J/A+A/406/867 Mid-IR galaxies in Virgo cluster. III. (Boselli+, 2003)
Mid-IR emission of galaxies in the Virgo cluster. III. The data.
Boselli A., Sauvage M., Lequeux J., Donati A., Gavazzi G.
<Astron. Astrophys. 406, 867 (2003)>
=2003A&A...406..867B 2003A&A...406..867B
ADC_Keywords: Clusters, galaxy ; Galaxies, IR ; Morphology
Keywords: galaxies: general - galaxies: spiral - galaxies: ISM -
stars: formation
Abstract:
We present ISOCAM imaging data at 6.75 and 15µm for 145 galaxies in
the Virgo cluster and in the Coma/A1367 supercluster. Of these, 99
form a complete, optically-selected, volume-limited sample including
galaxies in the core and in the periphery of the Virgo cluster,
suitable for statistical analysis. 34 of the Virgo galaxies were
resolved by ISOCAM: for these objects we present mid-IR images, radial
light and colour profiles, as well as effective and isophotal radii,
surface brightness and light concentration indices.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 161 145 The target galaxies
table2.dat 105 145 The results of the observations
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See also:
VII/49 : Galaxies and Clusters of Galaxies (CGCG) (Zwicky, 1968)
J/AJ/90/1681 : The Virgo Cluster Catalog (VCC) (Binggeli+, 1985)
J/A+AS/121/507 : Near-IR surface photometry of Virgo galaxies (Boselli+, 1997)
J/A+A/402/37 : UV to radio SED of galaxies in Virgo cluster (Boselli+, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Group Group (G1)
4- 15 A12 --- Name VCC or CGCG name
17- 20 I4 --- UGC ? UGC number
22- 25 I4 --- NGC/IC ? NGC or IC number
27- 28 I2 h RAh Right ascension (J2000.0) (9)
30- 31 I2 min RAm Right ascension (J2000.0) (9)
33- 37 F5.2 s RAs Right ascension (J2000.0) (9)
39 A1 --- DE- Declination sign (J2000.0) (9)
40- 41 I2 deg DEd Declination (J2000.0) (9)
43- 44 I2 arcmin DEm Declination (J2000.0) (9)
46- 49 F4.1 arcsec DEs Declination (J2000.0) (9)
51- 62 A12 --- MType Morphological type (2)
64- 68 F5.2 mag mpg Photographic magnitude (3)
70- 74 F5.2 arcmin aaxis Major optical diameter (4)
76- 79 F4.2 arcmin baxis Minor optical diameter (4)
81- 84 F4.1 Mpc Dist Distance (5)
86- 91 A6 --- Memb Cluster membership (6)
92- 96 F5.2 deg theta Projected angular distance from the cluster
centre (M 87) (7)
98-102 F5.2 --- C31(K) ? K-band C31(K) concentration index (8)
104-108 F5.2 --- C31(B) ? B-band C31(B) concentration index (8)
110-161 A52 --- Remarks Notes on morphological type
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Note (2): Morphological type, from the VCC (Binggeli et al., 1985, Cat.
J/AJ/90/1681) or from Binggeli et al. (1993A&AS...98..275B 1993A&AS...98..275B)
for Virgo galaxies, from Gavazzi & Boselli (1996ApL&C..35....1G 1996ApL&C..35....1G)
for the other objects.
Note (3): Photographic magnitude from the VCC for the Virgo galaxies,
from the CGCG for the other objects.
Note (4): Diameters determined at the surface brightness of 25mag/arcsec2.
From the UGC (when available) or consistently determined by us.
For VCC galaxies the diameter is computed from the "last visible"
isophotal diameter given in the VCC using:
Logaext(Bext)=0.99Loga(b)+0.1
Note (5): Distances to the various substructures of Virgo are as given
in Gavazzi et al. (1999MNRAS.304..595G 1999MNRAS.304..595G). A distance of 96 and 91.3Mpc
is assumed for galaxies in Coma and A1367 respectively. For galaxies
not belonging to the clusters, the distance is determined from the
redshift assuming H0=75km/s/Mpc.
Note (6): Cluster membership as defined in
Gavazzi et al. (1999MNRAS.304..595G 1999MNRAS.304..595G) for Virgo and in
Gavazzi et al. (1999A&AS..136..227G 1999A&AS..136..227G) for the Coma/A1367 supercluster.
