J/MNRAS/511/3063 PS1 edge-on Galaxies catalog (Makarov+, 2022)
The edge-on Galaxies in the Pan-STARRS survey (EGIPS).
Makarov D., Savchenko S., Mosenkov A., Bizyaev D., Reshetnikov V.,
Antipova A., Tikhonenko I., Usachev P., Borisov S., Makarova L.,
Kautsch S., Marchuk A., Rubtsov E.
<Mon. Not. R. Astron. Soc. 511, 3063-3075 (2022)>
=2022MNRAS.511.3063M 2022MNRAS.511.3063M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Selected areas ; Cross identifications ;
Galaxies, photometry ; Optical ; Infrared ; Positional data ;
Extinction ; Rotational velocities ; Spectroscopy ; Redshifts ;
Velocity dispersion ; Photometry, Kron ; Galaxies, radius ;
Morphology
Keywords: astronomical data bases - catalogues - galaxies: photometry -
galaxies: statistics
Abstract:
We present a catalogue of 16551 edge-on galaxies created using the
public DR2 data of the Pan-STARRS survey. The catalogue covers the
three quarters of the sky above Dec. = -30°. The galaxies were
selected using a convolutional neural network, trained on a sample of
edge-on galaxies identified earlier in the SDSS survey. This approach
allows us to dramatically improve the quality of the candidate
selection and perform a thorough visual inspection in a reasonable
amount of time. The catalogue provides homogeneous information on
astrometry, SEXTRACTOR photometry, and non-parametric morphological
statistics of the galaxies. The photometry is reliably for objects in
the 13.8-17.4 r-band magnitude range. According to the HyperLeda data
base, redshifts are known for about 63 per cent of the galaxies in the
catalogue. Our sample is well separated into the red sequence and blue
cloud galaxy populations. The edge-on galaxies of the red sequence are
systematically Δ(g-i) ≃ 0.1 mag redder than galaxies oriented
at an arbitrary angle to the observer. We found a variation of the
galaxy thickness with the galaxy colour. The red sequence galaxies are
thicker than the galaxies of the blue cloud. In the blue cloud, on
average, thinner galaxies turn out to be bluer. In the future, based
on this catalogue it is intended to explore the three-dimensional
structure of galaxies of different morphologies, as well as to study
the scaling relations for discs and bulges.
Description:
In this work, we set catalog of 16551 Edge-on Galaxies in the
Panoramic Survey Telescope and Rapid Response System (Pan-STARRS)
survey (EGIPS). The EGIPS candidates were selected by a Convolutional
Neural Network (CNN) followed by an accurate visual inspection made by
well-experienced professional astronomers. Our catalogue provides
information on positions, photometric, and morphological parameters of
the edge-on galaxies, and cross-identification with the HyperLeda and
RCSED data bases. For our analysis, we obtain Pan-STARRS g, r, i, z, y
broad-band filters using the 1.8-m telescope located at the Haleakala
Observatory (Hawaii, US) and equipped with a 1.4 Gigapixel camera,
(i.e section 1 Introduction). As explained in the section 2 Candidate
selection, we use these bands images for each Pan-STARRS skycells.
Next (i.e section 3 Photometry), on obtained edge-on galaxies sample
we procced to photometric parameters extraction with SExtractor. In
addition to these ones, we calculated non-parametric morphological
statistics using the STATMORPH package.
Thus we provide two tables data, one for general information of the
subset of 16551 edge-on galaxies candidates selected by CNN models as
the most likely edge-on galaxies after the visual inspection votes.
The table1.dat regroup positional data, cross-IDs, data quality flag,
votes numbers and spectroscopic redshifts. For its part, the
table2.dat contains all SEXTRACTOR/STATMORPH photometric and
morphologic data of this EGIPS subset, (i.e see section 4 Data base
and catalogue).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
egips.dat 174 16435 General information and spectroscopic data of
our EGIPS objects sample
phot.dat 206 82169 The photometry table collects the SEXTRACTOR
data together with STATMORPH statistics of our
EGIPS objects sample in 5 bands * 16433 objects
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See also:
II/294 : The SDSS Photometric Catalog, Release 7
(Adelman-McCarthy+, 2009)
J/ApJ/787/24 : Structural parameters of true edge-on galaxies (Bizyaev+, 2014)
J/A+A/445/765 : A Catalog of Edge-on Disk Galaxies (Kautsch+, 2006)
J/ApJ/914/10 : Field RR Lyrae as Gal. probes. III. Abundances (Crestani+,2021)
VII/237 : HYPERLEDA. I. Catalog of galaxies (Paturel+, 2003)
VII/238 : HYPERLEDA. II. Homogenized HI data (Paturel+, 2003)
VII/219 : Revised Flat Galaxy Catalogue (RFGC) (Karachentsev+, 1999)
II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)
https://www.sao.ru/edgeon/catalogs.php? : Edge-on Galaxy Data base home page
https://ned.ipac.caltech.edu/uri/NED::InRefcode/2017ApJS..228...14C : RFGC NED
Byte-by-byte Description of file: egips.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 I7 --- PGC ? Unique identification number linked to the
HyperLeda database (Makarov et al.
