J/AcA/48/113 OGLE RR Lyrae VI photometry (Udalski, 1998)
The Optical Gravitational Lensing Experiment.
The distance scale: Galactic Bulge - LMC - SMC.
Udalski A.
<Acta Astron., 48, 113 (1998)>
=1998AcA....48..113U 1998AcA....48..113U
ADC_Keywords: Stars, variable ; Photometry, VRI
Keywords: Magellanic Clouds - Galaxy: center - Galaxies: distances and redshifts
Abstract:
We analyze the mean luminosity of three samples of field RRab Lyr
stars observed in the course of the OGLE microlensing experiment:
73 stars from the Galactic bulge and 110 and 128 stars from selected
fields in the LMC and SMC, respectively. The fields are the same as in
the recent distance determination to the Magellanic Clouds with the
red clump stars method by Udalski et al. (1998AcA....48....1U 1998AcA....48....1U).
We determine the relative distance scale Galactic Bulge: 0.194±0.010;
LMC: 1.00 ; SMC: 1.30±0.08. We calibrate our RR Lyr distance scale
with the recent calibration of Gould and Popowski
(1998ApJ...508..844G 1998ApJ...508..844G) based on statistical parallaxes. We obtain the
following distance moduli to the Galactic bulge, LMC and SMC:
m-M=14.5±0.15, m-M=18.09±0.16 and m-M=18.66±0.16mag.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 74 128 RR Lyrae in the SMC field
table2.dat 76 110 RR Lyrae in the LMC field
table3.dat 42 73 RR Lyrae in the Baade's window
--------------------------------------------------------------------------------
See also:
I/244 : OGLE General Catalog of Stars. I. (Szymanski+ 1996)
II/213 : OGLE Galactic Bulge periodic variables (Udalski+ 1996)
J/A+AS/112/407 : OGLE variables in Sculptor dwarf galaxy (Kaluzny+, 1995)
J/A+AS/125/343 : OGLE RR Lyr stars in omega Cen (Kaluzny+ 1997)
J/AcA/46/389 : OGLE miscellaneous variable stars (Olech 1996)
J/AcA/48/147 : OGLE SMC BVI photometry (Udalski+ 1998)
J/AcA/48/175 : OGLE SMC clusters (Pietrzynski+ 1998)
I/221 : The Magellanic Catalogue of Stars - MACS (Tucholke+ 1996)
Byte-by-byte Description of file: table1.dat, table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- SC Star cluster designation (SMC-SCNN or LMC-SCNN)
10- 15 I6 --- Seq Sequential number (1)
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 27 F5.2 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
41- 47 F7.5 d Per Period
49- 61 F13.5 d HJD Heliocentric Julian date T0
63- 68 F6.3 mag <I0mag> Average deredenned I magnitude
70- 74 F5.3 mag <(V-I)0> ? Average deredenned V-I colour index
--------------------------------------------------------------------------------
Note (1): In simbad, OGLE SMC-SCNN NNNNNN or OGLE LMC-SCNN NNNNNN
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Star Star designation BWN-VNN
(OGLE BWN VNN in simbad)
9- 15 F7.5 d Per Period
17- 29 F13.5 d HJD Heliocentric Julian date T0
31- 36 F6.3 mag <I0mag> Average deredenned I magnitude
38- 42 F5.3 mag <(V-I)0> Average deredenned V-I colour index
--------------------------------------------------------------------------------
History: Prepared via OCR at CDS.
(End) Patricia Bauer [CDS] 26-May-1999