Access to Astronomical Catalogues

← Click to display the menu
J/AJ/127/980     vby and BVI photometry of Omega Cen giants    (Hughes+, 2004)

The giant branches of ω Centauri: multiwavelength observations of evolved stars. Hughes J., Wallerstein G., Van Leeuwen F., Hilker M. <Astron. J., 127, 980-990 (2004)> =2004AJ....127..980H
ADC_Keywords: Clusters, globular ; Stars, giant ; Photometry, uvby Keywords: globular clusters: individual (ω Centauri, NGC 6397) - techniques: photometric Abstract: We have obtained photometric observations in a 182arcmin^2 area, 25' to the north of the center of the globular cluster ω Centauri. The Stroemgren vby and broadband BI filters were used to obtain measurements for some 2500 stars. Preliminary examinations of parts of the data have been presented previously (Hughes & Wallerstein, 2000, Cat. J/AJ/119/1225; Hughes, Wallerstein, & van Leeuwen, 2002, in ASP Conf. Ser. 265, 73). Here we present the complete data set, study the giant branches, and use the B-I color index as a tool for assessing the ages of the populations within ω Cen. Description: The field was observed in 1996 May on the Cerro Tololo Inter-American Observatory (CTIO) 0.9m telescope. Objects: -------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------- 13 26 45.9 -47 28 37 omega Cen = NGC 5139 -------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file position.dat 32 261 Positions, from van Leeuwen et al., 2000, Cat. J/A+A/360/472 table2.dat 94 2554 Multiwavelength Data on ω Centauri (Northern Field)
See also: J/AJ/127/958 : CCD BV photometry on Omega Cen (Rey+, 2004) J/AJ/119/1225 : Stroemgren photometry of Omega Cen & NGC 6397 (Hughes+, 2000) J/A+AS/115/297 : BVRI photometry of Central Field of Omega Cen (Lynga+, 1996) J/AJ/108/1350 : Omega Cen FUV photometry (Whitney+, 1994) J/MNRAS/250/314 : CCD photometry of omega Cen (Noble+ 1991) J/PASP/106/828 : BVRI photometry of Omega Cen (Walker 1994) Byte-by-byte Description of file: position.dat
Bytes Format Units Label Explanations
1- 4 I4 --- HWV IRAF identification number, Cl* NGC 5139 HWV NNNN in Simbad 6- 10 I5 --- Leid van Leeuwen et al. (2000, J/A+A/360/472) proper motion identifier, Cl* NGC 5139 Leid NNNNN in Simbad 13- 21 F9.5 deg RAdeg Right Ascension (ICRS) 24- 32 F9.5 deg DEdeg Declination (ICRS)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- HWV IRAF identification number, Cl* NGC 5139 HWV NNNN in Simbad 6- 10 I5 --- Leid ? van Leeuwen et al. (2000, J/A+A/360/472) proper motion identifier, Cl* NGC 5139 Leid NNNNN in Simbad 12- 18 F7.2 pix Xpos The X pixel coordinate (1) 20- 26 F7.2 pix Ypos The Y pixel coordinate (1) 28- 33 F6.3 mag b-y Stroemgren (b-y) color index 35- 39 F5.3 mag e_b-y Uncertainty in b-y (2) 41- 46 F6.3 mag Vmag The V-band magnitude 48- 52 F5.3 mag e_Vmag Uncertainty in Vmag (2) 54- 59 F6.3 --- m1 The Stroemgren m1 index 61- 65 F5.3 --- e_m1 Uncertainty in m1 (2) 67- 72 F6.3 mag B-I The (B-I) color index 74- 78 F5.3 mag e_B-I Uncertainty in B-I (2) 80- 85 F6.3 mag V-I The (V-I) color index 87- 91 F5.3 mag e_V-I Uncertainty in V-I (2) 93 A1 --- Status [RAC] Status code (3)
Note (1): North is up, West is right. 1 pix = 0.396" Note (2): Uncertainties reflect the sum in quadrature of all the components. Note (3): Status code as follows: R = Rejected A = Accepted C = Confirmed
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 02-Jul-2004
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact