J/A+A/532/A74 EFIGI catalogue of 4458 nearby galaxies (de Lapparent+, 2011)
The EFIGI catalogue of 4458 nearby galaxies with morphology.
Baillard A., Bertin W., de Lapparent V., Fouque P., Arnouts S., Mellier Y.,
Pello R., Leborgne J.-F., Prugniel P., Makarov D., Marakova L.,
McCraken H.J., Bijaoui A., Tasca L.
<Astron. Astrophys. 532, A74 (2011)>
=2011A&A...532A..74B 2011A&A...532A..74B
ADC_Keywords: Galaxies, nearby ; Morphology ; Redshifts
Keywords: astronomical databases: miscellaneous - catalogs -
galaxies: fundamental parameters - galaxies: spiral -
galaxies: dwarf - galaxies: elliptical and lenticular, cD
Abstract:
Now that large databases of resolved galaxy images are provided
by modern imaging surveys, advanced morphological studies can be
envisioned, urging for well defined calibration samples. We present
the EFIGI catalogue, a multiwavelength database specifically designed
for a dense sampling of all Hubble types. The catalogue merges data
from standard surveys and catalogues (Principal Galaxy Catalogue,
Sloan Digital Sky Survey, Value-Added Galaxy Catalogue, HyperLeda, and
the NASA Extragalactic Database) and provides detailed morphological
information.
Imaging data are obtained from the SDSS DR4 release in the u, g, r, i,
and z bands for a sample of 4458 PGC galaxies, whereas photometric and
spectroscopic data are obtained from the SDSS DR5 catalogue.
Point-Spread Function models are derived in all five bands. Composite
colour images of all objects are visually examined by a group of
astronomers, and galaxies are staged along the Hubble sequence and
classified according to 16 morphological attributes describing their
structure, texture, as well as environment and appearance on a
five-level scale.
The EFIGI Hubble sequence shows remarkable agreement with the RC3
Revised Hubble Sequence. The main characteristics and reliability of
the catalogue are examined, including photometric completeness, type
mix, systematic trends and correlations.
The final EFIGI database is a large sub-sample of the local Universe,
with a dense sampling of Sd, Sdm, Sm and Im types compared to
magnitude-limited catalogues. We estimate the photometric catalogue
to be more than ∼80% complete for galaxies with 10<g<14. More than
99.5% of EFIGI galaxies have a known redshift in the HyperLeda and
NED databases.
Description:
Visually-estimated morphometric parameters together with confidence
intervals for 4458 colour images of galaxies from the RC3 catalogue
overlapping the SDSS DR4 survey footprint.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
efigi.dat 336 4458 EFIGI morphometric catalogue (V1.6.2)
efigiz.dat 146 4458 EFIGI selected redshifts and corresponding distances
pgc.dat 88 4458 PGC parameters for the EFIGI catalogue galaxies
hleda.dat 129 4458 HyperLeda velocities, redshifts, types and names
for the EFIGI catalogue galaxies
ned.dat 50 4458 NED velocity, redshift and object name for the
EFIGI catalogue galaxies
sdss.dat 78 4458 SDSS identifiers, redshift and confidence level
for the EFIGI catalogue galaxies
--------------------------------------------------------------------------------
See also:
http://www.efigi.org/ : EFIGI home page
(Extraction de Formes Idealisees de Galaxies en Imagerie)
http://leda.univ-lyon1.fr/ : HyperLeda home page
http://www.sdss.org/ : SDSS Home Page
VII/155 : Third Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991)
Byte-by-byte Description of file (# headlines): efigi.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [PGC]
4- 10 I07 --- PGC PGC name
13- 23 F11.7 deg RAdeg Right ascension (J2000.0)
26- 36 F11.7 deg DEdeg Declination (J2000.0)
39- 40 I2 --- T EHS morphological type (1)
43- 44 I2 --- b_T EHS morphological type: lower confidence limit
47- 48 I2 --- B_T EHS morphological type: upper confidence limit
50- 54 F5.2 --- B/T [0,1]?=-1 Bulge-to-total ratio (2)
