J/A+A/349/448 Open star clusters. I. NGC 581 (M 103) (Sanner+, 1999)
Photometric and kinematic studies of open star clusters. I. NGC 581 (M 103).
Sanner J., Geffert M., Brunzendorf J., Schmoll J.
<Astron. Astrophys. 349, 448 (1999)>
=1999A&A...349..448S 1999A&A...349..448S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, UBV ;
Proper motions
Keywords: Galaxy: open clusters and associations: individual: NGC 581 (M 103) -
astrometry - stars: kinematics -
stars: Hertzsprung-Russel (HR) and C-M diagrams -
stars: luminosity function, mass function
Abstract:
We present CCD photometry and a proper motion study of the young open
star cluster, NGC 581 (M 103). Fitting isochrones to the colour
magnitude diagram, we found an age of 16±4Myr and a distance of
roughly 3kpc for this cluster. The proper motion study identifies 77
stars of V=14.5mag or brighter to be cluster members. We combine
membership determination by proper motions and statistical field star
subtraction to derive the IMF of the cluster and find a quite steep
slope of Γ=-1.80.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 56 2134 BV photometry
table7.dat 48 2387 Proper motions
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/A+A/357/471 : Open star clusters. II. NGC 1960 + NGC 2194 (Sanner+, 2000)
J/A+A/369/511 : Open star clusters. III. NGC 4103, 5281, 4755 (Sanner+, 2001)
Byte-per-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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2- 7 I6 --- Seq Star number
10- 17 F8.3 pix xpos X position on CCD (1)
20- 27 F8.3 pix ypos Y position on CCD (1)
29- 34 F6.3 mag B-V B-V colour
37- 42 F6.3 mag Vmag V magnitude
45- 49 F5.3 mag e_Bmag Photometric error in B
52- 56 F5.3 mag e_Vmag Photometric error in V
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Note (1): 1 pix = 0.8".
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Byte-per-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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2- 7 I6 --- Seq Star number
9- 10 I2 h RAh Right ascension (J2000.0)
12- 13 I2 min RAm Right ascension (J2000.0)
15- 20 F6.3 s RAs Right ascension (J2000.0)
22 A1 --- DE- Declination sign (J2000.0)
23- 24 I2 deg DEd Declination (J2000.0)
26- 27 I2 arcmin DEm Declination (J2000.0)
29- 33 F5.2 arcsec DEs Declination (J2000.0)
35- 40 F6.2 mas/yr pmRA Proper motion in RA (mu_alpha cos delta)
42- 48 F7.2 mas/yr pmDE Proper motion in DE
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Acknowledgements: Joerg Sanner
(End) Patricia Bauer [CDS] 30-Sep-1999