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J/A+A/428/67  UBVRI mag of 3 Open Cluster Remnants candidates (Villanova+, 2004)

NGC 5385, NGC 2664 and Collinder 21: three candidate Open Cluster Remnants. Villanova S., Carraro G., de la Fuente Marcos R., Stagni R. <Astron. Astrophys. 428, 67 (2004)> =2004A&A...428...67V
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, CCD Keywords: open clusters and associations: individual: NGC 5385, NGC 2664, Collinder 21 - open clusters and associations: general - stars: binaries: close Abstract: We present CCD UBVI photometric and medium/high resolution spectroscopic observations obtained in the field of the previously unstudied dissolving open cluster candidates NGC 5385, NGC 2664 and Collinder 21. Our analysis is based on the discussion of star counts, photometry, radial velocity distribution, and proper motions available from the Tycho 2 catalogue (I/259). All three aggregates clearly emerge from the mean Galactic field, but, regrettably, the close scrutiny of proper motions and radial velocities reveals that we are not facing any physical group. Instead, what we are looking at are just chance alignments of a few bright unrelated stars. Our analysis casts some doubt on the Bica et al. (2001A&A...366..827B) criterion to look for Possible Open Cluster Remnants. It seems mandatory to define a better criterion to adopt for further investigations. Description: Observations were carried out with the AFOSC camera at the 1.82m Copernico telescope of Cima Ekar (Asiago, Italy), in in the photometric nights of December 17 and 18, 2001. Objects: -------------------------------------------------------- RA (2000) DE Designation (File) -------------------------------------------------------- 13 52 27.0 +76 10 24 NGC 5385 (table1.dat) 08 47 11.0 +12 36 06 NGC 2664 (table2.dat) 01 50 11.0 +27 04 00 Collinder 21 (table3.dat) -------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 103 43 Photometry of NGC 5385 table2.dat 103 64 Photometry of NGC 2664 table3.dat 103 52 Photometry of Collinder 21
See also: I/259 : The Tycho-2 Catalogue (Hog+ 2000) Byte-by-byte Description of file: table1.dat table2.dat table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 6- 13 F8.3 pix Xpos X coordinates (1) 16- 23 F8.3 pix Ypos Y coordinates (1) 27- 33 F7.4 mag Vmag ?=99.9999 V band magnitude 37- 43 F7.4 mag e_Vmag ?=99.9999 error in Vmag 47- 53 F7.4 mag B-V ?=99.9999 (B-V) color index 57- 63 F7.4 mag e_B-V ?=99.9999 error in (B-V) 67- 73 F7.4 mag U-B ?=99.9999 (U-B) color index 77- 83 F7.4 mag e_U-B ?=99.9999 error in (U-B) 87- 93 F7.4 mag V-I ?=99.9999 (V-I) color index 97-103 F7.4 mag e_V-I ?=99.9999 error in (V-I)
Note (1): The center is in (500.0,500.0) pixel. The scale is 0.473"/pix. East is toward negative X, South toward negative Y.
Acknowledgements: Giovanni Carraro
(End) Patricia Vannier [CDS] 03-Sep-2004
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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