ACDS V10.0 - Mon Jul 20 10:47:53 CEST 2020
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Detailed Description of VII/113 :
Catalogued Galaxies + QSOs observed in IRAS Survey, Vers.2 (IPAC 1989)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
VII/113 Catalogued Galaxies + QSOs observed in IRAS Survey, Vers.2 (IPAC 1989)
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Catalogued Galaxies and Quasars observed in the IRAS Survey, Version 2
Fullmer L., Londsale C.J., IPAC, 1989
<JPL D-1932, Version 2, 1989 February>
=1989IRASG....c....F
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ADC_Keywords: Infrared sources ; Galaxy catalogs ; QSOs
Mission_Name: IRAS
Description (from the Introduction of the catalog):
The Infrared Astronomical Satellite (IRAS) surveyed approximately
96% of the sky in four infrared wavelength bands centered at 12,
25, 60, and 100 um. The IRAS data are presented in catalogs of
point sources and small extended sources (<8') as well as in
atlases of low resolution spectra and sky-brightness images. The
Cataloged Galaxies and Quasars Observed in the IRAS Survey,
hereafter referred to as the "Extragalactic Catalog", is the
subset of those point source data pertaining to previously known
galaxies and quasars. It is intended as a readily accessible
compilation of IRAS data for objects appearing in the most
widely-used extragalactic catalogs.
The Extragalactic Catalog contains 11,444 IRAS point sources
(IRAS Point Source Catalog, Version 2.0) that can be positionally
associated with catalogued galaxies and quasars, including
association information of point sources with sources from the
IRAS Small Scale Structure Catalog. Section II summarizes
important aspects of the IRAS mission and the data processing
techniques. Section III describes the organisation of the
Extragalactic Catalog and the way in which the associations were
made with the various galaxy catalogs. Section IV describes the
information given for each entry in the Extragalactic Catalog.
Section V presents some preliminary statistics on the contents of
the Extragalactic Catalog. Acknowledgments and References are
given in Sections VI and VII. The catalog itself comprises Section
VIII. Some notes and errata are given in Sections IX and X. A
printed and a tape version of the Extragalactic Catalog are
available.
Notice:
This file is NOT a complete scientific document for the catalogue;
it serves only as a minimal description of the general format and
structure of the data files. A copy of "Cataloged Galaxies and
Quasars Observed in the IRAS Survey, 2" should be used to answer
questions about the data in the IRAS Extragalactic Catalog.
File Summary:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× intro.txt 83 675 Excerpt from the published documentation
× xcat.dat 134 11444 Point source data
× assoc.dat 137 12776 Association Data for Extragalactic Catalog
Byte-by-byte Description of file: xcat.dat
Bytes Format Units Label Explanations
1- 11 A11 --- IRAS Source name
12- 13 I2 h RAh Hours RA, equinox 1950.0, epoch 1983.5
15- 16 I2 min RAm Minutes RA, equinox 1950.0, epoch 1983.5
18- 21 F4.1 s RAs Seconds RA, equinox 1950.0, epoch 1983.5
23 A1 --- DE- Sign of DEC, equinox 1950.0, epoch 1983.5
24- 25 I2 deg DEd Degrees Dec, equinox 1950.0, epoch 1983.5
27- 28 I2 arcmin DEm Minutes Dec, equinox 1950.0, epoch 1983.5
30- 31 I2 arcsec DEs Seconds Dec, equinox 1950.0, epoch 1983.5
33- 35 I3 deg GLAT Galactic latitude
37- 39 I3 arcsec UncMajor Uncertainty ellipse semi-major axis
40- 42 I3 arcsec UncMinor Uncertainty ellipse semi-minor axis
44- 46 I3 deg PosAng Uncertainty ellipse position angle measured
East of North between the major axis of the
ellipse and the local equatorial meridian.
