J/A+A/459/321 BV photometry of M31 eclipsing binaries (Vilardell+, 2006)
Eclipsing binaries suitable for distance determination in the Andromeda galaxy.
Vilardell F., Ribas I., Jordi C.
<Astron. Astrophys. 459, 321 (2006)>
=2006A&A...459..321V 2006A&A...459..321V
ADC_Keywords: Stars, variable ; Binaries, eclipsing ; Photometry, UBV
Keywords: stars: variables: general - stars: binaries: eclipsing -
stars: fundamental parameters - stars: distances -
techniques: photometric - catalogs
Abstract:
Broad band photometry (in Johnson B and V) has been obtained in a
region (34'x34') at the North-Eastern quadrant of M31 over 5 years
(1999-2003) at the Isaac Newton Telescope (La Palma, Spain). The data,
containing more than 250 observations per filter, have been reduced by
means of the so-called difference image analysis technique and the
DAOPHOT program. A catalog with 236238 objects with photometry in both
B and V passbands has been obtained. The catalog is the deepest
(V<25.5mag) obtained so far in the studied region and contains 3964
identified variable stars, with 437 eclipsing binaries and 416
Cepheids.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 157 236238 List of all stars
table4.dat 106 3964 List of variable stars
table5a/* . 3964 V light curves for all the variable stars
table5b/* . 3964 B light curves for all the variable stars
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See also:
J/AJ/115/1894 : DIRECT M31A eclipsing binaries & Cepheids (Stanek+ 1998)
J/AJ/115/1016 : DIRECT M31B eclipsing binaries & Cepheids (Kaluzny+ 1998)
J/AJ/117/2810 : DIRECT M31C eclipsing binaries & Cepheids (Stanek+, 1999)
J/AJ/118/346 : DIRECT M31D eclipsing binaries & Cepheids (Kaluzny+ 1999)
J/AJ/118/2211 : DIRECT M31F eclipsing binaries & Cepheids (Mochejska+ 1999)
J/A+A/421/509 : AGAPE catalogue of M31 variables (Ansari+, 2004)
J/MNRAS/351/1071 : POINT-AGAPE Survey. M31 variables (An+, 2004)
J/AJ/129/2663 : B phot. of M31 variable star candidates (Williams+, 2005)
J/AJ/131/2478 : Local Group Galaxies Survey (LGGS) (Massey+, 2006)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- Name Object identifier
24- 31 F8.5 deg RAdeg Right Ascension J2000 (degrees)
33- 40 F8.5 deg DEdeg Declination J2000 (degrees)
42- 47 F6.3 mag Vmag Johnson V standard magnitude
49- 53 F5.3 mag e_Vmag V standard error
55- 60 F6.3 mag Bmag Johnson B standard magnitude
62- 66 F5.3 mag e_Bmag B standard error
68-157 A90 --- ONames Identifier in GSC, DIRECT or LGGS (Massey et
al., 2006AJ....131.2478M 2006AJ....131.2478M)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [M31V_]
6- 22 A17 --- Name *Object identifier
24- 31 F8.5 deg RAdeg Right Ascension J2000 (degrees)
33- 40 F8.5 deg DEdeg Declination J2000 (degrees)
42- 47 F6.3 mag Vmag Mean Johnson V standard magnitude
49- 53 F5.3 mag e_Vmag Mean V standard error
55- 60 F6.3 mag Bmag Mean Johnson B standard magnitude
62- 66 F5.3 mag e_Bmag Mean B standard error
68- 70 I3 --- o_Vmag Number of observations in V
72- 74 I3 --- o_Bmag Number of observations in B
76- 87 F12.4 d RefHJD Reference time (Heliocentric Julian days)
89- 98 F10.6 d Period Period (days)
100-106 A7 --- VType Variable type: CEPHEID or EB (eclipsing binary)
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Note on Name:
File names in tables 5a and 5b have been generated from this field.
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Byte-by-byte Description of file: table5a/* table5b/*
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Time of observation (Julian days)
14- 19 F6.3 mag mag Johnson V (table5a) or B (table5b)
standard magnitude
21- 28 F8.3 mag e_mag Magnitude standard error
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Acknowledgements: Francesc Vilardell, fvilarde(at)am.ub.es
(End) Patricia Vannier [CDS] 11-Jul-2006