56- 60 F5.2 --- b_B/T [0,1]?=-1 lower confidence limit of B/T
62- 66 F5.2 --- B_B/T [0,1]?=-1 upper confidence limit of B/T
68- 72 F5.2 --- armS [0,1]?=-1 Arm strength (3)
74- 78 F5.2 --- b_armS [0,1]?=-1 Arm strength: lower confidence limit
80- 84 F5.2 --- B_armS [0,1]?=-1 Arm strength: upper confidence limit
86- 90 F5.2 --- armC [0,1]?=-1 Average spiral arm curvature (4)
92- 96 F5.2 --- b_armC [0,1]?=-1 lower confidence limit of armC
98-102 F5.2 --- B_armC [0,1]?=-1 upper confidence limit of armC
[0,1]?=-1 upper confidence limit
104-108 F5.2 --- armR [0,1]?=-1 Winding direction of spiral arms (5)
110-114 F5.2 --- b_armR [0,1]?=-1 lower confidence limit of armR
116-120 F5.2 --- B_armR [0,1]?=-1 upper confidence limit of armR
122-126 F5.2 --- barL [0,1]?=-1 Length of central bar (6)
128-132 F5.2 --- b_barL [0,1]?=-1 lower confidence limit of barL
134-138 F5.2 --- B_barL [0,1]?=-1 upper confidence limit of barL
140-144 F5.2 --- iRing [0,1]?=-1 Strength of inner ring, lens or
inner pseudo-ring (7)
146-150 F5.2 --- b_iRing [0,1]?=-1 lower confidence limit of iRing
152-156 F5.2 --- B_iRing [0,1]?=-1 upper confidence limit of iRing
158-162 F5.2 --- oRing [0,1]?=-1 Strength of outer ring (8)
164-168 F5.2 --- b_oRing [0,1]?=-1 lower confidence limit of oRing
170-174 F5.2 --- B_oRing [0,1]?=-1 upper confidence limit of oRing
176-180 F5.2 --- pRing [0,1]?=-1 Type and strength of pseudo-ring (9)
182-186 F5.2 --- b_pRing [0,1]?=-1 lower confidence limit of pRing
188-192 F5.2 --- B_pRing [0,1]?=-1 upper confidence limit of pRing
194-198 F5.2 --- Pert [0,1] Deviation from rotational symmetry (10)
200-204 F5.2 --- b_Pert [0,1] lower confidence limit of Pert
206-210 F5.2 --- B_Pert [0,1] upper confidence limit of Pert
212-216 F5.2 --- vDust [0,1] Strength of dust features (11)
218-222 F5.2 --- b_vDust [0,1] lower confidence limit of vDust
224-228 F5.2 --- B_vDust [0,1] upper confidence limit of vDust
230-234 F5.2 --- pDust [0,1]?=-1 Patchiness of dust features (12)
236-240 F5.2 --- b_pDust [0,1]?=-1 lower confidence limit of pDust
242-246 F5.2 --- B_pDust [0,1]?=-1 upper confidence limit of pDust
248-252 F5.2 --- floc [0,1] Strength of flocculent features (13)
254-258 F5.2 --- b_floc [0,1] lower confidence limit of floc
260-264 F5.2 --- B_floc [0,1] upper confidence limit of floc
266-270 F5.2 --- spot [0,1] Strength of regions of strong star
formation or active nuclei (14)
272-276 F5.2 --- b_spot [0,1] lower confidence limit of spot
278-282 F5.2 --- B_spot [0,1] upper confidence limit of spot
284-288 F5.2 --- inc [0,1] Inclination of the disk / elongation
of the spheroid (15)
290-294 F5.2 --- b_inc [0,1] lower confidence limit of inc
296-300 F5.2 --- B_inc [0,1] upper confidence limit of inc
302-306 F5.2 --- cont [0,1] Severity of contamination by stars,
or artifacts (16)
308-312 F5.2 --- b_cont [0,1] lower confidence limit of cont
314-318 F5.2 --- B_cont [0,1] upper confidence limit of cont
320-324 F5.2 --- mult [0,1] Severity of contamination by stars,
galaxies or artifacts (17)
326-330 F5.2 --- b_mult [0,1] lower confidence limit of mult
332-336 F5.2 --- B_mult [0,1] upper confidence limit of mult
--------------------------------------------------------------------------------
Note (1): The EFIGI morphological classification is defined by slightly
modifying the RC3 Hubble classification: the main galaxy sequence is identical
to that of the RC3, but peculiar galaxies and special features are no longer
considered as separate stages. The resulting classification, which we call the
EFIGI Hubble Sequence (EHS) is summarised below:
-------------------------------------------------------------------------------
Class | Stage |Litteral| EHS | Description
| | type | type |
-------------------------------------------------------------------------------
Elliptical | Compact | cE | -6 | Compact elliptical.