47- 48 I2 --- NHcon Number of times observed
49- 54 F6.2 Jy Fnu_12 Non-color corrected flux density at 12um
55 A1 --- FQual_12 [:L] Flux quality at 12um (1)
56- 61 F6.2 Jy Fnu_25 Non-color corrected flux density at 25um
62 A1 --- FQual_25 [:L] Flux quality at 25um (1)
63- 69 F7.2 Jy Fnu_60 Non-color corrected flux density at 60um
70 A1 --- FQual_60 [:L] Flux quality at 60um (1)
71- 77 F7.2 Jy Fnu_100 Non-color corrected flux density at 100um
78 A1 --- FQual_100 [:L] Flux quality at 100um (1)
79- 84 F6.2 [W/m2] log(FIR) Decimal log of far infrared flux (4)
85 A1 --- FQFIR [:L] FIR flux quality (1)
86 A1 --- Relunc_12 [A-F] Flux density uncertainty at 12um (2)
87 A1 --- Relunc_25 [A-F] Flux density uncertainty at 25um (2)
88 A1 --- Relunc_60 [A-F] Flux density uncertainty at 60um (2)
89 A1 --- Relunc_100 [A-F] Flux density uncertainty at 100um (2)
91 A1 --- CC_12 [A-N] Point source corr. coeff, 12um (3)
92 A1 --- CC_25 [A-N] Point source corr. coeff, 25um (3)
93 A1 --- CC_60 [A-N] Point source corr. coeff, 25um (3)
94 A1 --- CC_100 [A-N] Point source corr. coeff, 100um (3)
96 I1 --- Cirr1 Number of nearby 100 micron only sources
97 I1 --- Cirr2 Ratio of cirrus flux to source flux
99 A1 --- Confuse [0-9A-F] Confusion flag, hex encoded (5)
100 I1 --- PNearH Number hours-confirmed point sources nearby
If it exceeds 9, it is set equal to 9.
101 I1 --- PNearW Number weeks-confirmed point sources nearby
If it exceeds 9, it is set equal to 9.
102 A1 --- HSDFlag [0-9A-F] High source density bin flag,
hex encoded (5)
104 I1 --- SES1_12 Number of seconds-confirmed 12um SES
(Small Extended Sources) nearby
105 I1 --- SES1_25 Number of seconds-confirmed 25um SES nearby
106 I1 --- SES1_60 Number of seconds-confirmed 60um SES nearby
107 I1 --- SES1_100 Number of seconds-confirmed 100um SES nearby
108 A1 --- SES2 [0-9A-F] Number of weeks-confirmed SES nearby
hex encoded (5)
109-110 I2 --- NSSS ? Number of associations from SSS
(Small Scale Structure) catalog
112-121 A10 --- SSSName Name of closest SSS association
122-124 I3 arcsec DisSSS ? Separation from the SSS source
125-126 I2 --- NonGal ? Number of associations from non-galaxy
catalogs
128 A1 --- IdnGal [1-9A-J] Closest non-galaxy catalog
association (6)
130-132 I3 arcsec DSNGal ? Separation of the non-galaxy source
133-134 I2 --- NRecs Number of lines in "assoc" file with IRAS name
Note (1): Flux quality codes are
(blank) = high quality;
':' = moderate quality;
'L' = upper limit
Note (2): Uncertainties of FIR are coded as follows:
A = from 0 to less than 4%
B = from 4 to less than 8
C = from 8 to less than 12
D = from 12 to less than 16
E = from 16 to less than 20
F = equal to or greater than 20%
Note (3): Correlation Coefficient codes are:
A = 100%, B = 99%, C = 98%, ...,
M = 88%, N = 87%
Note (4): FIR estimates the flux that would have been measured within
an ideal square bandpass 42.5-122.5um; it is a combination of
60 and 100 micron fluxes. See Appendix B, printed edition.
Note (5): Hex encoded flags compose the flags of the 4 passbands
with masks 1=12um, 2=25um, 4=60um, 8=100um.
See Table IV.A.1., printed edition.
