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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 (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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 56 2134 BV photometry table7.dat 48 2387 Proper motions
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-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
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
Note (1): 1 pix = 0.8".
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
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
Acknowledgements: Joerg Sanner
(End) Patricia Bauer [CDS] 30-Sep-1999
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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