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J/A+AS/144/5 Nearby globular clusters photometric catalog (Rosenberg+, 2000)
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Photometric catalog of nearby globular clusters.
I. A large homogeneous (V,I) color-magnitude diagram data-base.
Rosenberg A., Piotto G., Saviane I., Aparicio A.
<Astron. Astrophys. Suppl. Ser. 144, 5 (2000)>
=2000A&AS..144....5R
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ADC_Keywords: Clusters, globular ; Photometry, UBVRI ; Radial velocities ;
Abundances, [Fe/H]
Keywords: astronomical data base: miscellaneous - catalogs -
stars: Hertzsprung-Russel (HR) - stars: population II -
globular clusters: general
Abstract:
We present the first part of the first large and homogeneous CCD
color-magnitude diagram (CMD) data base, comprising 52 nearby Galactic
globular clusters (GGC) imaged in the V and I bands using only two
telescopes (one for each hemisphere). The observed clusters represent
75% of the known Galactic globulars with (m-M)V<=16.15mag, cover most
of the globular cluster metallicity range (-2.2<=[Fe/H]<=-0.4), and
span Galactocentric distances from ~1.2 to ~18.5kpc.
In this paper, the CMDs for the 39 GGCs observed in the southern
hemisphere are presented. The remaining 13 northern hemisphere
clusters of the catalog are presented in a companion paper. For four
clusters (NGC 4833, NGC 5986, NGC 6543, and NGC 6638) we present for
the first time a CMD from CCD data. The typical CMD span from the
22^nd^ V magnitude to the tip of the red giant branch. Based on a
large number of standard stars, the absolute photometric calibration
is reliable to the ~0.02mag level in both filters.
This catalog, because of its homogeneity, is expected to represent a
useful data base for the measurement of the main absolute and relative
parameters characterizing the CMD of GGCs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 85 39 Identifications, positional data and metallicity
estimates for the observed clusters
table4.dat 72 39 Photometric parameters
table5.dat 66 39 Kinematics, and structural parameters
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See also:
VII/13 : Globular-Cluster Catalog (Arp 1965)
VII/44 : Star Clusters Associations II. Globular Clusters (Ruprecht+ 1981)
VII/103 : Catalogue of Galactic globular clusters (Monella, 1985)
VII/151 : Structure Parameters of Galactic Globular Clusters (Webbink 1985)
II/117 : Catalog of UBVRI Photometry of Globular Clusters (Peterson 1986)
VII/195 : Globular Clusters in the Milky Way (Harris, 1996)
VII/202 : Globular Clusters in the Milky Way (Harris, 1997)
J/A+A/328/83 : Globular clusters luminosity function (Chabrier+ 1997)
J/AJ/109/218 : Catalogue of globular cluster profiles (Trager+ 1995)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID Identification number
4- 11 A8 --- Cluster Cluster name
13- 14 I2 h RAh Right ascension (J2000)
16- 17 I2 min RAm Right ascension (J2000)
19- 22 F4.1 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 32 I2 arcsec DEs Declination (J2000)
34- 39 F6.2 deg GLON Galactic longitude
41- 46 F6.2 deg GLAT Galactic latitude
48- 51 F4.1 kpc Rsun Heliocentric distance (1)
53- 56 F4.1 kpc RGC Galactocentric distances
58- 62 F5.1 kpc X X spatial component toward the
Galactic Center(2)
64- 67 F4.1 kpc Y Y spatial component in direction of
Galactic rotation (2)
69- 73 F5.1 kpc Z Z spatial component towards
North Galactic Plane (2)
75- 79 F5.2 --- [Fe/H]z ? Metallicity given in Rutledge et al.
(1997PASP..109..907R) on the
Zinn & West (1984ApJS...55...45Z) scale (3)
81- 85 F5.2 --- [Fe/H]c ? Metallicity given in Rutledge et al.
(1997PASP..109..907R) on the Carretta &
Gratton (1997, Cat. <J/A+AS/121/95>) scale
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Note (1): Assuming R_{sun}_=8.0kpc
Note (2): spatial components (X,Y,Z) in the Sun-centered coordinate system
(X pointing toward the Galactic center, Y in direction of Galactic
rotation, Z toward North Galactic Pole)
Note (3): For 14 NGC 5139 and 34 NGC 6656, [Fe/H] values were taken directly
from Zinn & West (1984ApJS...55...45Z)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID Identification number
4- 11 A8 --- Cluster Cluster name
13- 16 F4.2 mag E(B-V) Foreground reddening
18- 22 F5.2 mag VHB V magnitude level of the horizontal branch
23 A1 --- n_VHB [*] Note on HB levels (1)
25- 28 F4.2 mag (m-M) Apparent visual distance modulus
30- 34 F5.2 mag IntVmag Integrated V magnitude of the cluster
36- 41 F6.2 mag VMAG Absolute visual magnitude
43- 46 F4.2 mag U-B ? Integrated U-B colour index
48- 51 F4.2 mag B-V ? Integrated B-V colour index
53- 56 F4.2 mag V-R ? Integrated V-R colour index
58- 61 F4.2 mag V-I ? Integrated V-I colour index
63- 66 F4.1 --- S(RR) ? Specific frequency of RR Lyrae variables (2)
68- 72 F5.2 --- HBR ? Horizontal-branch morphological parameter (3)
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Note (1): *: HB levels measured directly on our CMDs.
Note (2): The specific frequency is defined as
S = N_total_*10^0.4((M_V_+15)^, where
N_total_ is the total population, and M_V_ the absolute V magnitude
(Harris, 1991ApJS..76..115H)
Note (3): Lee (1990ApJ...363..159L), HB ratio: HBR=(B-R)/(B+V+R)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID Identification number
4- 11 A8 --- Cluster Cluster name
13- 18 F6.1 km/s HRV ? Heliocentric radial velocity
20- 22 F3.1 km/s e_HRV ? rms uncertainty on HRV
24- 29 F6.1 km/s Vlsr ? Radial velocity relative to the (LSR)
31- 34 F4.2 --- C ? Concentration parameter [C=log(r_t_/r_c_)
35 A1 --- n_C [c] c: core-collapsed cluster
37- 40 F4.2 arcmin Radc Core radius
42- 45 F4.2 arcmin Radh Half mass radius
47- 50 F4.2 [yr] log(tc) Log. of the core relaxation time
52- 55 F4.2 [yr] log(th) ? Log. of the relaxation time at the
half mass radius
57- 61 F5.2 mag/arcsec+2 SuBr Central surface brightness in V
63- 66 F4.2 [solLum/pc+3] rho Log. of central luminosity density
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History: From A&AS electronic version
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(End) James Marcout, Patricia Bauer [CDS] 02-Oct-2000