pgc

Principal Catalogue of Galaxies number.

objname

Object name in the HyperLEDA.

id_ned

Name in NED.

id_nedd

Name in NED-Distance Catalogue.

id_iras

Name in IRAS-RBGS, or in RIFSCz if in the form Fxxxxx+xxxx.

id_2mass

ID in 2MASS-LGA, 2MASS-XSC, or 2MASS-PSC (see `flag_2mass`).

sdss_photid

SDSS photometric ID (consistent with DR8 releases and later).

sdss_specid

SDSS spectroscopic ID (consistent with DR8 releases and later).

ra

Decimal right ascension J2000.0 (degrees).

dec

Decimal declination J2000.0 (degrees).

f_astrom

Astrometric precision flag:
-1 for ~0.1 arcsec, 0 for 1 arcsec, 1 for 10 arcsec, etc.

r1

D25 semi-major axis (arcmin).

r2

D25 semi-minor axis (arcmin).

pa

D25 positional angle, North-to-Northeast (degrees). 

rsource

Source of the galaxy-size information:
H=HyperLEDA, S=SDSS, 2=2MASS, 6=2dFGS, W=WINGS, Y=SkyMapper, A=Amiga-CIG, K=UNGC, V=VIII/77, 1=KKH2001, 7=KKH2007, N=NED.

rflag

Galaxy-size information flag:
0=missing, 1=all axes and positional angle defined, 2=r2 and/or pa were missing and they were set equal to r1 and 0 (circular isophote).

t

Numerical Hubble-type following the de Vaucouleurs et al. 1976 system.

e_t

Uncertainty on the numerical Hubble-type.

incl

Inclination (degrees).

v

Heliocentric radial velocity (km/s).

e_v

Uncertainty on the heliocentric radial velocity (km/s).

v_vir

Virgo-infall corrected radial velocity (km/s).

e_v_vir

Uncertainty on the Virgo-infall corrected radial velocity (km/s).

ndist

Number of redshift-independent measurements in NED-D used for the computation of the distance.

edist

If True, the NED-D distance measurements had uncertainties.

d

Distance (Mpc).

e_d

Uncertainty on the distance (Mpc).

d_lo68

Lower bound of the 68% confidence interval of the distance (Mpc).

d_hi68

Upper bound of the 68% confidence interval of the distance (Mpc).

d_lo95

Lower bound of the 95% confidence interval of the distance (Mpc).

d_hi95

Upper bound of the 95% confidence interval of the distance (Mpc).

dmethod

Method for the estimation of the distance:

N=using NED-D distance measurements, 

Z=regression, 

Zv=regression for Virgo Cluster members, 

C=distance from NED-D measurements but uncertainty from regression, Cv=distance from NED-D measurements but uncertainty from Virgo Cluster regressor.

ut

Total U-band apparent magnitude (mag).

bt

Total B-band apparent magnitude (mag).

vt

Total V-band apparent magnitude (mag).

it

Total I-band apparent magnitude (mag).

e_ut

Uncertainty on the total U-band apparent magnitude (mag).

e_bt

Uncertainty on the total B-band apparent magnitude (mag).

e_vt

Uncertainty on the total V-band apparent magnitude (mag).

e_it

Uncertainty on the total I-band apparent magnitude (mag).

ag

Galactic absorption in B-band (mag).

ai

Intrinsic absorption in B-band (mag).

s12

12μm-band flux from IRAS (Jy)

s25

25μm-band flux from IRAS (Jy)

s60

60μm-band flux from IRAS (Jy)

s100

100μm-band flux from IRAS (Jy)

q12

Quality flag for the 12μm-band flux from IRAS (Jy):

0=not in IRAS, 1=upper limit, 2=moderate, 3=high, 4=flux from IRAS-RBGS.

q25

Quality flag for the 25μm-band flux from IRAS (Jy):

0=not in IRAS, 1=upper limit, 2=moderate, 3=high, 4=flux from IRAS-RBGS.

q60

0=not in IRAS, Quality flag for the 60μm-band flux from IRAS (Jy):

0=not in IRAS, 1=upper limit, 2=moderate, 3=high, 4=flux from IRAS-RBGS.

q100

Quality flag for the 100μm-band flux from IRAS (Jy):

0=not in IRAS, 1=upper limit, 2=moderate, 3=high, 4=flux from IRAS-RBGS.

wf1

3.3μm-band (W1) apparent magnitude in the WISE forced photometry catalog (mag).

wf2

4.6μm-band (W2) apparent magnitude in the WISE forced photometry catalog (mag).

wf3

12μm-band (W3) apparent magnitude in the WISE forced photometry catalog (mag).