Elliptical | 0-6 | E | -5 | More or less elongated
Elliptical | cD | cD | -4 | Giant elliptical. Sharp central profile
| | | | and very extended, low surface
| | | | brightness halo
-------------------------------------------------------------------------------
Lenticular | Early | S0- | -3 | Dominant bulge, no sign of structure in
| | | | disk nor dust
Lenticular |Intermed. | S00 | -2 | Some structure in disk but no arms,
| | | | small amounts of dust
Lenticular | Late | S0+ | -1 | Clear structure in disk but no arms,
| | | | thin dust lanes
-------------------------------------------------------------------------------
Spiral | 0/a | S0/a | 0 | Very tightly wound arms, very prominent
| | | | bulge, low amounts of dust
Spiral | a | Sa | 1 | Tightly wound arms, very prominent
| | | | bulge, low amounts of dust
Spiral | ab | Sab | 2 | Quite tightly wound arms, prominent
| | | | bulge, low amounts of dust
Spiral | b | Sb | 3 | Quite tightly wound arms, prominent
| | | | bulge, strong dust lanes
Spiral | bc | Sbc | 4 | Quite loosely wound arms, medium bulge,
| | | | dust lanes
Spiral | c | Sc | 5 | Grand design spiral, fairly weak bulge,
| | | | dust lanes
Spiral | cd | Scd | 6 | Loosely wound and weak arms, weak
| | | | bulge, scattered dust
Spiral | d | Sd | 7 | Loosely wound and very weak arms, weak
| | | | bulge, scattered dust
Spiral | dm | Sdm | 8 | Very loosely wound arms, very weak
| | | | bulge, small amounts of dust
Spiral | m | Sm | 9 | No arms, very weak bulge, small amounts
| | | | of dust
-------------------------------------------------------------------------------
Irregular |Magellanic| Im | 10 | No arms, no bulge. Irregular profile.
| | | | Low surface brightness. May host a bar
-------------------------------------------------------------------------------
Dwarf | Dwarf | dE | 11 | Regular low surface brightness profile,
|spheroidal| | | no arms. May contain a tight nucleus
|elliptical| | |
-------------------------------------------------------------------------------
Note (2): Bulge/Total ratio. This attribute measures the relative contribution
of the bulge (spheroidal) component to the total flux of the galaxy. Im
galaxies have BulgetoTotal=0 and elliptical galaxies have BulgetoTotal=1.
Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no bulge
0.25 | very weak bulge comprising ∼25% of the total flux
0.5 | medium bulge comprising ∼50% of the total flux
0.75 | strong bulge comprising ∼75% of the total flux
1 | all flux within bulge, no disk nor spiral arms
------------------------------------------------------------------------------
Note (3): Arm strength. This attribute measures the relative strength of spiral
arms, in terms of the flux fraction relative to the whole galaxy. 0 indicates
no visible arms, while 1 corresponds to the highest fraction observed in the
EFIGI sample. When no spiral arms are visible (either due to the galaxy
structure or to a high inclination that prevents any existing arm to be seen),
this attribute is undefined. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | very weak or no spiral arms
0.25 | weak contribution of the spiral arms to the galaxy flux
0.5 | moderate contribution of the spiral arms to the galaxy flux
0.75 | significant contribution of the spiral arms to the galaxy flux
1 | highest contribution of the spiral arms to the galaxy flux
------------------------------------------------------------------------------
Note (4): Arm curvature. This attribute measures the average intrinsic curvature
of the spiral arms, that is for the same galaxy seen face-on, as inclination
increases the variations of the arm curvature along the arms. It is
subordinate to the Arm_Strength attribute: for all EFIGI galaxies for which
Arm_Strength is undefined, and for the majority of EFIGI galaxies with
Arm_Strength = 0, specifically those with no visible spiral arms,
Arm_Curvature has no meaning and the attribute is undefined. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | wide open spiral arms, with pitch angles of 40 degrees or more
0.25 | open spiral arms, with pitch angles of 30 to 40 degrees
0.5 | moderately open spiral arms, with pitch angles of 20 to 30 degrees
0.75 | closed-in spiral arms, with pitch angles of 10 to 20 degrees
1 | tightly wound spiral arms, with pitch angles of 10 degrees or less
------------------------------------------------------------------------------
Note (5): Arm_Rotation. This attribute indicates whether the spiral pattern
appears to rotate clockwise (East of North negative) or counterclockwise (East
of North positive). It is subordinate to the Arm_Strength attribute: for the
vast majority of EFIGI galaxies with Arm_Strength = 0, specifically those
with no visible spiral arms, Arm_Rotation has no meaning and the attribute is
undefined. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | definitely clockwise
0.25 | probably clockwise
0.5 | no preferred direction
0.75 | probably counterclockwise
1 | definitely counterclockwise
------------------------------------------------------------------------------
Note (6): Bar length. This attribute quantifies the presence of a central bar
component in the galaxy, in terms of length relative to the galaxy diameter
D_25. Bar_Length is often undefined for highly inclined disks in which one
cannot assess the presence of a bar. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no visible bar
0.25 | barely visible bar feature
0.5 | short bar, with a length about one third of D_25
0.75 | long bar, that extends over about half of D_25
1 | very long, prominent bar that extends over more than half of D_25
------------------------------------------------------------------------------
Note (7): Inner ring. This attribute measures the presence of a circular or
elliptical ring-like overdensity that is within the disk and/or spiral arm
pattern, and at the end of the bar when present (contrary to nuclear rings
that occur well within the bar). This attributes also includes inner lenses,
that is regions of nearly constant surface brightness with radius, as well as
the inner pseudo-rings, which are not completely closed and more spiral-like.
Strength is proportional to the fraction of galaxy light contained within the
ring. A value of 1 corresponds to the highest fraction observed in the
catalogue. This attribute is undefined for highly inclined disks in which one
cannot assess the presence of a ring. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no inner ring
0.25 | low ring contribution to the galaxy flux
0.5 | intermediate ring contribution to the galaxy flux
0.75 | significant ring contribution to the galaxy flux
1 | highest ring contribution to the galaxy flux
------------------------------------------------------------------------------
Note (8): Outer ring. This attribute measures the presence of a circular or
elliptical ring-like over-density that lies mostly outside the disk and/or
spiral arm pattern. This attributes also includes outer lenses, that is
regions of nearly constant surface brightness with radius. Strength is
proportional to the fraction of galaxy light contained within the ring. A
value of 1 corresponds to the highest fraction observed in the catalogue. This
attribute is undefined for highly inclined disks in which one cannot assess
the presence of a ring. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no outer ring
0.25 | low ring contribution to the galaxy flux
0.5 | intermediate ring contribution to the galaxy flux
0.75 | significant ring contribution to the galaxy flux
1 | highest ring contribution to the galaxy flux
------------------------------------------------------------------------------
Note (9): Pseudo-ring. This attribute measures the presence of outer
pseudo-rings as defined by Buta & Combes (1996FCPh...17...95B 1996FCPh...17...95B): the R1' ring,
having a dimpled "eight" shape due to a 180 degrees winding of the spiral
arms with respect to the end of a bar; the R2' feature, with a higher
winding of 270 degrees of the spiral arms with respect to the bar; and the
intermediate R1R2' pattern. Values of 0.75 and 1 are assigned to galaxies
having two closed-loop arms of type R1', and grade the fraction of the total
galaxy light that is included in the pseudo-ring feature. Values of 0.25 and
0.5 are assigned to galaxies for which one or both of the arms do not form a
closed-loop of type R1', thus including types R2' and R1R2' from Buta &
Combes 1996, and also grade the fraction of the total galaxy light that is
included in the pseudo-ring feature. This attribute is undefined for highly
inclined disks in which one cannot assess the presence of a pseudo-ring.
