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J/PAZh/36/354       NGC 6866 proper motions and CCD photometry (Frolov+, 2010)

Proper motions and CCD photometry of stars in the region of the open cluster NGC 6866. Frolov V.N., Ananjevskaja Yu.K., Gorshanov D.L., Polyakov E.V. <Pis'ma Astron. Zh. 36, 354 (2010)> =2010PAZh...36..354F =2010AstL...36..338F
ADC_Keywords: Clusters, open ; Proper motions ; Photometry, CCD Keywords: open star clusters: NGC 6866 - photometry - proper motions Abstract: We present the results of our comprehensive study of the Galactic open star cluster NGC 6866. The positions of stars in the investigated region have been obtained with the "Fantasy "automatic measuring machine from 10 plates of the normal astrograph at the Pulkovo Astronomical Observatory. The size of the investigated field is 40x40arcmin2, the limiting magnitude is B≤16.6mag, and the maximum epoch difference is 79yr. For 1202 field stars we have determined the relative proper motions with a rms error of 0.5mas/yr. Out of them 413 stars may be considered cluster members with a probability P>70% according to the astrometric criterion. Photometric diagrams have been used as an additional criterion. We have performed two-color BV CCD photometry of stars with the Pulkovo ZA-320M mirror astrograph. The U magnitudes from the literature have also been used to construct the two-color diagrams. A total of 267 stars have turned out to be members of NGC 6866 according to the two criteria. We present refined physical parameters of the cluster and its age estimate (5.6x108yr). The cluster membership of red and blue giants, variable, double, and multiple stars is considered. We have found an almost complete coincidence of the positions of one of the stars in the region (a cluster nonmember) and a soft X-ray source in the ROSAT catalog. The "Fantasy " automatic measuring machine is described in the Appendix. DOI:10.1134/S106377371005004X Description: Table 2 (The astrometrical results) and Table 3 (Photometric data) from the paper. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 20 03 55 +44 09 30 NGC 6866 = Cl Melotte 229 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 83 1202 Stars proper motions and estimations of their cluster membership table3.dat 98 1202 Photometric data of stars in the NGC 6866 area
See also: I/295 : Absolute Proper motions of 59766 stars (Bobylev+, 2004) I/252 : The USNO-A2.0 Catalogue (Monet+ 1998) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Sequential number 6- 18 A13 --- USNO-A2.0 Star number in USNO-A 2.0, Cat. I/252 20- 25 F6.2 arcmin Xpos Rectangular coordinate X of star (G1) 27- 32 F6.2 arcmin Ypos Rectangular coordinate Y of star (G1) 33- 38 F6.1 mas/yr pmX Relative proper motion along X (RA) 39- 42 F4.1 mas/yr e_pmX pmX standard error 43- 48 F6.1 mas/yr pmY Relative proper motion along Y (DE) 49- 52 F4.1 mas/yr e_pmY pmY standard error 53- 55 I3 --- Pl Number of plates 56- 58 I3 % Mm Membership probability 60- 61 A2 --- bl "bl" marks blends 63- 83 A21 --- ONames Names in BD, HD, IRAS, Tycho or ROSAT catalogs
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Sequential number 6- 11 F6.2 arcmin Xpos Rectangular coordinate X of a star relative to the star N 649 (G1) 13- 18 F6.2 arcmin Ypos Rectangular coordinate Y of a star relative to the star N 649 (G1) 20- 24 F5.2 mag Bmag ? CCD photometry in the B band 26- 30 F5.2 mag Vmag ? CCD photometry in the V band 32- 36 A5 --- BZ ? Star number according to (BZ) (1) 38- 42 F5.2 mag Bmag1 ? Photographic (BZ) B magnitude (1) 43 A1 --- n_Bmag1 [:] marks blends 45- 49 F5.2 mag Vmag1 ? Photoelectric (BZ) V magnitude (1) 50 A1 --- n_Vmag1 [:] marks blends 52- 56 F5.2 mag Bmag2 ? Photographic (SH) B magnitude (1) 58- 62 F5.2 mag Vmag2 ? Photographic (SH) V magnitude (1) 64- 68 F5.2 mag Umag2 ? Photographic (SH) U magnitude (1) 70- 74 F5.2 mag Bmag3 ? Photoelectric or photographic (WC) B magnitude (1) 75 A1 --- n_Bmag3 [:] marks blends 77- 81 F5.2 mag Vmag3 ? Photoelectric or photographic (WC) V magnitude (1) 82 A1 --- n_Vmag3 [:] marks blends 83- 87 F5.2 mag Umag3 ? Photoelectric or photographic (WC) U magnitude (1) 88 A1 --- n_Umag3 [:] marks blends 93- 98 A6 --- Notes Notes (bl marks blends)
Note (1): References: BZ = Barkhatova, K.A., and Zakharova, P.E., 1970, Ural. Sb. 93, vipusk 6, 3, In Russian SH = Sutantio, W. and Hidajat, B.: 1972, IBSH, 19, 31S WC = Hoag, A.A., Johnson, H.L., Iriarte, B., et al.: 1961PUSNO..17..343H (NGC 6866 NN)
Global notes: Note (G1): Position relative to the star (X along RA, Y along DE) N 649 = USNO-A2.0 1275-13248250 (20:03:57.366+44:09:33.89) (J2000)
Acknowledgements: V.N. Frolov, History: * 20-May-2010 : Original tables * 26-Apr-2011 : In table2, for No 748, cross-identification to HD 190465 suppressed.
(End) Patricia Vannier [CDS] 20-May-2010
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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