wf4

22μm-band (W4) apparent magnitude in the WISE forced photometry catalog (mag).

e_wf1

Uncertainty on the 3.3μm-band (W1) apparent magnitude in the WISE forced photometry catalog (mag).

e_wf2

Uncertainty on the 4.6μm-band (W2) apparent magnitude in the WISE forced photometry catalog (mag).

e_wf3

Uncertainty on the 12μm-band (W3) apparent magnitude in the WISE forced photometry catalog (mag).

e_wf4

Uncertainty on the 22μm-band (W4) apparent magnitude in the WISE forced photometry catalog (mag).

wfpoint

True if point source in the WISE forced photometry catalog.

wftreat

True if treated as point source in the WISE forced photometry catalog.

j

J-band apparent magnitude in 2MASS (mag).

h

H-band apparent magnitude in 2MASS (mag).

k

J-band apparent magnitude in 2MASS (mag).

e_j

Uncertainty on the J-band apparent magnitude in 2MASS (mag).

e_h

Uncertainty on the H-band apparent magnitude in 2MASS (mag).

e_k

Uncertainty on the K-band apparent magnitude in 2MASS (mag).

flag_2mass

Source of the 2MASS ID and magnitudes:

0=none, 1=LGA, 2=XSC, 3=PSC.

u

u-band SDSS apparent magnitude (mag).

g

g-band SDSS apparent magnitude (mag).

r

r-band SDSS apparent magnitude (mag).

i

i-band SDSS apparent magnitude (mag).

z

z-band SDSS apparent magnitude (mag).

e_u

Uncertainty on the u-band SDSS apparent magnitude (mag).

e_g

Uncertainty on the g-band SDSS apparent magnitude (mag).

e_r

Uncertainty on the r-band SDSS apparent magnitude (mag).

e_i

Uncertainty on the i-band SDSS apparent magnitude (mag).

e_z

Uncertainty on the z-band SDSS apparent magnitude (mag).

logL_TIR

Decimal logarithm of the total-infrared (TIR) luminosity in solar luminosities (3.83x10³³ erg/s)

logL_FIR

Decimal logarithm of the far-infrared (FIR) luminosity in solar luminosities.

logL_60μ

Decimal logarithm of the 60um-band luminosity in solar luminosities.

logL_12μ

Decimal logarithm of the 12um-band luminosity in solar luminosities.

logL_22μ

Decimal logarithm of the 22um-band luminosity in solar luminosities.

logL_K

Decimal logarithm of the K-band luminosity in solar luminosities.

ML_ratio

Mass-to-light ratio for the 2MASS K-band using SDSS g-r colour (Bell et al. 2003).

logSFR_TIR

Decimal logarithm of the TIR-based star-formation rate in solar masses per year.

logSFR_FIR

Decimal logarithm of the FIR-based star-formation rate in solar masses per year.

logSFR_60u

Decimal logarithm of the 60um-based star-formation rate in solar masses per year.

logSFR_12u

Decimal logarithm of the 12um-based star-formation rate in solar masses per year.

logSFR_22u

Decimal logarithm of the 22um-based star-formation rate in solar masses per year.

logSFR_HEC

Decimal logarithm of the homogenised star-formation rate in solar masses per year.

SFR_HEC_flag

Flag indicating the source of the photometry and the SFR indicator used in the homogenised SFR:

RT=IRAS-RBGS photometry and TIR indicator.

FT=RIFSCz photometry and TIR indicator.

FF=RIFSCz photometry and FIR indicator.

W3=WISE W3-band forced photometry and indicator.

W4=WISE W4-band forced photometry and indicator.

logM_HEC

Decimal logarithm of the total stellar mass in solar masses.

logSFR_GSW

Decimal logarithm of the SED-based star-formation rate from the GSWLC-2 in solar masses per year.

logM_GSW

Decimal logarithm of the SED-based stellar mass from the GSWLC-2 in solar masses.

min_snr

Minimum signal-to-noise ratio of the emission lines used for the activity classification (class_sp).

metal

12+log(O/H) gas-phase metallicity.

flag_metal

Metallicity flag:

-1=missing

0=reliable

1=O3N2 ratio >2 (outside the PP04 range)

2=low signal-to-noise ratio (<3 for the weakest line).

class_sp

Nuclear activity classification using the method in Stampoulis et al. 2019:
0=star-forming, 1=Seyfert, 2=LINER, 3=composite, -1=unknown.

agn_s17

AGN classification in She et al. 2017:
Y=AGN, N=non-AGN, ?=unknown

agn_hec

Adopted activity classification based on the combination of class_sp and agn_s17: Y=AGN, N=non-AGN, ?=unknown