II/117 Catalog of UBVRI Photometry of Globular Clusters (Peterson 1986)
A Catalog of Concentric Aperture UBVRI Photoelectric Photometry
of Globular Clusters
Peterson C. J.
<Publ. Astron. Soc. Pac., 98, 192 (1986)>
=1986PASP...98..192P 1986PASP...98..192P
ADC_Keywords: Photometry, UBVRI ; Clusters, globular
Description:
Photometric data directly obtained in UBVRI or converted to UBVRI
magnitudes are tabulated. The data comprise approximately 4600 records
from 56 individuals and contains data unpublished at the time of the
compilation as well as published data.
Introduction:
This catalog of globular cluster magnitudes includes both measurements
originally obtained on that system and those obtained in other systems
which have been converted to the UBVRI system. The equations used for
this conversion are given in the source reference. No attempt has been
made to put all observations on the same system otherwise. Although
both northern and southern UBV data match the original Johnson system,
the R and I photometry may differ due to differences in photocells and
filters used in defining various sets of standard stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
data.dat 79 4256 Data (tables 1-7)
refs.dat 132 50 References (table 8)
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Byte-by-byte Description of file: data.dat
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Bytes Format Units Label Explanations
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1-13 A13 --- name Cluster Name
15-18 A4 --- Ref *Reference Code
20-25 F6.3 arcmin ap ? Aperture Diameter
27-31 F5.2 mag Umag *? U Magnitude
33-37 F5.2 mag U-B ? Johnson Ultraviolet Color Index
39-43 F5.2 mag Bmag ? B Magnitude, computed from V+(B-V)
45-49 F5.2 mag B-V ? Johnson Blue Color Index
51-55 F5.2 mag Vmag ? V Magnitude
57-61 F5.2 mag V-R ? Visual-Red Color Index
63-67 F5.2 mag Rmag ? R Magnitude, computed from V-(V-R)
69-73 F5.2 mag V-I *? Visual-I Band Color Index
75-79 F5.2 mag Imag ? I Magnitude, computed from V-(V-I)
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Note on Ref:
Literature reference for data entry, following the code of refs.dat
Note on Umag:
Computed from V+(B-V)+(U-B) if all data exist for given aperture;
otherwise the column is left blank
Note on V-I:
Generally computed from (V-R)+(R-I) in the original sources of data
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1-4 A4 --- Ref Reference Code
6-105 A100 --- Text Text of reference
117-119 I3 --- N Number of Clusters
121-132 A12 --- Type Type of Data
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References:
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de Vaucouleurs G., de Vaucouleurs A., and Corwin H.G.Jr. 1975, Second
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Gordon K.C., and Kron G.E. =1983PASP...95..461G 1983PASP...95..461G
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Thuan T.X., and Gunn J.E. =1976PASP...88..543T 1976PASP...88..543T
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(End) Julie Anne Watko [SSDOO/ADC] 21-Feb-1996