J/A+AS/100/243 Proper motions in M 67 (Zhao+ 1993) ================================================================================ Study of proper motions in the region of the open cluster M67 and membership of stars Zhao J.L., Tian K.P., Pan R.S., He Y.P., Shi H.M. =1993A&AS..100..243Z (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Clusters, open ; Proper motions Keywords: open cluster, proper motion, membership Abstract: Relative proper motions and membership probabilities of 1046 stars in the open cluster M67 are are determined from PDS measurements of 9 plate pairs taken with the double astrograph at the Zo-Se station Shanghai Observatory, which has an aperture of 40cm, a focal length of 6.9m and a scale of 30"/mm. The number of stars with membership probabilities higher than 0.8 and at a distance less than 45' from the field center is 282. The average standard errors of proper motions vary from +/-0.0004"/yr for bright stars in the inner part of the field to some +/-0.0015"/yr for faint stars in the outer part of the cluster. It is shown by a detailed discussion that the proper motions and membership probabilities of the stars determined in this paper are in quite satisfactory agreement wit those obtained by Sanders (1977A&AS...27...89S) or Girard et al. (1989AJ.....98..227G). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 08 50.4 +11 49 M 67 = NGC 2682 ---------------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table6 67 1046 The catalogue of proper motions and membership probabilities in M 67 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table6 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- No Sequential number (1) 5 A1 --- n_No [*] Unexplained note 6- 9 I4 --- Sanders ? Sanders (1977A&AS...27...89S) identification number 11- 17 F7.3 cm Xpos X position (2) 19- 24 F6.3 cm Ypos Y position (2) 26- 30 F5.2 mag Bmag B magnitude (3) 32- 36 F5.2 mag Vmag ? V magnitude (3) 38- 42 F5.2 arcsec/yr pmX Proper motion along X direction 44- 48 F5.2 arcsec/yr pmY Proper motion along Y direction 50- 53 F4.2 arcsec/yr e_pmX rms uncertainty on pmX 55- 58 F4.2 arcsec/yr e_pmY rms uncertainty on pmY 60- 61 I2 % P1 Membership probability, this study 63- 64 I2 % P2 ? Membership probability, Sanders' catalogue (1977A&AS...27...89S) 67 I1 --- N Number of measured plate pairs -------------------------------------------------------------------------------- Note (1): Stars 894 and 1024 are BD +12 1926 and BD +12 1927, respectively Note (2): Coordinates from PDS measurements on plate 340 Note (3): Magnitudes from Sanders (1977A&AS...27...89S) or calculated on the basis of their PDS magnitudes for stars with no magnitude data available in the Sanders' catalogue -------------------------------------------------------------------------------- History: Prepared via OCR at CDS. ================================================================================ (End) James Marcout, Patricia Bauer [CDS] 20-Mar-1997