J/MNRAS/389/285 Proper motions and JHK of 24 Berkeley clusters (Tadross, 2008)
A Catalogue of previously unstudied Berkeley clusters.
Tadross A.L.
<Mon. Not. R. Astron. Soc., 389, 285-291 (2008)>
=2008MNRAS.389..285T 2008MNRAS.389..285T
ADC_Keywords: Clusters, open ; Positional data ; Proper motions ;
Photometry, infrared
Keywords: catalogues - surveys - Hertzsprung-Russell (HR) diagram -
open clusters and associations: general -
open clusters and associations: individual: Berkeley
Abstract:
The main astrophysical parameters of 24 previously unstudied open
clusters of Berkeley catalogue are presented here. JHK near-infrared
(Two Micron All Sky Survey, Cat. II/246) photometry and the proper
motions astrometry of Naval Observatory Merged Astrometric Dataset
(NOMAD, Cat. I/297) are used. The clusters' centres, angular
diameters, ages, distances and colour excesses for these clusters are
estimated for the first time.
Description:
The Naval Observatory Merged Astrometric Dataset (NOMAD) contains
astrometric and photometric data for over 1 billion stars derived from
the Hipparcos, Tycho-2, UCAC2 and USNO-B1.0 catalogues for astrometry
and optical photometry, supplemented by Two Micron All Sky Survey
(2MASS) near-infrared photometry. For each unique star the 'best'
astrometric and photometric data are chosen from the source catalogues
and merged into a single dataset (cf. Zacharias et al., 2004, Cat.
I/297). Using this data base; compared with the 2MASS of Cutri et
al. (2003, Cat. II/246); we could determine the fundamental
parameters of 24 (of 96) open clusters of Berkeley, which were never
studied so far.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 53 24 The equatorial & galactic positions and the
diameters of our investigated clusters, as
taken from 'WEBDA' and 'DIAS'
catalog.dat 116 90615 Star positions, absolute proper motions and
JHK observation
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See also:
B/ocl : Optically visible open clusters and Candidates (Dias+ 2002-2007)
I/297 : NOMAD Catalog (Zacharias+ 2005)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- --- [Berkeley]
10- 12 I3 --- Berk Cluster number
14- 15 I2 h RAh Right ascension (J2000)
17- 18 I2 min RAm Right ascension (J2000)
20- 21 I2 s RAs Right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 31 I2 arcsec DEs Declination (J2000)
33- 39 F7.3 deg GLON Galactic longitude
41- 46 F6.3 deg GLAT Galactic latitude
48 I1 arcmin Diam Diameter
50- 53 I4 --- Nstar Number of stars in the cluster with
measurements in catalog.dat file
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Byte-by-byte Description of file: catalog.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- --- [Berkeley]
10- 12 I3 --- Berk Cluster number
14- 18 I5 --- Star Star sequential number (WEDBA number)
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 30 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33- 34 I2 deg DEd Declination (J2000)
36- 37 I2 arcmin DEm Declination (J2000)
39- 43 F5.2 arcsec DEs Declination (J2000)
45- 50 F6.1 mas/yr pmRA Absolute proper motion along RA
52- 57 F6.1 mas/yr pmDE Absolute proper motion along DE
59- 63 F5.1 mas/yr e_pmRA ?=0.0 rms uncertainty on pmRA
65- 69 F5.1 mas/yr e_pmDE ?=0.0 rms uncertainty on pmDE
71- 76 F6.3 mag Jmag ?=- 2MASS J magnitude
79- 84 F6.3 mag Hmag ?=- 2MASS H magnitude
87- 92 F6.3 mag Kmag ?=- 2MASS K magnitude
95-100 F6.3 mag J-H ?=- J-H colour index
103-108 F6.3 mag H-K ?=- H-K colour index
111-116 F6.3 mag J-K ?=- J-K colour index
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History:
Copied at http://www.univie.ac.at/webda
(End) Patricia Vannier [CDS] 14-Jan-2010