Codes A, B, M, W, S, N and E are for clusters A and B, M and W clouds,
southern extension, N and E substructures respectively.
Note (7): Among the ISO Virgo galaxies, the core subsample is composed
by all objects with θ<2 degrees
Note (8): Concentration indices, defined as the model independent ratio
between the radii that enclose 75% and 25% of the total light, from
Gavazzi et al. (2000, Cat. J/A+A/361/863) and Gavazzi et al., in
preparation.
Note (9): celestial coordinates with few arcsec accuracy, from the VCC
(Cat. J/AJ/90/1681), or measured by us on the DSS.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Group Group (G1)
4- 15 A12 --- Name VCC or CGCG designation
17- 19 A3 --- Raster Raster map
21- 25 F5.2 arcmin FOV Total field of view
26 A1 --- --- [x]
27- 29 F3.1 arcmin FOV2 ? Total field of view
31- 34 F4.2 s Tini Elementary integration time
36 A1 --- l_F6.75um Limit flag on F6.75um
37- 43 F7.2 mJy F6.75um ?=- Flux density at 6.75um
45- 49 F5.2 mJy e_F6.75um ? rms uncertainty on F6.75um
51- 55 F5.1 uJy/arcsec2 Bg6.75 ?=- Background surface brightness at
6.75um
57- 59 F3.1 uJy/arcsec2 e_Bg6.75 ?=- Uncertainty on the sky determination
on Bg6.75um (2)
61- 63 F3.1 uJy/arcsec2 p6.75 ?=- Pixel noise on Bg6.75um
65 I1 --- q_F6.75um ?=- Quality flag on 6.75um data (3)
67 A1 --- l_F15um Limit flag on F15um
68- 74 F7.2 mJy F15um Flux density at 15um
76- 81 F6.2 mJy e_F15um ? rms uncertainty on F6.75um
83- 88 F6.1 uJy/arcsec2 Bg15 Background noise per pixel at 15um
90- 92 F3.1 uJy/arcsec2 e_Bg15 Uncertainty on the sky determination
on Bg15um (2)
94- 96 F3.1 uJy/arcsec2 p15 Pixel noise on Bg15um (2)
98 I1 --- q_F15um ?=- Quality flag on 15um data (3)
100 A1 --- Notes [*] Individual notes (4)
102-105 I4 --- Target ? Target name of the frame where the
galaxy was detected
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Note (2): σ(s)λ and σ(p)λ are given in
units of mJy per 6"x6".
Note (3): Quality flags as follows:
1 = high signal to noise images with a flat sky background
2 = low signal to noise data, for images with strong residual
gradients in the sky background, for objects where the transient
memory of the bright nucleus is not perfectly corrected and
partly contaminates the disc emission in the reduced image, or
for those objects whose photometric parameters differ by more
than ∼30% when images are reduced using different parameters
3 = tentative detection
Note (4): Notes for sources:
VCC 890: in the same frame of VCC 899.
VCC 1508: at 15µm t(int)=2.1s.
VCC 1632: at 15µm t(int)=2.1s.
VCC 1673: in the same frame of VCC 1676.
VCC 1676: in the same frame of VCC 1673.
VCC 1686: the given value is the average value obtained from the
pointed observation of VCC 1686 and that extracted from
the image of the nearby VCC 1690.
VCC 1929: in the same frame of VCC 1932.
VCC 1932: in the same frame of VCC 1929.
VCC 1226: images taken with a pixel size of 3 arcsec.
VCC 1939: images taken with a pixel size of 3 arcsec.
CGCG 43041: at 15µm t(int)=2.1 s.
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GLobal notes:
Note (G1): Groups are abbreviated as follows:
G1 = The ISO Virgo sample
G2 = The Virgo serendipitous sample
G3 = Other galaxies in the Virgo cluster
G4 = Galaxies in the clusters A1367 and Coma
History:
* 22-Sep-2003: From electronic version of the journal
* 03-Jul-2006 : table2 added
References:
Boselli et al., Paper I 1997A&A...324L..13B 1997A&A...324L..13B
Boselli et al., Paper II 1998A&A...335...53B 1998A&A...335...53B
(End) James Marcout, Patricia Bauer [CDS] 22-Sep-2003