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J/A+A/381/884       UBVI CCD photometry in NGC 2571          (Giorgi+, 2002)

NGC 2571: An intermediate-age open cluster with a white dwarf candidate. Giorgi E.E., Vazquez R.A., Baume G., Seggewiss W., Will J.-M. <Astron. Astrophys. 381, 884 (2002)> =2002A&A...381..884G
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, UBVRI Keywords: open clusters and associations: individual: NGC 2571 - stars: luminosity function, mass function, H-R diagrams - stars: chemically peculiar, stars: blue stragglers Description: CCD UBVI imaging photometry was carried out in the field of the open cluster NGC 2571. From the analysis of our data we state the cluster is at a distance of 1380±130pc and its age is 50±10x10^6yr. The cluster mass function has a slope larger than a typical Salpeter's law. There are two notorious features in NGC 2571: the cluster contains a high proportion of stars located below the reference line that are serious candidates to be metallic line stars (probably Am-Fm), and shows also a sharp gap along its main sequence that cannot be explained by a random process nor by a biased rejection of cluster members. A striking blue object was detected in the cluster field that could be a white dwarf candidate. We carried out CCD imaging photometry in the Kron-Cousins UBVI system on April 27 and 29, 1994 using a 1024x1024pix CCD with a scale of 0.37"/pix and a field of view of 6.3'x6.3' attached to the 1.54-m Danish telescope at ESO, La Silla, Chile. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 77 1575 Photometric data, spectral types and coordinates of all stars observed in the open cluster NGC 2571
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Sequence number 6- 8 I3 --- Lind ? Number in Lindoff (1968ArA.....4..587L) notation 10- 12 I3 --- Clar ? Number in Claria (1976PASP...88..225C) notation 14- 16 I3 --- Kil ? Number in Kilambi (1978PASP...90..721K) notation 18- 21 A4 --- SpType Spectral Type 22 A1 --- --- [,] 23- 24 A2 --- SpType2 Spectral Type 26 I1 --- r_SpType ? Reference number for SpType (1) 27 A1 --- --- [,] 28 I1 --- r_SpType2 ? Reference number for SpType2 (1) 30- 37 A8 --- Com Comments 39- 45 F7.2 pix Xpos X position (2) 47- 53 F7.2 pix Ypos Y position (2) 55- 59 F5.2 mag Vmag V Kron-Cousins magnitude (3) 61- 65 F5.2 mag B-V B-V Kron-Cousins color index (3) 67- 71 F5.2 mag U-B ? U-B Kron-Cousins color index (3) 73- 77 F5.2 mag V-I ? V-I Kron-Cousins color index
Note (1): 1 = Houk (1982, Cat. III/80) 2 = Lindoff (1968ArA.....4..587L) 3 = Cannon & Pickering (1918-1924, Cat. III/135) Note (2): 1 pix = 0.37". East to the left, North to the top. Note (3): Photometric differences in V, B-V and U-B with Claria (1976PASP...88..225C) star 5: 0.09, -0.14, 0.09 star 21: 0.01, -0.10, 0.15 star 22: 0.10, -0.13, -0.07 star 24: 0.04, -0.13, 0.12 star 27: 0.12, -0.14, -0.04 star 30: 0.31, -0.07, 0.01 star 33: 0.00, -0.23, 0.09 star 38: 0.44, -0.18, 0.07
Acknowledgements: Edgard Giorgi
(End) Patricia Bauer [CDS] 31-Jan-2002
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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