J/A+A/380/441 Galaxies behind Southern Milky Way. II. (Woudt+, 2001)
A catalogue of galaxies behind the Southern Milky Way.
II. The Crux and Great Attractor regions (l=289-338°)
Woudt P.A., Kraan-Korteweg R.C.
<Astron. Astrophys. 380, 441 (2001)>
=2001A&A...380..441W 2001A&A...380..441W
ADC_Keywords: Clusters, galaxy ; Galaxies, optical ; Galaxies, IR ; Morphology
Keywords: catalogues - surveys - ISM: dust, extinction -
galaxies: fundamental parameters -
cosmology: large-scale structure of the Universe
Abstract:
In this second paper of the catalogue series of galaxies behind the
southern Milky Way, we report on the deep optical galaxy search in the
Crux region (289°≲l≲318° and -10°≲b≲10°) and the
Great Attractor region (316°≲l≲338° and
-10°≲b≲10°). The galaxy catalogues are presented, a brief
description of the galaxy search given, as well as a discussion on the
distribution and characteristics of the uncovered galaxies. A total of
8183 galaxies with major diameters D≳0.2 arcmin were identified in
this ∼850 square degree area: 3759 galaxies in the Crux region and
4423 galaxies in the Great Attractor region. Of the 8183 galaxies, 229
(2.8%) were catalogued before in the optical (3 in radio) and 251
galaxies have a reliable (159), or likely (92) cross-identification in
the IRAS Point Source Catalogue (3.1%). A number of prominent
overdensities and filaments of galaxies are identified. They are not
correlated with the Galactic foreground extinction and hence
indicative of extragalactic large-scale structures. Redshifts obtained
at the South African Astronomical Observatory (SAAO) for 518 of the
newly catalogued galaxies in the Crux and Great Attractor regions
(Fairall et al., 1998, Cat. J/A+AS/127/463; Woudt et al., 1999, Cat.
J/A+A/352/39) confirm distinct voids and clusters in the area here
surveyed. With this optical galaxy search, we have reduced the width
of the optical `Zone of Avoidance' for galaxies with
extinction-corrected diameters larger than 1.3' from extinction levels
A_B≳1.0mag to A_B≳3.0mag: the remaining optical Zone of Avoidance is
now limited by |b|≲3° (see Fig. 16).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 163 8183 Galaxies behind the southern Milky Way
table3.dat 140 342 IRAS galaxies behind the southern Milky Way
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See also:
VII/209 : Galaxies Behind the Milky Way (Saito+ 1990-91; Roman+ 1996-98)
J/A+AS/141/123 : Galaxies behind Southern Milky Way (Kraan-Korteweg 2000)
J/A+A/352/39 : Great Attractor region redshifts (Woudt+, 1999)
J/A+AS/127/463 : Crux region redshifts (Fairall+ 1998)
J/ApJS/89/57 : IRAS galaxies behind southern Milky Way (Yamada+, 1993)
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- WKK98 Running number of identified galaxy (1)
7- 14 A8 --- OtherID Other optical identification
16- 17 A2 --- Code Code for cross-identification in IRAS PSC (G1)
20- 21 I2 h RA1h Right ascension (B1950)
23- 24 I2 min RA1m Right ascension (B1950)
26- 29 F4.1 s RA1s Right ascension (B1950)
31 A1 --- DE1- Declination sign (B1950)
32- 33 I2 deg DE1d Declination (B1950)
35- 36 I2 arcmin DE1m Declination (B1950)
38- 39 I2 arcsec DE1s Declination (B1950)
42- 43 I2 h RAh Right ascension (J2000)
45- 46 I2 min RAm Right ascension (J2000)
48- 51 F4.1 s RAs [0/60] Right ascension (J2000)
53 A1 --- DE- Declination sign (J2000)
54- 55 I2 deg DEd Declination (J2000)
57- 58 I2 arcmin DEm Declination (J2000)
60- 61 I2 arcsec DEs [0/60] Declination (J2000)
64- 69 F6.2 deg GLON Galactic longitude
71- 76 F6.2 deg GLAT Galactic latitude
79- 81 A3 --- ESOField ESO/SRC Field number
83- 88 F6.1 mm Xpos X coordinate in mm from center of field
90- 95 F6.1 mm Ypos Y coordinate in mm from center of field
97- 99 I3 arcsec amaj Major axis (arcsec)
100 A1 --- --- [x]
101-103 I3 arcsec amin Minor axis (arcsec)
105-108 F4.1 mag B25mag Estimated B25 magnitude
110-113 F4.2 mag E(B-V) Extinction E(B-V) according to Schlegel et al.
