J/A+A/373/153 CCD Δa-photometry of 5 open clusters (Paunzen+, 2001)
CCD photometric search for peculiar stars in open clusters.
II. NGC 2489, NGC 2567, NGC 2658, NGC 5281 and NGC 6208
Paunzen E., Maitzen H.M.
<Astron. Astrophys. 373, 153 (2001)>
=2001A&A...373..153P 2001A&A...373..153P
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, narrow-band
Keywords: stars: chemically peculiar - stars: early-type -
techniques: photometric - open clusters and associations: general
Description:
High accurate photometric data in the three filter, narrow band Delta
a-system for five open clusters (NGC 2489, NGC 2567, NGC 2658,
NGC 5281 and NGC 6208) are presented permitting one to detect apparent
chemically peculiar stars. The ages and distances are wide spread to
improve the statistics of peculiar stars in our Milky Way. A total of
235 stars within these clusters have been observed. We have detected
ten apparent peculiar objects (six with significant positive and four
with negative Δa-values) in four open clusters. Although three of
them within the boundaries of NGC 2567 are probably not members of
this cluster. Since no Stromgren uvbybeta data are available from the
literature, Johnson UB-Vphotometry was used to test and calibrate our
photometric data. The results from a comparison of both systems are
excellent. The tables presented here include all photometric
observations of these five clusters.
For a description of the Δa photometric system, see e.g.
GCPD/75
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------------
07 56 12 -30 04 NGC 2489
08 18 27.1 -30 38 52 NGC 2567
08 43 24 -32 39 NGC 2658
13 46 36 -62 54 NGC 5281
16 49 30 -53 49 NGC 6208
----------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 75 59 Observed program stars of NGC 2489
table5.dat 75 50 Observed program stars of NGC 2567
table6.dat 73 55 Observed program stars of NGC 2658
table7.dat 72 30 Observed program stars of NGC 5281
table8.dat 73 41 Observed program stars of NGC 6208
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See also:
J/A+A/371/L5 : CCD Δa-photometry of NGC 1866 (Maitzen+, 2001)
J/A+A/385/867 : NGC 2439, 3960, 6134, 6192 and 6451 (Paunzen+, 2002)
J/A+A/395/823 : Collinder 272, Pismis 20, Lynga 14, NGC 6396 and 6611
(Paunzen+, 2002)
J/A+A/412/721 : NGC 2099, 3114, 6204, 6705 and 6756 (Paunzen+, 2003)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- No1 Notation for stars sorted after X and Y
4- 5 I2 --- LJ ? Notation according to Lindoff & Johansson
(1968ArA.....5...45L 1968ArA.....5...45L, NGC 2489 NNN)
7- 8 I2 --- RP ? Notation according to Ramsay & Pollaco (1992,
Cat. J/A+AS/94/73, Cl* NGC 2489 RP NNN)
11- 15 F5.1 pix Xpix X-coordinate
18- 22 F5.1 pix Ypix Y-coordinate
25- 29 F5.2 mag Vmag Mean V value
32- 36 F5.3 mag a Mean a index
38- 42 F5.3 mag e_a rms uncertainty on a
44- 49 F6.3 mag g1-y Mean (g1-y) index
51- 55 F5.3 mag e_g1-y rms uncertainty on (g1-y)
57- 62 F6.3 mag da(g1-y) Deviation from cluster line (Δa)
65- 68 F4.2 mag B-V ? (B-V) from the literature
70- 75 F6.3 mag da(B-V) ? Deviation from cluster line (Δa)
