J/ApJS/150/367 Globular clusters in NGC 5128 (Peng+, 2004)
The globular cluster system of NGC 5128. I. Survey and catalogs.
Peng E.W., Ford H.C., Freeman K.C.
<Astrophys. J. Suppl. Ser., 150, 367-385 (2004)>
=2004ApJS..150..367P 2004ApJS..150..367P
ADC_Keywords: Clusters, globular ; Photometry, UBVRI ; Radial velocities
Keywords: galaxies: elliptical and lenticular, cD - galaxies: halos -
galaxies: individual (NGC 5128) - galaxies: star clusters - catalogs
Abstract:
We present the results of a photometric and spectroscopic survey of
the globular cluster (GC) system of NGC 5128 (Centaurus A), a galaxy
whose proximity makes it an important target for early-type galaxy
studies. We imaged three fields in UBVRI that extend 50 and 30kpc
along the major and minor axes, respectively. We used both color and
size information to develop efficient selection criteria for
differentiating between star clusters and foreground stars. In total,
we obtained new velocities for 138 globular clusters, nearly tripling
the number of known clusters, and bringing the confirmed total in
NGC 5128 to 215. We present a full catalog of all known GCs, with
their positions, photometry, and velocities. In addition, we present
catalogs of other objects observed, such as foreground stars,
background galaxies, three Galactic white dwarfs, seven background
QSOs, and 52 optical counterparts to known X-ray point sources. We
also report an observation of the cluster [HGH92] G169, in which we
confirm the existence of a bright emission line object. This object,
however, is unlikely to be a planetary nebula, but may be a supernova
remnant.
Description:
We conducted our imaging survey with the Mosaic II optical CCD camera
on the Blanco 4 m telescope at Cerro Tololo Inter-American observatory
(CTIO). We observed three fields with Mosaic II, which has 0.26"
pixels and a 0.5" field of view. We imaged through the Johnson-Cousins
UBVRI filters on the nights of 2000 June 1-3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 124 215 Catalog of NGC 5128 GCs with Radial Velocities
table6.dat 98 222 Catalog of Confirmed Foreground Stars in
Vicinity of NGC 5128
table7.dat 95 14 Catalog of Confirmed Background Galaxies in
Vicinity of NGC 5128
table8.dat 93 52 Catalog of Confirmed Foreground Stars in
Vicinity of NGC 5128
table9.dat 67 10 White Dwarfs and QSOs in the Field of NGC 5128
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See also:
J/A+A/369/812 : UVKs photometry of NGC 5128 globular clusters (Rejkuba, 2001)
J/ApJ/600/716 : NGC 5128 Chandra X-ray point sources (Minniti+, 2004)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- GC Globular cluster name (G1)
12- 13 I2 h RAh Hour of Right Ascension (J2000)
15- 16 I2 min RAm Minute of Right Ascension (J2000)
18- 22 F5.2 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I2 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of Declination (J2000)
36- 40 F5.2 arcmin Rad Projected radius
42- 48 F7.3 arcmin Xdist Coordinate along the NGC 5128 major axis (1)
50- 56 F7.3 arcmin Ydist Coordinate along the NGC 5128 minor axis (2)
58- 62 F5.2 mag Vmag ? The V band magnitude
64- 67 F4.2 mag U-B ? The (U-B) color index
69- 72 F4.2 mag B-V ? The (B-V) color index
74- 77 F4.2 mag V-R ? The (V-R) color index
79- 82 F4.2 mag V-I ? The (V-I) color index
84- 87 F4.2 mag e_Umag ? Error in the U band magnitude
89- 92 F4.2 mag e_Bmag ? Error in the B band magnitude
94- 97 F4.2 mag e_Vmag ? Error in the V band magnitude
99-102 F4.2 mag e_Rmag ? Error in the R band magnitude
104-107 F4.2 mag e_Imag ? Error in the I band magnitude
109-111 I3 km/s HRV Heliocentric velocity
113-114 I2 km/s e_HRV Error in HRV (3)
116-119 F4.2 mag E(B-V) ? Schlegel, Finkbeiner, & Davis
(1998ApJ...500..525S 1998ApJ...500..525S) reddening
121-123 I3 --- Run ? Observing run (G2)
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Note (1): Major axis at PA = 35 degrees. Positive to the northeast as in H95.
Note (2): Positive to the northwest.
