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J/PASP/106/404             NGC 6535 BV CCD photometry         (Sarajedini, 1994)

CCD photometry of the galactic globular cluster NGC6535 in the B and V passbands SARAJEDINI A. <Publ. Astron. Soc. Pac. 106, 404 (1994)> =1994PASP..106..404S (SIMBAD/NED Reference)
ADC_Keywords: Clusters, globular; Photometry, CCD Abstract: The first CCD color-magnitude diagram (CMD) in B and V is presented for the Galactic globular cluster NGC 6535. From this CMD, which extends below the main-sequence turnoff, we draw the following conclusions: (1) The horizontal branch (HB) is predominantly blue in nature with no RR Lyrae variables known to be cluster members. Nonetheless, based on a comparison with clusters which have blue HBs and RR Lyraes (M15 and M79), we infer a mean HB magnitude of <V(RR)≥15.73±0.11 for NGC 6535. (2) Again, via a direct comparison with the blue HBs of M15 and M79, we derive a cluster reddening of E(B-V)=0.44±0.02. (3) When combined with the apparent color of the red-giant branch at the level of the HB, (B-V)g=1.18±0.02, the derived reddening yields a metal abundance of [Fe/H]=-1.85±0.10, similar to that of NGC 6397. (4) Application of the Delta(V(TO-HB)) and Delta((B-V)(SGB-TO)) cluster dating techniques reveals no perceptible age difference between NGC 6535 and NGC 6397. (5) A significant population of nine blue-straggler candidates is detected in NGC 6535. However, this is too few to facilitate a meaningful analysis of their radial distribution. Addresses: Sarajedini A. Kitt Peak National Observatory, National Optical Astronomy Observatories, P.O. Box 26732, Tucson, Arizona 85726-6732 Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 18 03 50.6 -00 17 49 NGC 6535 = C 1801-003 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 38 932 Photometry of NGC 6535
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ID Star number 7- 13 F7.2 pix X X CCD coordinate 16- 22 F7.2 pix Y Y CCD coordinate 25- 29 F5.2 mag Vmag Visual magnitude 32- 35 F4.2 mag B-V B-V color 38 I1 --- o_Vmag Number of observations
Origin: AAS CD-ROM series, Volume 2, 1994
(End) Lee Brotzman [ADS] 21-May-1994, Patricia Bauer [CDS] 03-Nov-1994
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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