phys.angSize;src |
dev_abs | Dev_abs | Array of de Vaucouleurs fit b/a ratios, in ugriz sequence | N/A | phys.size.axisRatio |
dev_phi | Dev_phi | Array of position angles of de Vaucouleurs fits in ugriz sequence (warning: anything smaller than 0 in here must be considered NULL). | deg | pos.posAng |
flags | Flags | Array of detection flags, in ugriz sequence [Note 3] | N/A | meta.code |
types | Types | Array of phototypes (6=Star ; 3=galaxy) in ugriz sequence [Note 2] | N/A | src.class.starGalaxy |
parent_id | Parent_id | Pointer to parent (if object deblended) | N/A | meta.id.parent |
spec_z | Spec_z | Spectroscopic final redshift (when SpObjID>0) [Note 6] | N/A | src.redshift |
spec_z_err | Spec_z_err | Mean error on spec_z (negative for bad fit) [Note 6] | N/A | stat.error |
spec_z_warning | Spec_z_warning | Warning flag on redshift. [Note 9] | N/A | meta.code |
spec_class | Spec_class | Spectroscopic class: "GALAXY"; "QSO"; "STAR" [Note 6] | N/A | meta.code.class;pos.parallax.spect |
spec_sub_class | Spec_sub_class | Spectroscopic subclass. [Note 10] | N/A | src.class |
spec_vel_disp | Spec_vel_disp | Velocity dispersion [Note 6] | km/s | phys.veloc.dispersion |
spec_vel_disp_err | Spec_vel_disp_err | Mean error on spec_vel_disp [Note 6] | km/s | stat.error |
spec_sn_median | Spec_sn_median | Median signal-to-noise over all good pixels. [Note 6] | N/A | em.wl.central;stat.median |
photoz_z | Photoz_z | Photometric redshift estimated by robust fit to nearest neighbors in a reference set [Note 12] | N/A | src.redshift |
photoz_z_err | Photoz_z_err | Estimated error of the photometric redshift [Note 12] | N/A | stat.error;src.redshift |
photoz_nn_avg_z | Photoz_nn_avg_z | Average redshift of the nearest neighbors; if significantly different from photoz_z this might be a better estimate than photoz_z | N/A | src.redshift.phot |
photoz_chisq | Photoz_chisq | Chi-square value for the minimum chi-square template fit [Note 12] | N/A | stat.value |
field_quality | Field_quality | Quality of the observation: 1=bad; 2=barely acceptable; 3=good [Note 13] | N/A | meta.code.qual;obs.param;obs |
field_mjds | Field_mjds | Array of dates of observation per ugriz band [Note 13] | d | time.epoch |
sdss_id | Sdss_id | SDSS object identifier (run-rerun-camcol-field-object) [Note 1] | N/A | meta.id |
spectral_id | Spectral_id | Spectroscopic Plate-MJD-Fiber identifier (plate-mjd-fiberID) | N/A | meta.id |
Columns that are parts of indices are marked like this.
VO nerds may sometimes need VOResource XML for this table.