J/AJ/133/1409 u'g'r'i'z' photometry in NGC 188 (Fornal+, 2007)
A survey of open clusters in the u'g'r'i'z' filter system.
III. Results for the cluster NGC 188.
Fornal B., Tucker D.L., Smith J.A., Allam S.S., Rider C.J., Sung H.
<Astron. J., 133, 1409-1420 (2007)>
=2007AJ....133.1409F 2007AJ....133.1409F
ADC_Keywords: Clusters, open ; Photometry, SDSS
Keywords: Hertzsprung-Russell diagram -
open clusters and associations: individual (NGC 188) -
stars: abundances
Abstract:
We continue our series of papers describing the results of a
photometric survey of open star clusters, primarily in the southern
hemisphere, taken in the u'g'r'i'z' filter system. The entire observed
sample covered more than 100 clusters, but here we present data only
on NGC 188, which is one of the oldest open clusters known in the
Milky Way. We fit the Padova theoretical isochrones to our data.
Assuming a solar metallicity for NGC 188, we find a distance of
1700±100pc, an age of 7.5±0.7Gyr, and a reddening E(B-V) of
0.025±0.005. This yields a distance modulus of 11.23±0.14.
Description:
The five filters of the u'g'r'i'z' system have effective wavelengths
of 3540, 4750, 6222, 7632, and 9049Å, respectively.
For this paper, we are using data from the USNO 1.0m telescope. The
observations for NGC 188 were obtained on 2002 November 5 (UT) as part
of a four-night observing run.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 113 571 Available Data from the USNO 1.0m Telescope
for NGC 188
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See also:
II/185 : Photographic UBV photometry of NGC 188 stars (Frolov, 1990)
J/A+A/390/961 : VI photometry in NGC 188 (Andreuzzi+, 2002)
J/AJ/124/601 : NGC 188 absolute positions & proper motions (Platais+, 2002)
J/AJ/126/2922 : Astrometry and membership in NGC 188 (Platais+, 2003)
J/PASP/116/1012 : A star catalog for the open cluster NGC 188 (Stetson+, 2004)
J/A+A/438/291 : X-ray sources in NGC 188 (Gondoin+, 2005)
J/AJ/131/1565 : UBVI photometry of Berkeley 17 and NGC 188 (Krusberg+, 2006)
J/AJ/127/2210 : u'g'r'i'z' photometry in NGC 2548 (M48),Paper I (Rider+ 2004)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- FTS Star identification number,
Cl* NGC 188 FTS NNN in Simbad (1)
5- 8 I4 --- WEBDA ?=-1 The webda identification number (2)
10- 11 I2 h RAh Hour of Right Ascension (J2000)
13- 14 I2 min RAm Minute of Right Ascension (J2000)
16- 20 F5.2 s RAs Second of Right Ascension (J2000)
22 A1 --- DE- Sign of Declination (J2000)
23- 24 I2 deg DEd Degree of Declination (J2000)
26- 27 I2 arcmin DEm Arcminute of Declination (J2000)
29- 31 F3.0 arcsec DEs Arcsecond of Declination (J2000)
33- 38 F6.3 mag u'mag ? The u' band magnitude (3)
40- 45 F6.3 mag g'mag ? The g' band magnitude (3)
47- 52 F6.3 mag r'mag ? The r' band magnitude (3)
54- 59 F6.3 mag i'mag ? The i' band magnitude (3)
61- 66 F6.3 mag z'mag ? The z' band magnitude (3)
68- 72 F5.3 mag e_u'mag ? Error (photon noise) in u'mag
74- 78 F5.3 mag e_g'mag ? Error (photon noise) in g'mag
80- 84 F5.3 mag e_r'mag ? Error (photon noise) in r'mag
86- 90 F5.3 mag e_i'mag ? Error (photon noise) in i'mag
92- 96 F5.3 mag e_z'mag ? Error (photon noise) in z'mag
98 I1 --- f_u'mag [0,1] Flag on u'mag (4)
100 I1 --- f_g'mag [0,1] Flag on g'mag (4)
102 I1 --- f_r'mag [0,1] Flag on r'mag (4)
104 I1 --- f_i'mag [0,1] Flag on i'mag (4)
106 I1 --- f_z'mag [0,1] Flag on z'mag (4)
108-109 I2 % Mm Membership probability from
Platais et al. (2003, Cat. J/AJ/126/2922)
111-113 A3 --- Comm Comments (5)
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Note (1): ID numbers are ordered in increasing r' magnitude. For multiple
observations of a star the r' magnitude with smallest error is used.
Note (2): -1 = no webda entry matching the star's coordinates.
Note (3): Not corrected for reddening, unlike the tables presented in
Rider et al. (2004, Cat. J/AJ/127/2210).
Note (4): 1 = saturation or no detection in the filter.
Note (5): Comments as follows:
a = |(g'-r')-2.5(r'-i')|>0.5mag
b = double star
c = bright star nearby
d = bright star saturation
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 08-Feb-2009