1998ApJ...500..525S 1998ApJ...500..525S
115-126 A12 --- MType Morphological type (2)
127-162 A36 --- Rem Remarks
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Note (1): No. 1 to 3760: The Crux region
No. 3761 to 8183: The Great Attractor region
Note (2): Morphological classification (from Kraan-Korteweg, 2000,
Cat. J/A+AS/141/123)
The morphological types are coded similarly to the precepts of the RC2
(de Vaucouleurs et al., 1976, Cat. VII/112). Due to the varying
foreground extinction a homogenous and detailed type classification
could not always be accomplished and some codes were added.
- In the first column (byte 115), a question mark denotes the
uncertainty about the galaxian nature of the object.
- In the second column (bytes 117-121), the code F for the Hubble type
E-S0 (T=-3 in the RC2 classification) was added to the normal
designations of E, L, S and I.
- In byte 131, the subtypes E, M and L are introduced next to the
general subtypes 0 to 9. They stand for early spiral (S0/a-Sab),
middle spiral (Sb-Sd) and late spiral or irregular (Sdm-Im). The
cruder subtypes are a direct indication of the fewer details visible
on the obscured galaxy image.
- The questionmark at the end marks uncertainty of the main type, the
colon uncertainty in the subtype.
- The third column (byte 123) marks the orientation of the galaxy:
E, N, F, V stands for edge-on, nearly edge-on, face-on and nearly
face-on.
- The fourth subcolumn (byte 125) indicates the superposition of a
single star (1) or multiple stars (S) on the galaxy.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [I] for IRAS name
2- 11 A10 --- IRAS Identification in IRAS PSC (Cat. II/125)
14 A1 --- Yamada [Y*] Cross-identification in Yamada et al.,
1993, Cat. J/ApJS/89/57 (1)
17- 18 A2 --- Code Category of identification (G1)
20- 23 I4 --- WKK98 Running number of identified galaxy
(from Table 1)
25 A1 --- ESO [L] Identification in Lauberts catalog
(1982, Cat. VII/34)
28- 29 I2 h RA1h Right ascension (B1950)
31- 32 I2 min RA1m Right ascension (B1950)
34- 37 F4.1 s RA1s Right ascension (B1950)
39 A1 --- DE1- Declination sign (B1950)
40- 41 I2 deg DE1d Declination (B1950)
43- 44 I2 arcmin DE1m Declination (B1950)
46- 47 I2 arcsec DE1s Declination (B1950)
50- 55 F6.2 deg GLON Galacitic longitude
57- 62 F6.2 deg GLAT Galacitic latitude
64- 66 I3 arcsec amaj Major axis (arcsec)
67 A1 --- --- [x]
68- 70 I3 arcsec amin Minor axis (arcsec)
72- 75 F4.1 mag B25mag Estimated B25 magnitude
79- 83 A5 --- MType Morphological type
85- 87 I3 arcsec DeltaPos Positional offset in arcsec (IRAS - optical)
89- 94 F6.2 Jy F12um Flux density at 12 micron
96-101 F6.2 Jy F25um Flux density at 25 micron
103-108 F6.2 Jy F60um Flux density at 60 micron
110-115 F6.2 Jy F100um Flux density at 100 micron
118 A1 --- q_F12um Flux quality at 12 micron (2)
120 A1 --- q_F25um Flux quality at 25 micron (2)
122 A1 --- q_F60um Flux quality at 60 micron (2)
124 A1 --- q_F100um Flux quality at 100 micron (1)
127-132 F6.2 --- IRAS1 IRAS color 1: (f12 x f25) / (f60 x f60)
134-139 F6.2 --- IRAS2 IRAS color 2: f100 / f60
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Note (1): Y: galaxy listed by Yamada et al., 1993, Cat. J/ApJS/89/57
*: the IRAS PSC source satisfies all the Yamada et al. selection
criteria, yet was not listed in Yamada's catalogue.
Note (2): The IRAS flags are coded as:
1 = lower limit
2 = uncertain flux
3 = good flux quality
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Global notes:
Note (G1): Quality of the IRAS cross-correlation is explained in the paper.
They are schematically:
I = certain IRAS connection
P = possible match in the IRAS PSC
Q = questionable (unlikely) match in the IRAS PSC
The code may be followed by a number indicating the equally
possible galaxy counterparts for a given IRAS source.
N = cross-identification is not accepted
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History: On 12-Apr-2002, in table1.dat,
For WKK98 2542, L174-001 modified in L174-B 1
For WKK98 7328, FGC1256 modified in FGCE 1256
Acknowledgements: Patrick Woudt
(End) Patricia Bauer [CDS] 06-Nov-2001