Values are:
-------------------------------------------------------------------------------
Value | Meaning
-------------------------------------------------------------------------------
-1 | undefined
0 | no visible pseudo-ring feature
0.25 | R2' and R1R2' pseudo-rings containing a low fraction of the
| galaxy flux
0.5 | R2' and R1R2' pseudo-rings containing a higher fraction of the
| galaxy flux
0.75 | R1' pseudo-ring feature containing a low fraction of the galaxy flux
1 | R1' pseudo-ring feature containing a higher fraction of the galaxy flux
-------------------------------------------------------------------------------
Note (10): Perturbation. This attribute measures the amplitude of distortions
in the galaxy profile, due to tidal effects for instance. 0 indicates a light
profile with rotational symmetry (hence regular spiral arms when applicable),
while 1 corresponds to the most distorted galaxies observed in the catalogue.
Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no distortion
0.25 | slight distortion of the object profile and/or the spiral arms
0.5 | moderate distortion of the object profile and/or the spiral arms
0.75 | strong distortion, with bulge, disk, or spiral arms still identifiable
1 | completely distorted profile, components can barely be distinguished
------------------------------------------------------------------------------
Note (11): Visible dust. This attribute measures the strength of features
revealing the presence of dust: obscuration and/or diffusion of star light by
a dust lane or molecular clouds. Values are:
-------------------------------------------------------------------------------
Value | Meaning
-------------------------------------------------------------------------------
-1 | undefined
0 | no dust
0.25 | indications of dust, but dust cannot be located
0.5 | low to moderate amounts of dust, can be located
0.75 | significant amounts of dust covering < 50% of the surface of the galaxy
1 | high amounts of dust covering > 50% of the surface of the galaxy
-------------------------------------------------------------------------------
Note (12): Dust dispersion. This attribute measures the "patchiness" of the dust
distribution in terms of whether the dust is smoothly distributed in sharp
lanes (or rings) or distributed in strongly irregular patches. This attribute
is subordinate to the Visible_Dust attribute: Dust_Dispersion is undefined
when Visible_Dust is equal to 0 or 1. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | thin lane(s) of dust with smooth outline
0.25 | thin lane(s) of dust with patchy outline
0.5 | patchy lane(s) of dust and some other small patches
0.75 | very patchy lane(s) of dust and many other patches
1 | extremely patchy distribution of the dust
------------------------------------------------------------------------------
Note (13): Flocculence. This attribute measures the importance of "flocculent"
features due to scattered HII regions relative to the strength of spiral arms
and the underlying smooth profile components. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no visible flocculence
0.25 | weak/barely visible flocculence limited to small parts of the disk
0.5 | some flocculence visible in parts of the galaxy disk
0.75 | significant flocculence over most of the galaxy disk
1 | strong flocculence over most of the galaxy disk
------------------------------------------------------------------------------
Note (14): Hot spots. This attribute indicates the presence of "hot spots", that
is regions with a very high surface brightness such as giant regions of star
formation, active nuclei, or stellar nuclei of dwarf galaxies. It is not to be
confused with scattered HII regions of normal intensity contributing to the
"flocculent" aspect of some disks. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no hot spot
0.25 | small part of the galaxy flux included in one or several hot spots
0.5 | moderate part of the galaxy flux included in one or several hot spots
0.75 | significant part of the galaxy flux included in one or several
| hot spots
1 | one or several hot spots dominate the galaxy flux
------------------------------------------------------------------------------
Note (15): Inclination/elongation. For galaxies with a visible disk (lenticulars
and spirals), this attribute measures the disk inclination f=1-cos(theta),
where theta is the angle between the rotation axis of the disk and the
line-of-sight of the observer, or equivalently between the galaxy disk and the
plane of the sky; theta then varies from 0 degrees (face-on) to 90 degrees
(edge-on). For galaxies with no obvious disk (ellipticals, cD, cE, Im and dE),
this attribute provides an estimate of the apparent elongation of the object,
