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J/AJ/131/1565    UBVI photometry of Berkeley 17 and NGC 188    (Krusberg+, 2006)

UBVI CCD photometry of the old open cluster Berkeley 17. Krusberg Z.A.C., Chaboyer B. <Astron. J., 131, 1565-1573 (2006)> =2006AJ....131.1565K
ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, UBVRI Keywords: Galaxy: disk - Galaxy: formation - open clusters and associations: general - open clusters and associations: individual (NGC 188, Berkeley 17) Abstract: Photometric UBVI CCD photometry is presented for NGC 188 and Berkeley 17. Color-magnitude diagrams (CMDs) are constructed and reach well past the main-sequence turnoff for both clusters. Cluster ages are determined by means of isochrone fitting to the cluster CMDs. These fits are constrained to agree with spectroscopic metallicity and reddening estimates. Cluster ages are determined to be 7.0±0.5Gyr for NGC 188 and 10.0±1.0Gyr for Berkeley 17, where the errors refer to uncertainties in the relative age determinations. Description: Observations were made at the MDM Observatory 1.3m McGraw-Hill telescope for 13 nights between 2004 September 7 and 19. Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 05 20 36 +30 36.0 Cl Berkeley 17 = C 0517+305 00 48 26.0 +85 15 18 NGC 188 = C 0039+850 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 48 536 NGC 188 Photometry table3.dat 48 1239 Berkeley 17 photometry
See also: J/ApJ/483/826 : BVI CCD photometry of Berkeley 17 (Phelps 1997) J/A+A/390/961 : VI photometry in NGC 188 (Andreuzzi+, 2002) J/PASP/116/1012 : A star catalog for the open cluster NGC 188 (Stetson+, 2004) Byte-by-byte Description of file: table2.dat table3.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Star number (1) 6- 13 F8.3 pix Xpos The X pixel coordinate 15- 22 F8.3 pix Ypos The Y pixel coordinate 24- 28 F5.2 mag Umag ?=99.99 The U band (Bessell) magnitude 30- 34 F5.2 mag Bmag ?=99.99 The B band (Harris) magnitude 36- 40 F5.2 mag Vmag ?=99.99 The V band (Harris) magnitude 42- 46 F5.2 mag Imag ?=99.99 The I band (Arizona) magnitude 48 I1 --- Memb ? [0/1] Berkeley 17 member? (only in Table 3) (2)
Note (1): Table 2: Cl* NGC 188 KC NNN in Simbad Table 3: Cl* Berkeley 17 KC NNNN in Simbad Note (2): Membership, takes the values: 0 = the star has a low reddening and is not a member of the cluster 1 = the star has a reddening consistent with being a member of the cluster.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 08-Feb-2007
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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