VizieR

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Simple Target List Of Targets Fast Xmatch with large catalogs or Simbad

Target Name (resolved by Sesame) or Position:	Target dimension:
NB: The epoch used for the query is the original epoch of the table(s)	Radius Box size

	J/ApJS/269/3	56870		Siena Galaxy Atlas 2020 (SGA-2020) (Moustakas+, 2023) ReadMe+ftp 2023ApJS..269....3M Similar Catalogs acknowledge and cite the SGA-2020 data products Post annotation
1.	J/ApJS/269/3/sga2020		Ellipse-fitting results (original column names in green) (383620 rows) metaJ/ApJS/269/3/sga2020

Simple Constraint List Of Constraints

Query by Constraints constraints help

applied on Columns (Output Order: + - )

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Column

Constraint

Explain (UCD)

recno

Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

[2/5005247] SGA unique identification number (SGA_ID) (meta.id;meta.main)

Name

(char)

Unique galaxy name (GALAXY) (meta.id)

PGC

⁽ⁿ⁾ [1/6740716] Unique identifier from the Principal Catalogue of Galaxies (Paturel+ 1989, VII/119 ; obsoleted by VII/237) (PGC) (meta.id)

RALdeg

deg

Right ascension (J2000) from the reference indicated in Ref (RA_LEDA) (pos.eq.ra)

DELdeg

deg

Declination (J2000) from the reference indicated in Ref (DEC_LEDA) (pos.eq.dec)

MType

(char)

Visual morphological type from HyperLeda (if available) (MORPHTYPE) (src.morph.type)

PA-LEDA

deg

Galaxy position angle (measured east of north); taken from the reference indicated in Ref (PA_LEDA) (pos.posAng)

D25-LEDA

arcmin

[0.16/63] Major-axis diameter at the 25mag/arcsec² (optical) surface-brightness isophote; taken from the reference indicated in Ref (D25_LEDA) (phys.angSize)

b/a-LEDA

[0.03/1] Ratio of the semiminor axis to the semimajor axis; taken from the reference indicated in Ref (BA_LEDA) (phys.size.axisRatio)

z-LEDA

⁽ⁿ⁾ [-0.003/4.4] Heliocentric redshift from HyperLeda; a NULL value does not imply that no redshift exists (Z_LEDA) (src.redshift)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

SBD25-LEDA

mag/arcsec2

[14.5/31.7] Mean surface brightness based on D25-LEDA and mag-LEDA (SB_D25_LEDA) (phot.mag.sb)

mag-LEDA

mag

[6.3/25] Apparent b_t-band Vega magnitude (MAG_LEDA) (Note 1) (phot.mag;em.opt.B)

ByHand

[0/1] Boolean flag indicating whether one or more of RALdeg, DELdeg, D25-LEDA, PA-LEDA, b/a-LEDA, or mag-LEDA were changed from their published values (usually via visual inspection) while building the parent sample (meta.code)

Ref

(char)

Reference indicating the origin of the object (REF) (Note 2) (meta.ref;pos.frame)

GroupID

[0/531676] Unique group identification number (GROUP_ID) (meta.id)

Group

(char)

Group name, constructed from the name of its largest member (see Section 2.2). For isolated galaxies, identical to Name (GROUP_NAME) (meta.id.parent)

[1/13] Number of group members (i.e., group multiplicity) (GROUP_MULT) (meta.number)

Prim

[0/1] Boolean flag indicating the primary (i.e., largest) group member (GROUP_PRIMARY) (meta.code)

RAGdeg

deg

Mean R.A. of the group weighted by D25-LEDA (GROUP_RA) (pos.eq.ra)

DEGdeg

deg

Mean decl. of the group weighted by D25-LEDA (GROUP_DEC) (pos.eq.dec)

GrDiam

arcmin

[0.16/63] Approximate group diameter (see Section 2.2) (GROUP_DIAMETER) (phys.angSize;pos.lg)

BrickName

(char)

Name of custom Tractor "brick," encoding the sky position (e.g., "1126p222" is centered on RA=112.6,DE=+22.2) (BRICKNAME) (meta.id)

RAJ2000

deg

⁽ⁱ⁾ Right ascension (J2000) based on The Tractor model fit (RA) (pos.eq.ra;meta.main)

ALL cols

⁽ⁿ⁾ indicates a possible blank or NULL column

⁽ⁱ⁾indexed column

DEJ2000

deg

⁽ⁱ⁾ Declination (J2000) based on The Tractor model fit (DEC) (pos.eq.dec;meta.main)

D26

arcmin

[0.06/78] Major axis diameter at the µ=26mag/arcsec² r-band isophote (D26) (phys.angSize)

r_D26

(char)

Reference indicating the origin of the DIAM measurement: SB26, SB25, or LEDA (D26_REF) (Note 3) (meta.ref;pos.frame)

deg

Galaxy position angle (measured east of north), as measured from the ellipse moments (see Section 3.2.3); equivalent to PA-LEDA if the ellipse moments could not be measured (PA) (pos.posAng)

b/a

[0.06/1] Minor-to-major axis ratio, as measured from the ellipse moments; equivalent to b/a-LEDA if the ellipse moments could not be measured (BA) (phys.size.axisRatio)

RAMdeg

deg

Light-weighted R.A. (J2000), as measured from the ellipse moments (RA_MOMENT) (Note 4) (pos.eq.ra)

DEMdeg

deg

Light-weighted decl. (J2000), as measured from the ellipse moments (DEC_MOMENT) (Note 4) (pos.eq.dec)

SMA-Moment

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