Note (6): Codes for non-galaxy id's are in Table IV.A.2., printed edition.
Very brief summary:
------------------------------------------------------------------------
1 = SAO A = PN (Planetary Nebulae)
2 = HR (Bright Star) B = Parkes HII Survey
3 = DO (Dearborn Red *) C = Bonn HII Survey
4 = GCVS (Variable name) D = CO Velocities Toward HII Regions
5 = Wackerling (emission *) E = LDN (Lynds Dark Nebulae)
6 = NSV (Supsected Variables) F = AFGL (Air Force Geophys. Lab.)
7 = CCCS (Cool C*) G = IRC (2-um Sky Survey)
8 = Gliese (nearby *) H = EIC (Equatorial IR Catalogue)
9 = CSS (S*) I = IRC improved (Kleinmann+Joyce 1984)
J = 1Jy (extragalactic sources)
------------------------------------------------------------------------
Byte-by-byte Description of file: assoc.dat
Bytes Format Units Label Explanations
1- 11 A11 --- IRAS IRAS source name
12- 23 A12 --- PGCName Galaxy name from Primary Galaxy Catalog
(UGC, UGCA, ESO, and CGCG)
25 I1 --- NPGC ? Number of appearances of PGCName in file
26- 30 I5 arcsec DiamP ? Major axis diameter
33- 35 I3 arcsec DisPGC ? Distance from IRAS source
37- 39 I3 deg paPGC [0/360]? Position angle of separation vector
measured in degrees East of North
41 A1 --- PosFlg [B-Z] Position flag (1)
42 A1 --- MagFlg [B-Z] Magnitude flag (1)
44- 47 F4.1 mag MagPGC ? Magnitude from Primary Galaxy Catalog
49- 55 A7 --- Class Classification
57- 67 A11 --- MCG Morphological Catalog of Galaxies (MCG) number
69 I1 --- NMCG ? Number of appearances of MCG in file
71- 74 I4 arcsec DiamMCG ? Major axis diameter
76- 78 I3 arcsec DisMCG ? Distance from IRAS source
measured in degrees East of North
80- 82 I3 deg paMCG [0/360]? Position angle of separation vector
84- 90 A7 --- NGCIC NGC or IC identification of Primary Catalog
or MCG galaxy
91- 97 A7 --- AMDName ARP, MKN, DDO associations
99 I1 --- NAMD ? Number of appearances of AMDName in file
101-103 I3 arcsec DisAMD ? Distance from IRAS source
105-107 I3 deg paAMD [0/360]? Position angle of separation vector
measured in degrees East of North
109-119 A11 --- VVZName VCV (Veron-Cetty and Veron 1984),
VV Verontsov-Velyaminov (Interact. Gal.),
and Zwicky list associations
121 I1 --- NVVZ ? Number of appearances of VVZName in file
123-125 I3 arcsec DisVVZ ? Distance from IRAS source
127-129 I3 deg paVVZ [0/360]? Position angle of separation vector
measured in degrees East of North
131-132 A2 --- VCVFlg VCV identifier or VV flag (2)
133-137 I5 --- RecNo [1/11444]+= Main Data Table record number
for IRAS source
Note (1): The position and Magnitude flags are described in Section IX.A
of the printed edition:
B = The right ascension was changed to agree with the printed entry,
or with a printed remark.
C = The declination was changed to agree with the printed catalog.
D = The position comes from the compilation of Dressel and Condon (1976).
F = The right ascension was changed to agree with the conversion of
printed galactic coordinates.
G = The declination was changed to agree with the conversion of
printed galactic coordinates.
H = The magnitude was changed to agree with the printed version.
K = The UGC and CGCG positions disagree, though the magnitudes agree.
A combination of inspections of sky survey plates, UGC hardcopy notes,
and cross-references using NGC or IC identifications resulted in the
verification that the UGC and CGCG names refer to the same object.
The UGC position has been adopted.