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- No1 Notation for stars sorted after X and Y
4- 5 I2 --- L ? Notation according to Lindoff
(1968ArA.....4..587L 1968ArA.....4..587L)
7- 9 I3 --- RP ? Notation according to Ramsay & Pollaco (1992
Cat. J/A+AS/94/73, Cl* NGC 2567 RP NNN)
12- 16 F5.1 pix Xpix X-coordinate
19- 23 F5.1 pix Ypix Y-coordinate
26- 30 F5.2 mag Vmag Mean V value
33- 37 F5.3 mag a Mean a index
39- 43 F5.3 mag e_a rms uncertainty on a
45- 50 F6.3 mag g1-y Mean (g1-y) index
52- 56 F5.3 mag e_g1-y rms uncertainty on (g1-y)
58- 63 F6.3 mag da(g1-y) Deviation from cluster line (Δa)
65- 68 F4.2 mag B-V ? (B-V) from the literature
70- 75 F6.3 mag da(B-V) ? Deviation from cluster line (Δa)
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Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- No1 Notation for stars sorted after X and Y
4- 6 I3 --- RP ? Notation according to Ramsay & Pollaco (1992
Cat. J/A+AS/94/73, Cl* NGC 2658 RP NNN))
9- 13 F5.1 pix Xpix X-coordinate
16- 20 F5.1 pix Ypix Y-coordinate
23- 27 F5.2 mag Vmag Mean V value
30- 34 F5.3 mag a Mean a index
36- 40 F5.3 mag e_a rms uncertainty on a
42- 47 F6.3 mag g1-y Mean (g1-y) index
49- 53 F5.3 mag e_g1-y rms uncertainty on (g1-y)
55- 60 F6.3 mag da(g1-y) Deviation from cluster line (Δa)
63- 66 F4.2 mag B-V ? (B-V) from the literature
68- 73 F6.3 mag da(B-V) ? Deviation from cluster line (Δa)
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Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- No1 Notation for stars sorted after X and Y
4- 5 I2 --- MV ? Notation according to Moffat & Vogt
(1973A&AS...10..135M 1973A&AS...10..135M, Cl NGC 5281 NN)
8- 12 F5.1 pix Xpix X-coordinate
15- 19 F5.1 pix Ypix Y-coordinate
22- 26 F5.2 mag Vmag Mean V value
29- 33 F5.3 mag a Mean a index
35- 39 F5.3 mag e_a rms uncertainty on a
41- 46 F6.3 mag g1-y Mean (g1-y) index
48- 52 F5.3 mag e_g1-y rms uncertainty on (g1-y)
54- 59 F6.3 mag da(g1-y) Deviation from cluster line (Δa)
62- 65 F4.2 mag B-V ? (B-V) from the literature
67- 72 F6.3 mag da(B-V) ? Deviation from cluster line (Δa)
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- No1 Notation for stars sorted after X and Y
4- 6 I3 --- L ? Notation according to Lindoff
(1972A&AS....7..231L 1972A&AS....7..231L, NGC 6208 NNNa)
9- 13 F5.1 pix Xpix X-coordinate
16- 20 F5.1 pix Ypix Y-coordinate
23- 27 F5.2 mag Vmag Mean V value
30- 34 F5.3 mag a Mean a index
36- 40 F5.3 mag e_a rms uncertainty on a
42- 47 F6.3 mag g1-y Mean (g1-y) index
49- 53 F5.3 mag e_g1-y rms uncertainty on (g1-y)
55- 60 F6.3 mag da(g1-y) Deviation from cluster line (Δa)
63- 66 F4.2 mag B-V ? (B-V) from the literature
68- 73 F6.3 mag da(B-V) ? Deviation from cluster line (Δa)
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Acknowledgements: Ernst Paunzen
History:
Table5.dat was modified by the authors on 27-Aug-2001.
References:
Bayer et al., Paper I 2000A&AS..147...99B 2000A&AS..147...99B
Paunzen & Maitzen, Paper III 2002A&A...385..867P 2002A&A...385..867P, Cat. J/A+A/385/867
Paunzen et al., Paper IV 2002A&A...395..823P 2002A&A...395..823P, Cat. J/A+A/395/823
(End) E. Paunzen [IfA, Vienna] , Patricia Bauer [CDS] 27-Aug-2001