J/AJ/134/1963 MACHO r,b light curves of MC eclipsing binaries (Faccioli+, 2007)
Eclipsing binary stars in the Large and Small Magellanic Clouds from the MACHO
project: the sample.
Faccioli L., Alcock C., Cook K., Prochter G.E., Protopapas P., Syphers D.
<Astron. J., 134, 1963-1993 (2007)>
=2007AJ....134.1963F 2007AJ....134.1963F
ADC_Keywords: Magellanic Clouds ; Binaries, eclipsing ; Photometry, UBV
Keywords: binaries: eclipsing - Magellanic Clouds - surveys
Abstract:
We present a new sample of 4634 eclipsing binary stars in the Large
Magellanic Cloud (LMC), expanding on a previous sample of 611 objects
and a new sample of 1509 eclipsing binary stars in the Small
Magellanic Cloud (SMC), that were identified in the light-curve
database of the MACHO project. We perform a cross-correlation with the
OGLE-II LMC sample, finding 1236 matches. A cross correlation with the
OGLE-II SMC sample finds 698 matches. We then compare the LMC
subsamples corresponding to the center and periphery of the LMC and
find only minor differences between the two populations. These samples
are sufficiently large and complete that statistical studies of the
binary star populations are possible.
Description:
All light curves can be downloaded at:
http://www.macho.mcmaster.ca/Data/MachoData.html
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 106 4634 Basic data for the LMC Eclipsing Binaries (EBs)
table7.dat 106 1509 Basic data for the SMC Eclipsing Binaries (EBs)
lmclc/* . 4634 Individual instrumental "red" and "blue" light
curves for LMC EBs
smclc/* . 1509 Individual instrumental "red" and "blue" light
curves for SMC EBs
lc/* . 8391 Individual light curves in "red" band (4085) and
"blue" band (4306) for LMC EBs
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See also:
II/247 : Variable stars in the Large Magellanic Clouds (MACHO, 2001)
J/ApJ/663/249 : LMC eclipsing binaries in the MACHO database (Derekas+, 2007)
Byte-by-byte Description of file: table[47].dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- MACHO MACHO ID (Field.Tile.Sequence)
16- 17 I2 h RAh Hour of Right Ascension (J2000)
19- 20 I2 min RAm Minute of Right Ascension (J2000)
22- 27 F6.3 s RAs Second of Right Ascension (J2000)
29 A1 --- DE- Sign of the Declination (J2000)
30- 31 I2 deg DEd Degree of Declination (J2000)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000)
36- 40 F5.2 arcsec DEs Arcsecond of Declination (J2000)
42- 51 F10.5 d PerV Period from the MACHO "blue" lightcurve
53- 62 F10.5 d PerR Period from the MACHO "red" lightcurve
64- 68 F5.2 mag Vmag ?=99.99 Median "blue" band magnitude (1)
70- 73 F4.2 mag e_Vmag ?=9.99 Error in Vmag (1)
75- 79 F5.2 mag Rmag ?=99.99 Median R band magnitude (1)
81- 84 F4.2 mag e_Rmag ?=9.99 Error in Rmag (1)
86- 90 F5.2 mag Vbase ?=99.99 Baseline "blue" band magnitude (1)
92- 95 F4.2 mag e_Vbase ?=9.99 Error in VBmag (1)
97-101 F5.2 mag Rbase ?=99.99 Baseline R band magnitude (1)
103-106 F4.2 mag e_Rbase ?=9.99 Error in RBmag (1)
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Note (1): the "blue" MACHO filter covers the wavelength range 440-590mn;
and the "red" MACHO filter covers the wavelength range 590-780nm.
Photometry and errors of "99.99" and "9.99" indicate that there were
no valid VMACHO magnitudes in the light curve so the transformation
to standard magnitudes was not possible.
The "baseline" magnitude is calculated in the following way. First the
outlying points are eliminated by dividing the light curve in boxes of
∼50 data points and eliminating the points which are more than 2σ
away from the mean in each box. Then the median of the 10% most
luminous points is taken. This value is not the median of the whole
light curve that is shown in the figures.
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Byte-by-byte Description of file (#): lmclc/* smclc/*
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Bytes Format Units Label Explanations
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3- 11 F9.4 d Date HJD-2449000
16- 22 F7.3 mag rmag ?=-99.000 Instrumental "red" magnitude
26- 32 F7.3 mag e_rmag ?=-99.000 rms uncertainty on rmag
37- 43 F7.3 mag bmag ?=-99.000 Instrumental "blue" magnitude
47- 53 F7.3 mag e_bmag ?=-99.000 rms uncertainty on bmag
59- 63 I5 --- ObsID Observation ID
69 I1 --- Tran [0] Transit
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Byte-by-byte Description of file: lc/*
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Bytes Format Units Label Explanations
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1- 12 F12.6 d Date HJD-2400000
14- 22 F9.6 mag mag "blue" or "red" magnitude
24- 31 F8.6 mag e_mag rms uncertainty on mag
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Jan-2010