2014A&A...570A..13M 2014A&A...570A..13M, Cat VII/237 and
Cat. VII/238) (pgc)
9- 30 A22 --- EGIPS Edge-on galaxies in the Pan-STARRS survey
designation JHHMMSS.s±DDMMSS (egips)
32- 42 F11.7 deg RAdeg Right ascension (J2000) (ra)
44- 54 F11.7 deg DEdeg Declination (J2000) (dec)
56- 74 A19 --- Coord Coordinates in the sexagesimal format
JHHMMSS.ss±DDMMSS.s (J2000)
76 I1 --- Flag Quality flag data, 0= better than 1,
1 = poor quality) (fcoo)
78- 83 F6.4 mag E(B-V) Colour excess according to the Galactic
extinction map by Schlegel et al.
(1998ApJ...500..525S 1998ApJ...500..525S) (EB-V)
85 I1 --- Votes Number of votes during the visual inspection
(votes)
87- 89 I3 % Good ? Percentage of votes for the edge-on
orientation of galaxies (pctgood)
91- 93 I3 % Accept ? Percentage of votes for the nearly edge-on
orientation of galaxies (pctacceptable)
95- 96 I2 % Unsuit ? Percentage of votes for the not edge-on
orientation of galaxies (unsuitable)
(pctunsuitable)
98- 105 A8 --- RFGC Cross-identification with the Revised Flat
Galaxy Catalogue, RFGC NNNN designation
(Karachentsev et al. 1999BSAO...47....5K 1999BSAO...47....5K,
Cat. VII/219) (rfgc)
107- 126 A20 --- EGIS Cross-identification with the Edge-on
Galaxies in SDSS, EGISJHHMMSS.s±DDMMSS
designation (Bizyaev et al.
2014ApJ...787...24B 2014ApJ...787...24B, Cat. J/ApJ/787/24)
(egis)
128- 156 A29 --- HYPERLEDA Principal object name in HyperLeda,
PGC NNNNNNN or Alternate names (Makarov
et al. 2014A&A...570A..13M 2014A&A...570A..13M, Cat. VII/237
and Cat. VII/238) (leda)
158- 160 I3 km/s Vmax ? Apparent maximum rotation velocity of the
gas in km/s from HyperLeda, Vmaxg (Makarov
et al. 2014A&A...570A..13M 2014A&A...570A..13M, Cat VII/237 and
Cat. VII/238) (vmax)
162- 167 I6 km/s cz ? Heliocentric redshift, cz in km/s from
HyperLeda, V (Makarov et al.
2014A&A...570A..13M 2014A&A...570A..13M, Cat VII/237 and
Cat. VII/238) (cz)
169- 174 I6 km/s zCMB ? Redshift in the CMB rest frame from
HyperLeda, V3k (2014A&A...570A..13M 2014A&A...570A..13M) (cz3k)
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Byte-by-byte Description of file: phot.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 22 A22 --- EGIPS Edge-on galaxies in the Pan-STARRS survey
designation JHHMMSS.s±DDMMSS (egips)
24- 30 I7 --- PGC ? Unique identification number linked to
the HyperLeda database
(Makarov et al. 2014A&A...570A..13M 2014A&A...570A..13M,
Cat VII/237 and Cat. VII/238) (pgc)
32- 35 I4 --- Cell Projection cell number in Pan-STARRS
tessellation, nnnn of skycell.nnnn.0yx
sky identifier (projcell)
37- 38 I2 --- Subc Subcell in the given skycell.nnnn.0yx,
0yx indicates the location of the skycell
in the projection cell. The coordinates y
and x vary from 0 to 9 indicating the
sub-cell within a projection cell
(subcell)
40 I1 --- Cand [0/5] Number of the candidate in the
given skycell.nnnn.Numberyx, (projcell,
subcell, candidate) a triplet of numbers
uniquely identifies an object in the
candidate catalog (candidate)
42 A1 --- Band [g r i z y] Character field indicating
one of the five Pan-STARRS bands (band)
44- 54 F11.7 deg RAdeg Right ascension (J2000) (ra)
56- 66 F11.7 deg DEdeg Declination (J2000) (dec)
68- 74 F7.3 arcsec StdA Standard deviation of the distribution of
light along the major axis of the galaxy
in arcsec (SExtractor: A), semi-major
axis for convenience (a)
76- 80 F5.3 arcsec e_StdA Uncertainty of the StdA (e_a)
82- 87 F6.3 arcsec StdB Standard deviation of the distribution of
light along the minor axis of the galaxy
in arcsec (SExtractor: B), semi-minor
axis for convenience (b)
89- 93 F5.3 arcsec e_StdB Uncertainty of the StdB (e_b)
95- 99 F5.3 --- Ell Ellipticity = 1-Stdb/Stda (ell)
