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J/A+A/379/453  CCD BVI photometry of 5 open cluster candidates  (Piatti+, 2001)

On the nature of five open cluster candidates projected close to the Galactic centre Piatti A.E., Claria J.J. <Astron. Astrophys. 379, 453 (2001)> =2001A&A...379..453P
ADC_Keywords: Clusters, open ; Photometry, CCD Keywords: open clusters and associations: individual: Ruprecht 103, 124, 129, 146, and 166 - open clusters and associations : general Abstract: We present CCD BVI observations obtained for 1759 stars in 4'x4' regions around the unstudied southern stellar aggregates Ruprecht 103, 124, 129, 146 and 166, which are described as open clusters in several catalogues. Our analysis shows that none of these stellar groups are genuine open clusters since no clear main sequences or other meaningful features can be seen in their colour-magnitude diagrams. Star counts carried out within and outside the cluster candidate fields not only support these results but also show that the studied objects do not appear to be candidate late stages of star cluster dynamical evolution. Objects: ----------------------------------------- RA (2000) DE Designation(s) ----------------------------------------- 12 15 54 -58 25.0 Cl Ruprecht 103 17 28 00 -40 46.0 Cl Ruprecht 124 17 47 18 -29 36.0 Cl Ruprecht 129 18 52 36 -21 07.0 Cl Ruprecht 146 13 26 06 -63 25.0 Cl Ruprecht 166 ----------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 70 163 Stars in the field of Ruprecht 103 table3.dat 70 424 Stars in the field of Ruprecht 124 table4.dat 70 55 Stars in the field of Ruprecht 129 table5.dat 70 163 Stars in the field of Ruprecht 146 table6.dat 70 954 Stars in the field of Ruprecht 166
Byte-by-byte Description of file: table[2-6].dat
Bytes Format Units Label Explanations
4- 6 I3 --- ID Star number 8- 14 F7.3 pix Xpix X coordinate (1) 16- 22 F7.3 pix Ypix Y coordinate (1) 24- 29 F6.3 mag Vmag V magnitude 32- 36 F5.3 mag e_Vmag rms uncertainty on Vmag 39- 44 F6.3 mag B-V B-V colour index 47- 51 F5.3 mag e_B-V rms uncertainty on B-V 54- 59 F6.3 mag V-I V-I colour index 62- 66 F5.3 mag e_V-I rms uncertainty on V-I 70 I1 --- o_Vmag Number of measurements
Note (1): For all fields, 1 pix = 0.45". North is up and East is to the left. Positions for the centres of the circles drew in Fig. 1: Object X (pixels) Y(pixels) ----------------------------------- Ru103 180 240 Ru124 260 285 Ru129 220 265 Ru146 240 300 Ru146 240 300 ----------------------------------- None of these stellar groups are genuine open clusters, so that the above centres only refers to positions around which the stellar density is higher than in any other region of the observed fields.
Acknowledgements: Andres Piatti
(End) Patricia Bauer [CDS] 12-Nov-2001
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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