L = As for K, but a better position than that given in either the UGC
or CGCG was derived using a sky survey overlay, because neither of
the catalogued positions was adequate. This new position should be
accurate to about 1'.
M = No CGCG object could be found that matched this UGC galaxy in
position, although the UGC magnitude is not greater than 15.7.
One possible explanation is that the galaxy is contained in
one of the Zwicky lists of Selected Compact and Post-Eruptive
Galaxies instead of the CGCG.
N = A UGC and a CGCG galaxy are found with identical positions but
the magnitudes disagree. The CGCG magnitude is brighter than the UGC
magnitude by more than 1 magnitude. The UGC magnitude is quoted.
P = As for N, except that the magnitudes disagree by less than 1
magnitude. The UGC magnitude is given.
Q = The UGC and CGCG positions are identical, but the magnitudes
disagree because the CGCG magnitude applies to individual members of
a pair or group of galaxies, while the UGC magnitude applies to more
than one of the members. The UGC magnitude is the one quoted.
R = The UGC carries no magnitude so the CGCG magnitude is given.
S = As for N, but the UGC magnitude is more than 1 magnitude brighter
than the CGCG magnitude. The UGC magnitude is given.
T = Similar case to Q except that the UGC and CGCG roles are reversed.
The UGC magnitude is given.
W = The magnitude listed here for each of the components of a galaxy
group is the magnitude given the entire galaxy or galaxy group
by the UGC.
X = Combination of W and P.
Z = The position was changed to agree with the CGCG position because
the UGC position was found to be in error.
Note (2): The flags relative to VV and VCV catalogues are described
in Section IX.B of the printed edition:
A = V10 has the same coordinates as V29 in the Atlas. The UGC name
was used to confirm that the coordinate is correct for V29 and
erroneous for V10. The UGC position for V10 = UGC 10814 was adopted.
B = The V position is substantially different (>400") from positions
for the object in other catalogs. The V position has been assumed
to be in error because two or more other catalogs agree on a
different position. The UGC position has been adopted.
C = Same as for B, but the position from the Master List of Non-Stellar
Sources (Dixon and Sonneborn 1980; the ML) has been adopted.
D = The V position differs from that of the ML for the object.
By use of overlays with the sky surveys, it has been established
that the V position is in error so the ML position has been adopted.
E = Same as for D, except that the ML position is not adequate either
so a new position has been derived from the overlay which is
accurate to about 1'.
S1 = Seyfert type 1 galaxy.
S2 = Seyfert type 2 galaxy.
S3 = Seyfert type 3 galaxy, or "Liner".
S or S? = Probably or possibly a Seyfert.
H2 = Galaxy dominated by nuclear HII-regions, or "Starburst" nucleus.
BL = BL Lac object.
AN = "Active Nucleus". This flag is used when Veron-Cetty and Veron
show no type for the object.
Historical Notes:
* From the "Selected Astronomical Catalogs" Vol. 1 CD-ROM (1992)
directory nonstell/galaxies/irasgal
* 10-Jan-1995: set to blank the column 103 of file "xcat" which contained
the values 0, 1 or 2 (identical to the tens of RAh) for the records:
# 1847 = IRAS 03216+7240
# 1952 = IRAS 03354+6633
# 2018 = IRAS 03434+6757
# 3437 = IRAS 07193+2211
# 4261 = IRAS 09065+5015
# 4325 = IRAS 09133+7431
# 5827 = IRAS 11463-6929
# 6278 = IRAS 12234+1315
# 7150 = IRAS 13317-4517
# 9810 = IRAS 19184-7404
#10378 = IRAS 21021+0927
#11367 = IRAS 23448+0139
The explanations of the flags PosFlg, MagFlg and VCVFlg have been added.
* 04-Dec-2002: Corrected the units of DisSSS and DSNGal which are
arcsec's, not arcmin's ! (thanks to Sally Hales, MRAO Cambridge)
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(End) Francois Ochsenbein [CDS] 07-Jan-1995