Table information for 'maclega.main'

General

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Resource Description: We present a sample of 317,018 galaxies at the redshifts 0.003 < z < 0.1 from SDSS DR9. We arrived at the current selection by limiting z as computed by SDSS, filtering out non-galaxy objects, and finally checking for faulty and duplicate objects. This yielded 724,000 objects. Further cleaning steps included removal of quasars and star-like objects, removal of duplicate images using the SDSS DR9 Image List Tool as well as proprietary code. By visual inspection, we selected the best image of each galaxy, which led to a sample of about 360,000 galaxies. Using the SDSS recommendation to avoid typical statistical errors near the spectroscopic flux limit we restricted the sample by stellar magnitude in r-band (modelMag_r < 17.7).

For a list of all services and tables belonging to this table's resource, see Information on resource 'A Manually Cleaned List of Nearby Galaxies from SDSS DR9'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2013OAP...26..187D either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:maclega_main,
  year=2018,
  title={A Manually Cleaned List of Nearby Galaxies from {SDSS} DR9},
  author={Dobrycheva, D.},
  url={http://dc.zah.uni-heidelberg.de/tableinfo/maclega.main},
  howpublished={{VO} resource provided by the {GAVO} Data Center}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
id Id Main identifier for this object; this is the objID column from SDSS DR9's photoTag table N/A meta.id;meta.main
ra Ra ICRS right ascension for this object from SDSS N/A pos.eq.ra;meta.main
dec Dec ICRS declination for this object from SDSS N/A pos.eq.dec;meta.main
dl Lum. Dist. Luminosity distance. This was calculated it with the LUMDIST program. [Note ld] Mpc phys.distance
z z Redshift taken from SDSS N/A src.redshift
abs_mr M_r Absolute stellar magnitude in the SDSS r band, calculated as Mr = modelMag_r - 5*log10(DL) - 25 - Extinction_r - kcorrect_r, where modelMag_r - the model magnitudes in a r-band; DL - luminosity distance; Extinction_r - Galactic extinction in r-band; kcorrect_r - k- correction in r-band. mag phys.magabs
morph Morph. Morphological type, E, S, or I [Note m] N/A src.morph.type
modelmag_u m_u Model magnitude in the u band from SDSS DR9 mag phot.mag;em.opt.U
ext_u Ext. u Extinction in the u band following 1998wfsc.conf..297S, taken from SDSS DR9. mag phys.absorption;em.opt.U
kcorrect_u TBD TBD N/A TBD
modelmag_g m_g Model magnitude in the g band from SDSS DR9 mag phot.mag;em.opt.V
ext_g Ext. g Extinction in the g band following 1998wfsc.conf..297S, taken from SDSS DR9. mag phys.absorption;em.opt.V
kcorrect_g TBD TBD N/A TBD
modelmag_r m_r Model magnitude in the r band from SDSS DR9 mag phot.mag;em.opt.R
ext_r Ext. r Extinction in the r band following 1998wfsc.conf..297S, taken from SDSS DR9. mag phys.absorption;em.opt.R
kcorrect_r TBD TBD N/A TBD
modelmag_i m_i Model magnitude in the i band from SDSS DR9 mag phot.mag;em.opt.I
ext_i Ext. i Extinction in the i band following 1998wfsc.conf..297S, taken from SDSS DR9. mag phys.absorption;em.opt.I
kcorrect_i TBD TBD N/A TBD
modelmag_z m_z Model magnitude in the z band from SDSS DR9 mag phot.mag;em.opt.I
ext_z Ext. z Extinction in the z band following 1998wfsc.conf..297S, taken from SDSS DR9. mag phys.absorption;em.opt.I
kcorrect_z TBD TBD N/A TBD
petror50_r R_50 Radius containing 50% of the Petrosian flux in the r-band. arcsec phys.angsize;src
petror90_r R_90 Radius containing 90% of the Petrosian flux in the r-band. arcsec phys.angsize;src

Columns that are parts of indices are marked like this.

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Notes