J/A+A/361/945 UBV photometry in open cluster NGC 2539 (Lapasset+, 2000)
UBV photometric study and basic parameters of the southern open cluster NGC 2539
Lapasset E., Claria J.J., Mermilliod J.-C.
<Astron. Astrophys. 361, 945 (2000)>
=2000A&A...361..945L 2000A&A...361..945L
ADC_Keywords: Clusters, open - Photometry, UBV
Keywords: Galaxy: open clusters and associations: general -
Galaxy: open clusters and associations: individual: NGC 2539 -
stars: Hertzsprung-Russel (HR) and C-M diagrams -
methods: observational
Abstract:
We present UBV photoelectric observations of 345 stars in the field of
the southern open cluster NGC 2539. The analysis of these data allows
to determine that 169 stars are probable members of the cluster main
sequence, while 23 are possible members.
Description:
The UBV measurements were carried out during an observing run with the
1.0m telecope of the European Southern Observatory (ESO) at La Silla,
and several runs with the 0.60m Canadian telescsope of the David
Dunlap Obvservatory located in Las Campanas Observatory.
Objects:
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RA (2000) DE Designation(s)
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08 10 42 -12 50.0 NGC 2539
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 57 352 UBV photoelectric data
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See also:
http://obswww.unige.ch/webda/cgi-bin/ocl_page.cgi?cluster=ngc2539 : the
WEBDA page for the open cluster NGC 2539
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID [101/675] Star number
9-11 I3 --- BDA [1/318]? Star number in the WEBDA database
16-19 I4 pix Xpos ? Rectangular position (1)
25-27 I3 pix Ypos ? Rectangular position (1)
33-38 F6.3 mag Vmag [9.0/15.7]V magnitude
40-45 F6.3 mag B-V B-V colour index
48-53 F6.3 mag U-B ? U-B colour index
57-57 I1 --- o_Vmag [1/5] Number of measurements
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Note (1): (X,Y)=(0,0) is equivalent to RA=08 07 15, DE=-12 56,2 (1950).
The X coordinate increases towards the east, while the Y coordinate
increases towards the north.
DeltaX = 1 is equivalent to Delta(R.A.)= 0.11672 seconds (of time)
DeltaY = 1 is equivalent to 0.0284 arcmin.
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Acknowledgements: Jean-Claude Mermilliod
(End) Patricia Bauer [CDS] 12-Sep-2000