101- 106 F6.2 deg PA Position angle of the major axis
(SExtractor: THETA_J2000) relative to the
North direction counted to East (J2000)
(pa)
108- 112 F5.2 --- KronRad Reduced Kron pseudo-radius
(SExtractor: KRON_RADIUS) (radkron)
114- 119 F6.3 mag Kronmag Estimate of the total apparent magnitude
using the Kron's 'first moment' algorithm
(Kron 1980ApJS...43..305K 1980ApJS...43..305K)
(SExtractor: MAG_AUTO) (magauto)
121- 125 F5.3 mag e_Kronmag Uncertainty of the Kronmag (e_magauto)
127- 132 F6.3 mag Kroncormag The Kron magnitude corrected for the
Galactic extinction according to Schlafly
et al. (2011ApJ...737..103S 2011ApJ...737..103S) (magautocor)
134- 138 F5.2 --- PetroRad Reduced Petrosian pseudo-radius
(SExtractor: PETRO_RADIUS) (radpetro)
140- 145 F6.3 mag Petromag Petrosian total apparent magnitude
(SExtractor: MAG_PETRO) (magpetro)
147- 151 F5.3 mag e_Petromag Uncertainty of the Petromag (e_magpetro)
153- 158 F6.3 mag Petrocormag The Petrosian magnitude corrected for the
Galactic extinction according to Schlafly
et al. (2011ApJ...737..103S 2011ApJ...737..103S)
(magpetrocor)
160- 163 F4.2 --- BadPix Fraction of bad pixels inside the
Petrosian ellipse (badpixfraction)
165 A1 --- FlagPhot Photometry usage flag, it is set to
f=false for 3010 cases if there are
indications of photometry problems,
otherwise it is set to t=true for 79159
cases (quality)
167- 171 F5.3 --- Gini ? Gini coefficient (Lotz et al.
2004AJ....128..163L 2004AJ....128..163L, Cat. J/AJ/128/163)
measures the inequality of the flux
distribution over a galaxy
(i.e see Rodriguez-Gomez et al.
2019MNRAS.483.4140R 2019MNRAS.483.4140R) (gini) (1)
173- 178 F6.3 --- M20 ? M20 statistic is the second-order
moment flux normalized
(i.e see Rodriguez-Gomez et al.
2019MNRAS.483.4140R 2019MNRAS.483.4140R) (m20) (2)
180- 184 F5.3 --- Conc ? Concentration index,
C=5*log10(r80/r20), where r20 and
r80 are the radii of circular apertures
containing 20 and 80 per cent of the
total light of the object
(i.e see Rodriguez-Gomez et al.
2019MNRAS.483.4140R 2019MNRAS.483.4140R)
(concentration)
186- 194 F9.3 --- Asym ? Asymmetry index calculated by
subtracting the 180° rotated galaxy
image from itself (i.e see
Rodriguez-Gomez et al.
2019MNRAS.483.4140R 2019MNRAS.483.4140R) (asymmetry)
196- 204 F9.3 --- Smooth ? Smoothness index also known as
clumpiness is calculated as difference
between original and smoothed image of
the galaxy (i.e see Rodriguez-Gomez et
al. 2019MNRAS.483.4140R 2019MNRAS.483.4140R) (smoothness)
206 I1 --- FlagMorph ? Stat morphology quality flag (0=good
for 68886 cases, 1=bad for 12984 cases)
indicates if there was a problem with the
basic measurements (smflag)
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Note (1): A Gini coefficient of zero means perfect equality (all pixels of a
galaxy have the same flux), while a Gini coefficient of one indicates
total inequality (the whole flux is concentrated in just one pixel).
Note (2): The M20 = logµ20/µtot statistics (Lotz et al.
2004AJ....128..163L 2004AJ....128..163L, Cat. J/AJ/128/163) is the second-order moment
µ = Sum(Ii * ri2) of the brightest 20 per cent of the total
flux normalized to the total second-order central moment of the
galaxy, where Ii is the flux at the ith pixel and ri is its
distance from the galaxy centre (for details see Rodriguez-Gomez et
al. 2019MNRAS.483.4140R 2019MNRAS.483.4140R). It tracks bright structures in the galaxy,
compact nuclei have small M20 values, while bars and spiral arms
produce high M20.
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History:
From electronic version of the journal
(End) Luc Trabelsi [CDS] 23-Jan-2025