that is f = 1 - b/a with a and b the apparent major and minor axis lengths
respectively. The scale of elongation is matched to that of inclination so
that a circular disk of a given inclination attribute value would have an
identical elongation attribute value. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | 0-35 degree disk inclination (face-on) / very low elongation f<0.2
0.25 | 35-50 degree disk inclination angle / low elongation 0.2<f<0.4
0.5 | 50-70 degree disk inclination angle / moderate elongation 0.4<f<0.7
0.75 | 70-80 degree disk inclination angle / strong elongation 0.7<f<0.8
1 | 80-90 degree disk inclination (edge-on) / very strong elongation f>0.8
------------------------------------------------------------------------------
Note (16): Contamination. This attributes indicates the severity of the
contamination by bright stars, overlapping galaxies or image artifacts
(diffraction spikes, star halos, satellite trails, electronic defects,...).
Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no overlapping source visible on the galaxy isophotal footprint
0.25 | only faint sources overlapping the galaxy isophotal footprint
| (negligible effect on photometry and morphometry)
0.5 | overlapping sources on the galaxy isophotal footprint or faint
| gradient / background light pollution
| (some impact on photometry and morphometry)
0.75 | bright sources overlapping the galaxy footprint or strong gradient /
| background light pollution
| (large impact on photometry and morphometry)
1 | most of the galaxy image footprint dominated by light from a very
| bright contaminant (unreliable photometry or morphometry)
------------------------------------------------------------------------------
Note (17): Multiplicity. This attribute quantifies the abundance of galaxies in
the vicinity of the main galaxy. Only galaxies that have magnitudes less than
that of the main galaxy plus ∼5 mag, and whose centre lies within 0.75 D_25
from the image centre are counted. Values are:
------------------------------------------------------------------------------
Value | Meaning
------------------------------------------------------------------------------
-1 | undefined
0 | no other galaxy
0.25 | one neighbouring galaxy
0.5 | two neighbouring galaxies
0.75 | three neighbouring galaxies
1 | four or more neighbouring galaxies
------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Byte-by-byte Description of file: efigiz.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [PGC]
4- 10 I07 --- PGC PGC galaxy number
12- 22 F11.7 deg RAdeg Right ascension in decimal degrees (J2000)
24- 34 F11.7 deg DEdeg Declination in decimal degrees (J2000)
36- 46 E11.4 --- zhel ?=-99.99 Selected heliocentric redshift
48- 57 E10.4 --- e_zhel ?=-9.9999 Uncertainty in zhel
59- 62 A4 --- r_zhel Catalogue of redshift correction for
Local Group infall into Virgo redshift (18)
64- 73 E10.4 --- zdis Selected redshift corrected for Local Group
infall into Virgo (error always -99.99)
75- 84 A10 --- r_zdis Catalogue of redshift correction for Local Group
infall into Virgo redshift (19)
86- 95 E10.4 --- zall ?=-9.9999 zdis, or zhel if zdis undertermined
97-100 A4 --- n_zall Type of redshift in zall: DIS or HEL (20)
102-111 E10.4 --- e_zall ?=-9.9999 Uncertainty in redshift used for zall
113-116 A4 --- f_zall uncertainty origin (HEL = heliocentric)
118-126 F9.4 Mpc Dcom ?=-999.9999 Comoving distance derived from zall
128-136 F9.4 Mpc Dlum ?=-999.9999 Luminosity distance derived from zall
138-146 F9.4 Mpc Ddiam ?=-999.9999 Transverse diameter distance derived
from zall
--------------------------------------------------------------------------------
Note (18): Catalogue of redshift correction as follows:
HL = HyperLeda
NED = NED
SDSS = SDSS
Note (19): Catalogue of redshift correction as follows:
HL = HyperLeda corrected redshift for Local Group infall into Virgo
NED-vir-HL = NED heliocentric redshift corrected with the HyperLeda
correction for Local Group infall into Virgo
Note (20): Type of redshift as follows:
DIS = redshift corrected for Local Group infall into Virgo stored in zall
HEL = heliocentric redshift stored in zall
--------------------------------------------------------------------------------
Byte-by-byte Description of file: pgc.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [PGC]
4- 10 I07 --- PGC PGC galaxy number
12- 15 F4.1 --- Tpgc ?=-9.9 RC3 morphological type
17- 20 F4.1 --- e_Tpgc ?=-9.9 Mean error on Tpgc
22- 28 A7 --- MType Expanded morphological type
30- 34 F5.2 [0.1arcmin] logD25 ?=-99.99 Mean apparent major isophotal
diameter measured at or reduced to surface
brightness level 25.0Bmag/arcsec2
36- 40 F5.2 [---] logR25 ?=-9.99 Log of ratio of mean major isophotal
diameter (D25) to mean minor isophotal diam.
