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J/AJ/125/1383       Stromgren photometry of NGC 6253     (Anthony-Twarog+, 2003)

CCD uvbyCaHβ photometry of clusters. III. The most metal-rich open cluster, NGC 6253. Twarog B.A., Anthony-Twarog B.J., de Lee N. <Astron. J. 125, 1383 (2003)> =2003AJ....125.1383T
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, uvby Keywords: color-magnitude diagrams - open clusters and associations: individual (NGC 6253) Abstract: CCD photometry on the intermediate-band uvbyCaH system is presented for the old open cluster NGC 6253. Despite a high level of field star contamination because of its location toward the Galactic center, combination of the data from the multiple color indices with the core cluster sample derived from radial star counts leads to the identification of a set of highly probable, single cluster members. Description: The new photometric data for NGC 6253 were obtained using the Cassegrain focus CCD imager on the National Optical Astronomy Observatory's 0.9m telescope at Cerro Tololo Inter-American Observatory. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 111 3808 New extended Stroemgren and Hβ photometry in NGC 6253
See also: J/AJ/119/2282 : Stromgren photometry of IC 4651 (Anthony-Twarog+, 2000) J/AJ/127/1000 : Stromgren photometry of NGC 3680 (Anthony-twarog+, 2004) J/AJ/129/872 : Stromgren photometry of NGC 2243 (Anthony-Twarog+, 2005) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 F6.1 pix Xpos The X pixel coordinate (1) 8- 14 F7.1 pix Ypos The Y pixel coordinate (1) 17- 20 I4 --- WEBDA ? The WEBDA identification number 23- 28 F6.3 mag Vmag The V-band magnitude 32- 36 F5.3 mag b-y Stroemgren (b-y) color 39- 44 F6.3 mag m1 ? Stroemgren m1 index 47- 52 F6.3 mag c1 ? Stroemgren c1 index 56- 60 F5.3 mag Hbeta ? The Hβ index magnitude 63- 68 F6.3 mag hk ? The hk index magnitude [(Ca-b) - (b-y)] 71- 75 F5.3 mag e_Vmag Error in Vmag (2) 78- 82 F5.3 mag e_b-y Error in b-y (2) 85- 89 F5.3 mag e_m1 ? Error in m1 (2) 92- 96 F5.3 mag e_c1 ? Error in c1 (2) 99-103 F5.3 mag e_Hbeta ? Error in Hbeta (2) 106-110 F5.3 mag e_hk ? Error in hk (2)
Note (1): On the (X,Y)-system for the cluster developed by WEBDA. [TAD2003] XXXX.x+YYYY.y in Simbad. Note (2): Standard errors of the mean for indices based on frame-to-frame dispersion in magnitudes rather than IRAF formal errors.
History: From electronic version of the journal References: Anthony-Twarog & Twarog, Paper I 2000AJ....119.2282A, Cat. J/AJ/119/2282 Anthony-Twarog & Twarog, Paper II 2000AJ....120.3111A Anthony-Twarog & Twarog, Paper IV 2004AJ....127.1000A, Cat. J/AJ/127/1000 Anthony-Twarog et al., Paper V 2005AJ....129..872A, Cat. J/AJ/129/872
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 26-May-2003
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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