J/A+A/402/509 uvby photometry of four MC eclipsing binaries (Clausen+, 2003)
Eclipsing binaries in the Magellanic Clouds. uvby CCD light curves and
photometric analyses for HV982 (LMC), HV12578 (LMC), HV1433 (SMC),
and HV11284 (SMC).
Clausen J.V., Storm J., Larsen S.S., Gimenez A.
<Astron. Astrophys. 402, 509 (2003)>
=2003A&A...402..509C 2003A&A...402..509C
ADC_Keywords: Magellanic Clouds ; Binaries, eclipsing ; Photometry, uvby ;
Photometry, CCD
Keywords: cosmology: distance scale - galaxies: Magellanic clouds -
stars: fundamental parameters - stars: binaries: close -
stars: binaries: eclipsing - techniques: photometric
Description:
We present new accurate CCD uvby light curves for the LMC eclipsing
binaries HV 982 and HV 12578, and for the SMC systems HV 1433 and
HV 11284 obtained at the Danish 1.5m telescope at ESO, La Silla,
equipped with a direct camera and CCD #28 (a thinned 1024x1024 Tek
device), during several periods between November 1992 and November
1995. The light curves were derived from DoPHOT photometry, and
typical accuracies are between 0.007 and 0.012mag per point. Standard
uvby indices have also been established for each binary, primarily for
determination of interstellar reddening and absorption. For HV 982 and
HV 12578, accurate photometric elements have been established. Both
systems consist of two detached components of comparable sizes in an
eccentric orbit.
Objects:
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RA (2000) DE Designation(s)
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05 29 53.0 -69 09 23 HV 982
05 21 32.0 -66 21 15 HV 12578
00 47 11.0 -73 41 18 HV 1433
00 49 43.0 -72 51 10 HV 11284
----------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
summary.dat 69 16 Epoch of ephemeris and orbital periods
table25.dat 68 314 y light curve of HV 982
table26.dat 68 124 b light curve of HV 982
table27.dat 68 115 v light curve of HV 982
table28.dat 68 103 u light curve of HV 982
table29.dat 68 194 y light curve of HV 12578
table30.dat 68 71 b light curve of HV 12578
table31.dat 68 65 v light curve of HV 12578
table32.dat 68 53 u light curve of HV 12578
table33.dat 68 84 y light curve of HV 1433
table34.dat 68 38 b light curve of HV 1433
table35.dat 68 33 v light curve of HV 1433
table36.dat 68 30 u light curve of HV 1433
table37.dat 68 219 y light curve of HV 11284
table38.dat 68 81 b light curve of HV 11284
table39.dat 68 70 v light curve of HV 11284
table40.dat 68 63 u light curve of HV 11284
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See also:
J/A+A/364/455 : ubvy photometry of LMC/SMC B stars (Larsen+, 2000)
Byte-by-byte Description of file: summary.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name of the binary
11- 12 I2 h RAh Right ascension (J2000)
14- 15 I2 min RAm Right ascension (J2000)
17- 20 F4.1 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign (J2000)
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 30 I2 arcsec DEs Declination (J2000)
33- 35 I3 --- Nobs Number of observations
38- 50 F13.5 d T0 Epoch of ephemeris
53- 61 F9.7 d Per Period
64 A1 --- Filt [ubvy] Filter
68- 69 I2 --- Tab Table number
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Byte-by-byte Description of file: table??.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name of binary
10 A1 --- Filter [ubvy] Filter
12- 25 F14.6 d HJD Heliocentric Julian Date at mid-exposure
28- 34 F7.5 --- Phase [0-1[ Orbital phase, calculated from T0 and
P given in summary.dat file
36- 42 F7.3 mag mag Magnitude (DoPHOT)
44- 48 F5.3 mag e_mag Error of magnitude (DoPHOT)
51- 54 A4 --- Frame Internal frame number
56- 62 F7.2 --- Sky ?=9999.99 Sky background level (in ADU);
9999.99 when not measured
64- 68 F5.2 pix Seeing ?=99.99 Seeing ; the scale is 0.38"/pixel;
99.99 when not measured
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Acknowledgements: Jens Viggo Clausen
(End) Patricia Bauer [CDS] 23-Apr-2003