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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 111 3808 New extended Stroemgren and Hβ photometry
in NGC 6253
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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
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Bytes Format Units Label Explanations
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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)
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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.
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History:
From electronic version of the journal
References:
Anthony-Twarog & Twarog, Paper I 2000AJ....119.2282A 2000AJ....119.2282A, Cat. J/AJ/119/2282
Anthony-Twarog & Twarog, Paper II 2000AJ....120.3111A 2000AJ....120.3111A
Anthony-Twarog & Twarog, Paper IV 2004AJ....127.1000A 2004AJ....127.1000A, Cat. J/AJ/127/1000
Anthony-Twarog et al., Paper V 2005AJ....129..872A 2005AJ....129..872A, Cat. J/AJ/129/872
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 26-May-2003