J/MNRAS/364/179 BVI photometry of 8 open clusters (Carraro+, 2005)
Photometry of neglected open clusters in the first and fourth Galactic
quadrants.
Carraro G., Janes K.A., Eastman J.D.
<Mon. Not. R. Astron. Soc., 364, 179-186 (2005)>
=2005MNRAS.364..179C 2005MNRAS.364..179C
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, CCD
Keywords: open clusters and associations: general -
open clusters and associations: individual:
AL 1, Berkeley 80, NGC 5764, Czernik 37
Abstract:
CCD BVI photometry is presented for eight previously unstudied star
clusters located in the first and fourth Galactic quadrants: AL 1,
BH 150, NGC 5764, Lynga 9, Czernik 37, BH 261, Berkeley 80 and
King 25. Colour-magnitude diagrams of the cluster regions suggest that
several of them (BH 150, Lynga 9, Czernik 37, BH 261 and King 25) are
so embedded in the dense stellar population toward the galactic centre
that their properties, or even their existence as physical systems,
cannot be confirmed. Lynga 9, BH 261 and King 25 appear to be slight
enhancements of dense star fields, BH 150 is probably just a single
bright star in a dense field and Czernik 37 may be a sparse, but real
cluster superimposed on the galactic bulge population. We derive
preliminary estimates of the physical parameters for the remaining
clusters. AL 1 appears to be an intermediate-age cluster beyond the
solar circle on the far side of the galaxy and the final two clusters,
NGC 5764 and Berkeley 80, are also of intermediate age but located
inside the solar ring. This set of clusters highlights the
difficulties inherent in studying the stellar populations
toward the inner regions of the galaxy.
Description:
CCD BVI observations were carried out with the CCD camera on-board the
1.0-m telescope at Cerro Tololo Interamerican Observatory (CTIO,
Chile), on the night of 2005 June 6. With a pixel size of 0.469arcsec,
and a CCD size of 512x512 pixel, this samples a 4.1x4.1arcmin2
field on the sky.
Objects:
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RA (2000) DE Designation(s) (File)
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13 15 16.0 -65 55 18 Al 1 = Cl VDBH 144 (al1.dat)
18 54 22 -01 13 00 Berkeley 80 = Cl Berkeley 80 (ber80.dat)
17 53 16 -27 22 00 Czernik 37 = Cl Czernik 37 (czern37.dat)
19 24 30 +13 42 00 King 25 = Cl King 25 (king25.dat)
16 20 41 -48 32 00 Lynga 9 = Cl Lynga 9 (lynga9.dat)
14 53 32 -52 40 12 NGC 5764 = Cl VDBH 167 (ngc5764.dat)
13 38 04.0 -63 20 45 vdbh 150 = Cl VDBH 150 (vdbh150.dat)
18 14 05.0 -28 38 00 vdbh 261 = Cl VDBH 261 (vdbh261.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
al1.dat 68 3392 Andrews-Linday 1 (VDBH 144) BVI photometry
ber80.dat 68 1738 Berkeley 80 BVI photometry
czern37.dat 68 1178 Czernik 37 BVI photometry
king25.dat 68 883 King 25 BVI photometry
lynga9.dat 68 1373 Lynga 9 BVI photometry
ngc5764.dat 68 1537 NGC 5764 BVI photometry
vdbh150.dat 68 1949 VDBH 150 BVI photometry
vdbh261.dat 68 3729 VDBH 261 BVI photometry
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Byte-by-byte Description of file: *.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- Seq Sequential number of the star, in the cluster
7- 13 F7.3 pix Xpos X position (1)
15- 21 F7.3 pix Ypos Y position (1)
23- 29 F7.4 mag Bmag ?=99.9999 Johnson B magnitude
31- 36 F6.4 mag e_Bmag ?=99.9990 rms uncertainty on Bmag
38- 44 F7.4 mag Vmag ?=99.9999 Johnson V magnitude
46- 52 F7.4 mag e_Vmag ?=99.9990 rms uncertainty on Vmag
54- 60 F7.4 mag Icmag ?=99.9999 Cousins I magnitude
62- 68 F7.4 mag e_Icmag ?=99.9990 rms uncertainty on Imag
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Note (1): North is up, east on the left.
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Acknowledgements: Copied at WEBDA, http://www.univie.ac.at/webda
(End) Patricia Vannier [CDS] 26-Jan-2006