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J/A+A/388/168       Absolute proper motions of 93 open clusters   (Dias+, 2002)

Proper motions of open clusters based on the TYCHO2 Catalogue. II. Clusters farther than 1 kpc. Dias W.S., Lepine J.R.D., Alessi B.S. <Astron. Astrophys. 388, 168 (2002)> =2002A&A...388..168D
ADC_Keywords: Clusters, open ; Proper motions Keywords: Galaxy: open clusters and association: general Abstract: We determined the mean absolute proper motion of 93 open clusters situated farther than 1 kpc from the Sun. The results are derived from the stellar proper motion data given in the Tycho2 Catalogue (I/259). The mean proper motion of the clusters and membership probability of individual stars were obtained from the proper motion data by applying the statistical method proposed by Sanders (1971A&A....14..226S). The measurements made use of a large number of stars, usually several tens, for each cluster. The total number of stars investigated in the fields of the clusters is 4864 of which 2021 were considered members. For 55 clusters, this is the first determination of the proper motion. The distances, ages and kinematics parameters of the clusters can be accessed at File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 80 93 List the parameters provided by the method of Sanders for 93 open clusters notes.dat 80 42 Individual notes pm/* 147 93 Proper motions and membership, by cluster
See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) I/259 : The Tycho-2 Catalogue (Hog+ 2000) I/215 : Tables of membership for 43 open clusters (Zhao+, 1995) II/124 : UBV and MK types in Open Clusters, 3rd ed. (Mermilliod 1986) IV/17 : HD,HDE,DM Identifications in Open Clusters (Mermilliod 1986) V/19 : Masses and Ages of Stars in 68 Open Clusters (Piskunov 1980) VII/92 : Open Cluster Data 5th Edition (Lynga 1987) J/A+A/345/471 : Memberships of open clusters (Robichon+, 1999) J/A+A/376/441 : Absolute proper motions of 112 open clusters (Dias+, 2001) : Open clusters and galactic structure Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Cluster Name of the cluster 9 A1 --- f_Cluster [*] Note detailed in notes.dat file 11- 12 I2 --- Nmemb Estimated number of members in the cluster 14- 18 F5.2 mas/yr pmRACl Mean proper motion of the cluster in mu_alpha.cos(Dec), ICRS 20- 25 F6.2 mas/yr pmDECl Mean proper motion of the cluster in mu_delta, ICRS 27- 30 F4.2 mas/yr e_pmRACl Standard deviation in pmRA and pmDE 32- 34 I3 --- Nfield Estimated number of field stars 36- 41 F6.2 mas/yr pmRAS Mean proper motion of the field stars in mu_alpha.cos(Dec), ICRS 43- 47 F5.2 mas/yr e_pmRAS Standard deviation of the mean proper motion of the field stars in mu_alpha.cos(Dec), ICRS 49- 54 F6.2 mas/yr pmDES Mean proper motion of the field stars in mu_delta, ICRS 56- 60 F5.2 mas/yr e_pmDES Standard deviation of the mean proper motion of the field stars in mu_delta, ICRS 62- 68 F7.3 deg theta Rotation angle to the major axis 70- 80 A11 --- FileName Name of the file containing the complete data, in "pm" subdirectory
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Cluster Cluster name 10- 80 A71 --- Note Text of the note
Byte-by-byte Description of file: pm/*
Bytes Format Units Label Explanations
1- 10 I10 mas RAmas Right ascension (2000.0) from Tycho2, I/259 12- 21 I10 mas DEmas Declination (2000.0) from Tycho2, I/259 25- 29 F5.2 mag VTmag Magnitude of the star from Tycho2, I/259 33- 35 I3 mas e_RAmas Standard deviation in RA 39- 41 I3 mas e_DEmas Standard deviation in DE 43- 50 F8.3 yr EpRA,DE Mean epoch of observation from Tycho2, I/259 54- 60 F7.2 mas/yr pmRA Proper motion in mu_alpha.cos(Dec), ICRS 63- 69 F7.2 mas/yr pmDE Proper motion in mu_delta, ICRS 71- 76 F6.2 mas/yr e_pmRA Standard deviation of the mu_alpha.cos(Dec), ICRS 79- 84 F6.2 mas/yr e_pmDE Standard deviation of the mu_delta, ICRS 90- 91 I2 h RAh Right Ascension J2000 (hours), at EpRA,DE 93- 94 I2 min RAm Right Ascension J2000 (minutes) 96-101 F6.3 s RAs Right Ascension J2000 (seconds) 104 A1 --- DE- Declination J2000 (sign) 105-106 I2 deg DEd Declination J2000 (degrees), at EpDE,DE 109-110 I2 arcmin DEm Declination J2000 (minutes) 113-117 F5.2 arcsec DEs Declination J2000 (seconds) 121-132 A12 --- TYC Tycho2 identifier, I/259 135-140 I6 --- HIP Hipparcos identifier, I/239 141 A1 --- m_HIP Multiplicity index on HIP 144-146 I3 % Memb Membership probability 147 A1 --- --- [%]
Acknowledgements: Wilton S Dias or
(End) Patricia Bauer [CDS] 13-Jun-2002
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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