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 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:
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RA (2000) DE Designation(s)
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05 20 36 +30 36.0 Cl Berkeley 17 = C 0517+305
00 48 26.0 +85 15 18 NGC 188 = C 0039+850
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 46 536 NGC 188 Photometry
table3.dat 48 1239 Berkeley 17 photometry
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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
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Bytes Format Units Label Explanations
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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)
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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.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 08-Feb-2007