42- 46 I5 deg PA ?=-9999 Position angle of major axis
48- 53 F6.2 mag BTmag ?=-99.99 Total B magnitude
55- 59 F5.2 mag e_BTmag ?=-9.99 Mean error on BTmag
61- 65 F5.2 mag B-VT ?=-9.99 Total (B-V) colour index
67- 71 F5.2 mag e_B-VT ?=-9.99 Mean error on total (B-V)
73- 77 I5 km/s czP ?=-9999 Heliocentric velocity
79- 88 E10.4 --- zP ?=-9.999 Redshift
--------------------------------------------------------------------------------
Byte-by-byte Description of file: hleda.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [PGC]
4- 10 I07 --- PGC PGC galaxy number
12- 18 F7.1 km/s HRVr ?=-9999.9 Heliocentric radial velocity from
radio measurement
20- 24 F5.1 km/s e_HRVr ?=-99.9 Actual error on HRVr
26- 33 F8.1 km/s HRVo ?=-9999.9 Heliocentric radial velocity from
optical measurement
35- 39 F5.1 km/s e_HRVo ?=-99.9 Actual error on HRVo
41- 48 F8.1 km/s HRV ?=-9999.9 Mean heliocentric radial velocity
50- 54 F5.1 km/s e_HRV ?=-99.9 Actual error on HRV
56- 63 F8.1 km/s RVvir Radial velocity corrected for Local Group
infall into Virgo
65- 74 E10.4 --- zvir ?=-9.999 Redshift corrected for Local Group
infall into Virgo
76- 85 E10.4 --- e_zvir ?=-9.999 Redshift error derived from e_RVvir
87- 90 A4 --- MType Morphological type
92-100 A9 --- Name Principal (main) designation
102-129 A28 --- OName List of all object names
--------------------------------------------------------------------------------
Byte-by-byte Description of file: ned.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [PGC]
4- 9 I06 --- PGC PGC number
11- 15 I5 km/s cz ?=-9999 Heliocentric velocity
17- 25 F9.6 --- z ?=-9.999 Redshift
27- 50 A24 --- NED NED name
--------------------------------------------------------------------------------
Byte-by-byte Description of file: sdss.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [PGC]
4- 10 I07 --- PGC PGC galaxy number
12- 29 A18 --- objID Unique SDSS photometric identifier composed
from skyVersion, rerun, run, camcol, field, obj
31- 48 A18 --- specObjID Unique SDSS spectroscopic identifier
50- 59 E10.4 --- zS ?=-9.99 Redshift
61- 70 E10.9 --- e_zS ?=-9.99 Uncertainty in redshift
72- 78 F7.4 --- zSconf [0,1]?=-9.99 Confidence level in redshift
--------------------------------------------------------------------------------
History:
* 30-Jul-2011 : file efigi.da from E. Bertin; other files copied from
http://www.efigi.org/
(End) Emmanuel Bertin [IAP], Patricia Vannier [CDS] 30-Jun-2011