J/AcA/64/177 VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2014)
Over 38000 RR Lyrae stars in the OGLE Galactic Bulge Fields.
Soszynski I., Udalski A., Szymanski M.K., Pietrukowicz P., Mroz P.,
Skowron J., Kozlowski S., Poleski R., Skowron D., Pietrzynski G.,
Wyrzykowski L., Ulaczyk K., Kubiak M.
<Acta Astron., 64, 177-196 (2014)>
=2014AcA....64..177S 2014AcA....64..177S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Magnitudes
Keywords: stars: variables: RR Lyrae -
stars: oscillations (including pulsations) - stars: Population II -
Galaxy: center -
galaxies: individual: Sagittarius Dwarf Spheroidal Galaxy
Abstract:
We present the most comprehensive picture ever obtained of the central
parts of the Milky Way probed with RR Lyr variable stars. This is a
collection of 38257 RR Lyr stars detected over 182 square degrees
monitored photometrically by the Optical Gravitational Lensing
Experiment (OGLE) in the most central regions of the Galactic bulge.
The sample consists of 16804 variables found and published by the
OGLE collaboration in 2011 and 21453 RR Lyr stars newly detected in
the photometric databases of the fourth phase of the OGLE survey
(OGLE-IV). 93% of the OGLE-IV variables were previously unknown. The
total sample consists of 27 258 RRab, 10825 RRc, and 174 RRd stars.
We provide OGLE-IV I- and V-band light curves of the variables along
with their basic parameters.
About 300 RR Lyr stars in our collection are plausible members of 15
globular clusters. Among others, we found the first pulsating
variables that may belong to the globular cluster Terzan 1 and the
first RRd star in the globular cluster M54. Our survey also covers the
center and outskirts of the Sagittarius Dwarf Spheroidal Galaxy
enabling studies of the spatial distribution of the old stellar
population from this galaxy.
Description:
The OGLE-IV survey conducts long-term, continuous observations of the
fields toward the Galactic bulge using the 1.3m Warsaw telescope
located at the Las Cam- panas Observatory (LCO) in Chile. The
observatory is operated by the Carnegie Institution for Science.
OGLE-IV began observations of the Galactic bulge in March 2010 and
regular monitoring has been continued up to now. The latest
observations used in this study were collected in October 2013, with
the exception of several fields with a relatively small number of
points, for which we used observations collected up to September 2014.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
ident.dat 123 38257 Identification of stars
rrab.dat 105 27258 Parameters of RRab stars
rrc.dat 105 10826 Parameters of RRc stars
rrd.dat 173 173 Parameters of RRd stars
gc.dat 110 335 RR Lyr stars that are candidates for the
globular cluster members
remarks.dat 92 91 Remarks on selected objects
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See also:
II/213 : OGLE Galactic Bulge periodic variables (Udalski+ 1996)
J/ApJ/651/197 : OGLE Galactic Bulge fundamental-mode RR Lyrae (Collinge+, 2006)
J/AcA/61/1 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2011)
Byte-by-byte Description of file: ident.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- --- [OGLE-BLG-RRLYR-]
16- 20 I05 --- Star [1/38289] Star number (OGLE-BLG-RRLYR-NNNNN)
23- 26 A4 --- Type Subtype of RR Lyr star (RRab, RRc, RRd)
29- 30 I2 h RAh Right ascension, equinox J2000.0 (hours)
32- 33 I2 min RAm Right ascension, equinox J2000.0 (minutes)
35- 39 F5.2 s RAs Right ascension, equinox J2000.0 (seconds)
41 A1 --- DE- Declination, equinox J2000.0 (sign)
42- 43 I2 deg DEd Declination, equinox J2000.0 (degrees)
45- 46 I2 arcmin DEm Declination, equinox J2000.0 (arc minutes)
48- 51 F4.1 arcsec DEs Declination, equinox J2000.0 (arc seconds)
54- 69 A16 --- OGLEIV OGLE-IV ID, BLGNNN.NN.NNNNN
71- 85 A15 --- OGLEIII OGLE-III ID, BLGNNN.N.NNNNN
87-102 A16 --- OGLEII OGLE-II ID, BULSCNNNNNNN
103-123 A21 --- OName Other designation (from VSX)
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Byte-by-byte Description of file: rrab.dat rrc.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- --- [OGLE-BLG-RRLYR-]
16- 20 I05 --- Star Star number (OGLE-BLG-RRLYR-NNNNN)
23- 28 F6.3 mag <Imag> Intensity mean I-band magnitude
30- 35 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
38- 47 F10.8 d Per Period
49- 58 F10.8 d e_Per Uncertainty of period
61- 70 F10.5 d t0 Time of maximum brightness (HJD-2450000)
73- 77 F5.3 mag Iamp I-band amplitude (maximum-minimum)
80- 84 F5.3 --- R21 Fourier coefficient R_21
86- 90 F5.3 --- phi21 ?=- Fourier coefficient phi_21
93- 97 F5.3 --- R31 Fourier coefficient R_31
99-103 F5.3 --- phi31 ?=- Fourier coefficient phi_31
105 A1 --- LC [*] * indicates available light curve
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Byte-by-byte Description of file: rrd.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- --- [OGLE-BLG-RRLYR-]
16- 20 I05 --- Star Star number (OGLE-BLG-RRLYR-NNNNN)
23- 28 F6.3 mag <Imag> Intensity mean I-band magnitude
30- 35 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
38- 47 F10.8 d Per1 First-overtone period
49- 58 F10.8 d e_Per1 Uncertainty of first-overtone period
61- 70 F10.5 d t0.1 Time of maximum brightness (HJD-2450000)
73- 77 F5.3 mag Iamp1 I-band amplitude (maximum-minimum)
80- 84 F5.3 --- R21.1 Fourier coefficient R21
86- 90 F5.3 --- phi21.1 ?=- Fourier coefficient phi21
93- 97 F5.3 --- R31.1 Fourier coefficient R31
99-103 F5.3 --- phi31.1 ?=- Fourier coefficient phi31
106-115 F10.8 d Per0 Fundamental-mode period
117-126 F10.8 d e_Per0 Uncertainty of fundamental-mode period
129-138 F10.5 d t0.0 Time of maximum brightness (HJD-2450000)
141-145 F5.3 mag Iamp0 I-band amplitude (maximum-minimum)
148-152 F5.3 --- R21.0 Fourier coefficient R_21
154-158 F5.3 --- phi21.0 ?=- Fourier coefficient phi_21
161-165 F5.3 --- R31.0 Fourier coefficient R_31
167-171 F5.3 --- phi31.0 ?=- Fourier coefficient phi_31
173 A1 --- LC [*] * indicates available light curve
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Byte-by-byte Description of file: gc.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- --- [OGLE-BLG-RRLYR-]
16- 20 I05 --- Star Star number (OGLE-BLG-RRLYR-NNNNN)
23- 32 A10 --- Cluster Cluster name
33- 37 A5 --- VName Variable name
41-110 A70 --- Com Comments
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Byte-by-byte Description of file: remarks.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- --- [OGLE-BLG-RRLYR-]
16- 20 I05 --- Star Star number (OGLE-BLG-RRLYR-NNNNN)
22- 92 A71 --- Rem Remarks
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History:
Copied at ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/blg/rrlyr
(End) Patricia Vannier [CDS] 25-Nov-2015