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J/AZh/80/291           Proper motions of open clusters       (Kharchenko+, 2003)

Subsystem of open clusters in the post-Hipparcos era: cluster structural parameters and proper motions. Kharchenko N.V., Pakulyak L.K., Piskunov A.E. <Astron. Zh. 80, 291 (2003)> =2003AZh....80..291K =2003ARep...47..263K
ADC_Keywords: Clusters, open ; Combined data Abstract: The wide neighborhoods of 401 open clusters are analysed using the the modern, high precision, homogeneous all sky ASCC-2.5 all-sky catalogue (Kharchenko, 2001, Cat. I/280). More than 28000 possible members (including about 12500 most probable ones) are identified using kinematic and photometric criteria. Star counts with the ASCC-2.5 and USNO-A2.0 (Cat. I/252) catalogs are used to determine the angular and linear radii of cluster cores and coronae, which exceed the previous published values by factors of two or three. The mean proper motions are determined directly in the Hipparcos system for 401 open clusters, for 183 of them for the first time. The heliocentric distances of 118 clusters are determined for the first time based on color-magnitude diagrams for the identified members. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 107 401 Catalog
See also: I/252 : The USNO-A2.0 Catalogue (Monet+, 1998) I/280 : All-sky Compiled Catalogue of 2.5 million stars (Kharchenko, 2001) Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
1- 9 A9 -- IAU IAU number, based on B1950 position (1) 11- 24 A14 -- Name Traditional name and/or number 26- 31 F6.3 h RAhr Right Ascension J2000.0 (2) 33- 38 F6.2 deg DEdeg Declination J2000.0 (2) 40- 43 F4.2 deg r1(ASCC) Core radius from ASCC-2.5 45- 48 F4.2 deg r2(ASCC) Corona radius from ASCC-2.5 50- 53 F4.2 deg r1(USNO) ? Core radius from USNO-A2.0 55- 58 F4.2 deg r2(USNO) ? Corona radius from USNO-A2.0 60- 63 F4.1 mag Bc ? Completing B-magnitude in USNO-A2.0 65- 67 I3 -- N(P>61) Number of the most probable members, Pmemb ≥ 61% 69- 71 I3 -- Npm Number of stars for cluster proper motion 73- 78 F6.2 mas/yr pmRA Proper motion of cluster in RA*cos(DE) 80- 83 F4.2 mas/yr e_pmRA Standard error in pmRA 85- 90 F6.2 mas/yr pmDE Proper motion of cluster in DE 92- 95 F4.2 mas/yr e_pmDE Standard error in pmDE 97-100 I4 pc Dist Distance of cluster 102-105 F4.2 mag E(B-V) ? Colour-excess 107 I1 -- Ref Flag of Dist and E(B-V) source (3)
Note (1): IAU: Cluster notation according to the system accepted by the International Astronomical Union in Montreal 1979 Note (2): RAh, DEdeg are corrected in accordance with maximum member spatial density Note (3): This flag has the following meaning: 1: Loktin et al. (1994, Cat. V/96), Loktin et al. (2001a, Astron. Astrophys. Trans. 20, 607, 2001b, Private communication) 2: Robichon et al. (1999, Cat. J/A+A/345/471) 3: Lynga (1987, see Cat. VII/229) 4: Mermilliod (1995, WEBDA, The DataBase for Stars in Open Clusters, http://obswww.unige.ch/webda) 5: Kharchenko et al., this paper

(End) Nina Kharchenko (MAO), Veta Avedisova (INASAN) 02-Jun-2003
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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