J/A+A/403/937 Stroemgren photometry of NGC 6192 and NGC 6451 (Paunzen+, 2003)
Stroemgren uvby photometry of the open clusters NGC 6192 and NGC 6451.
Paunzen E., Maitzen H.M., Rakos K.D., Schombert J.
<Astron. Astrophys. 403, 937 (2003)>
=2003A&A...403..937P 2003A&A...403..937P
ADC_Keywords: Clusters, open ; Photometry, uvby
Keywords: stars: chemically peculiar - stars: early-type -
techniques: photometric - open clusters and associations: general
Abstract:
We have investigated the two open clusters NGC 6192 and NGC 6451 for
which widely different reddening values and thus ages and distances
via Stroemgren uvby photometry can be found in the literature. Our
measurements allow us to disentangle the apparent discrepancies in the
literature and to derive new accurate values. From appropriate
calibrations we find that the overall abundance for NGC 6192 is about
solar whereas a subsolar value for NGC 6451 was estimated. From two
previous reported photometrically candidate CP stars, one within NGC
6192 shows Stroemgren indices typical for a B8Si star whereas the
other object of NGC 6451 is most probably a foreground G-type star.
Description:
The presented two tables summarize all photometric measurements within
the Stroemgren uvby system as well as values from the literature in
the Johnson UBV system for NGC 6192 and NGC 6451.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 84 374 Observed program stars of NGC 6192
stars.dat 59 81 NGC 6192 star positions (from Simbad),
for stars with WEBDA number
table4.dat 85 912 Observed program stars of NGC 6451
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See also:
J/ApJS/116/263 : VI photometry of open clusters (Piatti+, 1998)
J/A+A/385/867 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2002)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- PMR Sequential number, in NGC 6192,
Cl* NGC 6192 PMR NNN in Simbad
6- 7 I2 h RAh Right ascension (J2000.0)
9- 10 I2 min RAm Right ascension (J2000.0)
12- 15 F4.1 s RAs Right ascension (J2000.0)
17 A1 --- DE- Declination sign (J2000.0)
18- 19 I2 deg DEd Declination (J2000.0)
21- 22 I2 arcmin DEm Declination (J2000.0)
24- 25 I2 arcsec DEs Declination (J2000.0)
29- 47 A19 ---- SName Simbad name from Paunzen et al., 2002,
Cat. J/A+A/385/867
49 A1 --- --- [=]
51- 59 A9 --- HD HD name
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- PMR Notation for stars sorted after X and Y (1)
5- 7 I3 --- WEBDA ? Notation according to WEBDA (2)
9- 14 F6.1 pix Xpos X-coordinate (3)
16- 21 F6.1 pix Ypos Y-coordinate (3)
23- 27 F5.3 mag b-y Mean Stroemgren (b-y) value
29- 33 F5.3 mag e_b-y Sigma (b-y)
35- 40 F6.3 mag m1 Mean Stroemgren m1 value
42- 46 F5.3 mag e_m1 Sigma m1
48- 53 F6.3 mag c1 Mean Stroemgren c1 value
55- 59 F5.3 mag e_c1 Sigma c1
61- 66 F6.3 mag Vmag Mean V value
68- 72 F5.3 mag e_Vmag Sigma Vmag
74- 78 F5.3 mag B-V ? (B-V) from the literature
80- 85 F6.3 mag U-B ? (U-B) from the literature
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Note (1): Simbad designations:
table3.dat: Cl* NGC 6192 PMR NNN
table4.dat: Cl* NGC 6451 PMR NNN
Note (2): WEBDA naming conventions:
For NGC 6192, number from Kilambi et al. (1983BASI...11..226K 1983BASI...11..226K),
Cl* NGC 6192 KF NNN in Simbad
For NGC 6451, numbers from Piatti (1998, Cat. J/ApJS/116/263),
Cl* NGC 6451 PCB NNN in Simbad
Note (3): 1pix=0.43". North is to the left and west is upwards
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Acknowledgements: Ernst Paunzen
(End) E. Paunzen (IfA, Vienna) 28-May-2003