J/A+AS/127/423 VI photometry of Westerlund 1 and 2 (Piatti+ 1998)
Fundamental parameters of the highly reddened young open clusters
Westerlund 1 and 2
Piatti A.E., Bica E., Claria J.J.
<Astron. Astrophys. Suppl. Ser. 127, 423 (1998)>
=1998A&AS..127..423P 1998A&AS..127..423P (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Photometry, CCD
Keywords: open clusters: individual: Weterlund 1, Westerlund 2 -
open clusters: general - HR diagram
Description:
We have carried out CCD observations of stars in the region of the
open cluster Westerlund 1 through the V and I passbands. The direct
images were obtained with the 24-inch telescope of the University of
Toronto Southern Observatory situated at Las Campanas Observatory,
Chile. After cross-correlating all independent V, (V-I) tables we have
obtained a improved set of colour and magnitude values as compared to
those based on a single measure.
Objects:
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RA (2000) DE Designation(s)
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16 48.2 -45 50 Westerlund 1 = C 1644-457
10 23.9 -57 45 Westerlund 2 = C 1022-575
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table 59 233 Photometric data
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See also:
J/ApJS/116/263 : VI photometry of open clusters (Piatti+ 1998)
Byte-by-byte Description of file: table
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Bytes Format Units Label Explanations
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1- 3 A3 --- ID Star number
7- 12 F6.2 pix Xpos X coordinate (1)
16- 21 F6.2 pix Ypos Y coordinate (1)
25- 30 F6.3 mag Vmag V magnitude
34- 38 F5.3 mag e_Vmag ? V magnitude error
42- 46 F5.3 mag V-I V-I colour
50- 54 F5.3 mag e_V-I ? V-I colour error
58 I1 --- o_Vmag Number of measurements
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Note (1): X and Y coordinates increase toward the north and west, respectively.
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Acknowledgements: Andres Piatti
(End) Patricia Bauer [CDS] 02-Jun-1997