Note (3): If the velocity is from the literature, then we assume an error
of 65km/s.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Star Confirmed foreground star name, pff_fs-NNN
12- 13 I2 h RAh Hour of Right Ascension (J2000)
15- 16 I2 min RAm Minute of Right Ascension (J2000)
18- 22 F5.2 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I2 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of Declination (J2000)
36- 40 F5.2 mag Vmag ? The V band magnitude
42- 46 F5.2 mag U-B ? The (U-B) color index
48- 51 F4.2 mag B-V ? The (B-V) color index
53- 56 F4.2 mag V-R ? The (V-R) color index
58- 61 F4.2 mag V-I ? The (V-I) color index
63- 66 F4.2 mag e_Umag ? Error in the U band magnitude
68- 71 F4.2 mag e_Bmag ? Error in the B band magnitude
73- 76 F4.2 mag e_Vmag ? Error in the V band magnitude
78- 81 F4.2 mag e_Rmag ? Error in the R band magnitude
83- 86 F4.2 mag e_Imag ? Error in the I band magnitude
88- 91 I4 km/s HRV Heliocentric velocity
93- 94 I2 km/s e_HRV Error in HRV
96- 97 I2 --- Run Observing runs (G2)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Galaxy Confirmed background galaxy name, pff_galx-0NN
14- 15 I2 h RAh Hour of Right Ascension (J2000)
17- 18 I2 min RAm Minute of Right Ascension (J2000)
20- 24 F5.2 s RAs Second of Right Ascension (J2000)
26 A1 --- DE- Sign of the Declination (J2000)
27- 28 I2 deg DEd Degree of Declination (J2000)
30- 31 I2 arcmin DEm Arcminute of Declination (J2000)
33- 36 F4.1 arcsec DEs Arcsecond of Declination (J2000)
38- 42 F5.2 mag Vmag ? The V band magnitude
44- 48 F5.2 mag U-B ? The (U-B) color index
50- 53 F4.2 mag B-V ? The (B-V) color index
55- 58 F4.2 mag V-R ? The (V-R) color index
60- 63 F4.2 mag V-I ? The (V-I) color index
65- 68 F4.2 mag e_Umag ? Error in the U band magnitude
70- 73 F4.2 mag e_Bmag ? Error in the B band magnitude
75- 78 F4.2 mag e_Vmag ? Error in the V band magnitude
80- 83 F4.2 mag e_Rmag ? Error in the R band magnitude
85- 88 F4.2 mag e_Imag ? Error in the I band magnitude
90- 93 F4.2 --- z Redshift
95 I1 --- Run Observing run (G2)
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [K-]
3- 5 I3 --- Kraft Kraft et al., 2001, Cat. J/ApJ/560/675 number
(NNN, [KKF2001] NNN in Simbad)
7- 16 A10 --- Name Other name (G1)
18- 19 I2 h RAh Hour of Right Ascension (J2000)
21- 22 I2 min RAm Minute of Right Ascension (J2000)
24- 28 F5.2 s RAs Second of Right Ascension (J2000)
30 A1 --- DE- Sign of the Declination (J2000)
31- 32 I2 deg DEd Degree of Declination (J2000)
34- 35 I2 arcmin DEm Arcminute of Declination (J2000)
37- 41 F5.2 arcsec DEs Arcsecond of Declination (J2000)
43- 47 F5.2 mag Vmag ? The V band magnitude
49- 53 F5.2 mag U-B ? The (U-B) color index
55- 58 F4.2 mag B-V ? The (B-V) color index
60- 63 F4.2 mag V-R ? The (V-R) color index
65- 68 F4.2 mag V-I ? The (V-I) color index
70- 73 F4.2 mag e_Umag ? Error in the U band magnitude
75- 78 F4.2 mag e_Bmag ? Error in the B band magnitude
80- 83 F4.2 mag e_Vmag ? Error in the V band magnitude
85- 88 F4.2 mag e_Rmag ? Error in the R band magnitude
90- 93 F4.2 mag e_Imag ? Error in the I band magnitude
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name White dwarf or QSO name (1)
12- 13 I2 h RAh Hour of Right Ascension (J2000)
15- 16 I2 min RAm Minute of Right Ascension (J2000)
18- 22 F5.2 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I2 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of Declination (J2000)
36- 40 F5.2 mag Vmag The V band magnitude
42- 46 F5.2 mag U-B The (U-B) color index
48- 51 F4.2 mag B-V The (B-V) color index
53- 57 F5.2 mag V-R The (V-R) color index
59- 63 F5.2 mag V-I The (V-I) color index
65- 67 F3.1 --- z ? Redshift
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Note (1): pff-wd-N for white dwarfs, pff_qso-N for QSO
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Global notes:
Note (G1): Names are written as follows:
pff_gc-NNN: this work
HGHH-GNNN: [HGH92] GNNN in Simbad
R2NN: [R2001b] f2.GC-NN in Simbad
VHH81-NN: [VHH81] NN in Simbad
HHH86-NN: [VHH81] NN in Simbad
HGHH-NN: [VHH81] NN in Simbad
MAGJM-NN: [MAG95] NN in Simbad
Note (G2): Observing runs:
1 = the 2dF 2001 run
2 = the Hydra 2001 run
3 = the 2dF 2002 run
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2004