SDSS Data Release 9 (catalogs.sdssdr9)
The table has 469029920 rows, 20 columns.
Description
Data Release 9 of the SDSS project. More information about the catalog is available here.
This table is cross-matched with Gaia DR2 gaia_source table through gaiadr2.sdssdr9_best_neighbour reference table.
Columns
| Name | Type | UCD | Unit | Description |
|---|---|---|---|---|
| sdssdr9_oid | int | meta.id |
Incremental integer identifier added for the purpose of cross referencing |
|
| obj_id | char | meta.id |
SDSS unique object identifier |
|
| thing_id | long | meta.id |
SDSS unique source identifier |
|
| ra | double | pos.eq.ra | Angle[deg] |
Right Ascension of the object (ICRS) |
| dec | double | pos.eq.dec | Angle[deg] |
Declination of the object (ICRS) |
| ra_error | double |
stat.error pos.eq.ra |
Angle[arcsec] |
Mean error on right ascension |
| dec_error | double |
stat.error pos.eq.dec |
Angle[arcsec] |
Mean error on declination |
| mjd | double | time.epoch | Time[day] |
Modified Julian Date of observation |
| u_mag | float | phot.mag | Magnitude[mag] |
Model magnitude in u filter |
| u_mag_error | float |
stat.error phot.mag |
Magnitude[mag] |
Mean error on u_mag |
| g_mag | float | phot.mag | Magnitude[mag] |
Model magnitude in g filter |
| g_mag_error | float |
stat.error phot.mag |
Magnitude[mag] |
Mean error on g_mag |
| r_mag | float | phot.mag | Magnitude[mag] |
Model magnitude in r filter |
| r_mag_error | float |
stat.error phot.mag |
Magnitude[mag] |
Mean error on r_mag |
| i_mag | float | phot.mag | Magnitude[mag] |
Model magnitude in i filter |
| i_mag_error | float |
stat.error phot.mag |
Magnitude[mag] |
Mean error on i_mag |
| z_mag | float | phot.mag | Magnitude[mag] |
Model magnitude in z filter |
| z_mag_error | float |
stat.error phot.mag |
Magnitude[mag] |
Mean error on z_mag |
| objc_type | int | meta.code.class |
Type of object (galaxy=3, star=6) |
|
| clean_flag | int | meta.code.qual |
Clean photometry flag (clean,=1 unclean=0) |