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J/A+AS/123/1 uvbyBeta photometry of ZZ UMa (Clement+ 1997)
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Four clour photometry of late-type binary systems.
I. First uvby{beta} light curves of ZZ Ursae Majoris.
Clement R., Garcia M., Reglero V., Clausen J.V., Bravo A., Suso J.,
Fabregat J., Torrejon J.M., Reig P., Marco A.
<Astron. Astrophys. Suppl. Ser. 123, 1 (1997)>
=1997A&AS..123....1C (SIMBAD/NED BibCode)
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ADC_Keywords: Binaries, eclipsing ; Photometry, uvby, beta
Keywords: stars: binaries: eclipsing - stars: late-type -
stars: fundamental parameters - stars: individual: ZZ UMa
Abstract:
This paper presents first complete uvby light curves of the late-type
detached eclipsing binary ZZ UMa (G0V + G8V, P=2.2993d). This binary
system has been observed during eight campaigns at the Calar Alto
Observatory (Almeria, Spain) and at the Sierra Nevada Observatory
(Granada, Spain). 294 points distributed over the binary period and
covering both eclipses are given. The comparison stars used
to calculate the differential light curves (SAO 15242 and SAO 15251)
were confirmed as being good reference stars with constant flux. These
observations are part of a 6 year uvby and H{beta} monitoring program
of low mass eclipsing binaries whose main objective is to provide
accurate absolute astrophysical parameters for late-type main sequence
stars. Details about the standardisation process and accuracy of the
photometry are also given. The internal accuracy of the standard
photometry measured as the mean RMS of the differences between
standard and observed values for the standard stars observed along the
program is only a few millimagnitudes. Detailed analysis of ZZ UMa,
based on these light curves, will be published separately (Clement et
al., 1997, Cat. <J/A+AS/123/59>).
Objects:
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RA (2000) DE Designation(s)
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10 30 03.0 +61 48 41 ZZ UMa = BD+62 1132
10 38 10.0 +61 46 27 SAO 15242 = BD+62 1138
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig1.ps 99 4666 ZZ UMa differential light curve. y filter
table2.dat 103 38 Standard stars used in the program campaigns
table2.tex 111 242 LaTeX version of table2
table3.dat 41 294 Differential magnitudes (ZZ UMa - SAO 15242)
table3.tex 81 484 LaTeX version of table3
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See also:
J/A+AS/123/59 : uvby photometry of BH Vir (Clement+ 1997)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Campaign Order number of one or more of the 16 campaigns
carried out inside the observational program,
in which the standard star was observed
10- 11 I2 --- No Total number of measurements
13- 22 A10 --- Name Star name
24- 28 F5.3 mag ymag y magnitude
30- 31 I2 mmag e_ymag ? rms uncertainty on ymag
33- 38 F6.3 mag b-y b-y color index
40 I1 mmag e_b-y ? rms uncertainty on b-y
42- 46 F5.3 mag m1 m1 color index
48- 49 I2 mmag e_m1 ? rms uncertainty on m1
51- 55 F5.3 mag c1 c1 color index
57- 58 I2 mmag e_c1 ? rms uncertainty on c1
60- 64 F5.3 mag beta ? Hbeta color index
66- 67 I2 mmag e_beta ? rms uncertainty on beta
69- 74 F6.3 mag dymag Standard minus observed values in y (1)
76- 81 F6.3 mag db-y Standard minus observed values in b-y (1)
83- 88 F6.3 mag dm1 Standard minus observed values in m1 (1)
90- 95 F6.3 mag dc1 Standard minus observed values in c1 (1)
97-102 F6.3 mag dbeta ? Standard minus observed values in Hbeta (1)
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Note (1): RMS dispersion and averaged values:
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dy db-y dm1 dc1 dbeta
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mean 0.000 0.000 0.000 0.000 0.000
RMS 0.010 0.005 0.005 0.006 0.005
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian day
14- 19 F6.3 mag Dumag Differential u magnitude
21- 26 F6.3 mag Dvmag Differential v magnitude
28- 33 F6.3 mag Dbmag Differential b magnitude
35- 40 F6.3 mag Dymag Differential y magnitude
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(End) Patricia Bauer [CDS] 29-Sep-1996