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J/A+A/400/917       UBVI photometry in NGC 458               (Alcaino+, 2003)

The Small Magellanic Cloud star cluster NGC 458. A new UBVI photometric study. Alcaino G., Alvarado F., Borissova J., Kurtev R. <Astron. Astrophys. 400, 917 (2003)> =2003A&A...400..917A
ADC_Keywords: Magellanic Clouds ; Clusters, open ; Photometry, UBVRI Keywords: stars: Hertzsprung-Russell (HR) and C-M diagrams - galaxies: stellar content - galaxies: Magellanic clouds - galaxies: individual: SMC - galaxies: stars clusters Abstract: We present a new photometry of the Small Magellanic Cloud star cluster NGC 458 in UBVI filters. We determine the reddening E(B-V)=0.04±0.02. By comparison with the isochrones by Bertelli et al. (1994, Cat. J/A+AS/106/275) we derive an age of ∼140Myr. Three candidate blue straggler stars are proposed. The evolved "blue loop'' stars of NGC 458 have masses between 4 and 5M and are hotter than model predictions. Description: Our analysis is based on a set of "blue" UB and "red" VI CCD frames obtained in October 1999 with the 1.3m Warsaw telescope, Las Campanas Observatory with the 2048x2048 CCD camera. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 01 14 54 -71 33.0 NGC 458 = ESO 51- 26 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 67 5488 Photometry of NGC 458 table2.dat 91 30 Blue loop stars in NGC 458
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- AAB Sequential number (Cl* NGC 458 AAB NNNN) 7- 13 F7.2 pix Xpos X position (G1) 16- 22 F7.2 pix Ypos Y position (G1) 24- 29 F6.3 arcmin Dist Distance from cluster's center 32- 38 F7.3 mag U-B ?=100. U-B colour index 40- 46 F7.3 mag B-V ?=100. B-V colour index 48- 54 F7.3 mag V-I ?=100. V-I colour index 56- 61 F6.3 mag Vmag ?=2. V magnitude 63- 67 F5.3 mag e_Vmag rms uncertainty on Vmag
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
2- 3 I2 --- BLS [1/30] Sequential number (Cl* NGC 458 BLS NN) 5- 11 F7.2 pix Xpos X position (G1) 13- 19 F7.2 pix Ypos Y position (G1) 21- 25 F5.3 arcmin Dist Distance from cluster's center 27- 33 F7.3 mag U-B ?=100.000 U-B colour index 35- 40 F6.3 mag B-V B-V colour index 42- 46 F5.3 mag V-I V-I colour index 48- 53 F6.3 mag Vmag V magnitude 55- 60 F6.3 mag Jmag J magnitude 62- 67 F6.3 mag Hmag H magnitude 69- 74 F6.3 mag Kmag K magnitude 76- 80 F5.3 mag V-K V-K colour index 82- 85 I4 K Teff Effective temperature 87- 91 F5.3 [solLum] log(L) Luminosity
Global notes: Note (G1): 1 pix = 0.417"
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 24-Apr-2003
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

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