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J/ApJ/608/243       CCD BVI photometry of M12 stars          (Hargis+, 2004)

The luminosity function and color-magnitude diagram of the globular cluster M12. Hargis J.R., Sandquist E.L., Bolte M. <Astrophys. J., 608, 243-260 (2004)> =2004ApJ...608..243H
ADC_Keywords: Clusters, globular ; Photometry, CCD ; Photometry, UBVRI Keywords: diffusion - globular clusters: individual (M12) - stars: evolution - stars: luminosity function, mass function Description: The observations were done on the nights of UT dates 1995 May 6 and 9 by using the Kitt Peak National Observatory (KPNO) 0.9 m telescope. The file contains BVI data of the globular cluster M12. All frames were taken using a 2048x2048 pixel CCD with pixels covering 0.68 arcseconds on a side, for a total field of approximately 23.2 arcminutes on a side. The data were calibrated against Stetson (2000PASP..112..925S) standard stars. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 16 47 14.5 -01 56 52 M 12 = NGC 6218 = C 1644-018 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file photom.dat 86 17301 BVI Photometry for M12 stars
Byte-by-byte Description of file: photom.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Sequential number 7- 14 F8.3 pix Xpos X coordinate in pixels (1) 16- 23 F8.3 pix Ypos Y coordinate in pixels (1) 26- 32 F7.4 mag Bmag ?=0.0 Johnson B magnitude 35- 41 F7.4 mag e_Bmag ?=0.0 Johnson B magnitude error 44- 50 F7.4 mag Vmag ?=0.0 Johnson V magnitude 53- 59 F7.4 mag e_Vmag ?=0.0 Johnson V magnitude error 62- 68 F7.4 mag Icmag ?=0.0 Cousins I magnitude 71- 77 F7.4 mag e_Icmag ?=0.0 Cousins I magnitude error 80- 86 F7.4 --- Chi Reduced chi2
Note (1): 1 pix = 0.68"
Acknowledgements: Eric Sandquist <erics'> History: * 19-Aug-2004: the file with the photometric results has been replaced by a new one, since the original file contained uncalibrated instrumental magnitudes. Only stars having measurements in at least 2 filter bands could be properly calibrated, so the number of stars has been reduced from 20704 to 17301.
(End) Eric Sandquist [San Diego State Univ.], Patricia Vannier [CDS] 29-Jun-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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