J/AcA/67/297 OGLE Galactic center Cepheids and RR Lyrae (Soszynski+, 2017)
The OGLE Collection of Variable Stars.
Classical, Type II, and Anomalous Cepheids toward the Galactic Center.
Soszynski I., Udalski A., Szymanski M.K., Wyrzykowski L., Ulaczyk K.,
Poleski R., Pietrukowicz P., Kozlowski S., Skowron D.M., Skowron J.,
Mroz P., Pawlak M., Rybicki K., Jacyszyn-Dobrzeniecka A.
<Acta Astron. 67, 297-316 (2017)>
=2017AcA....67..297S 2017AcA....67..297S (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Milky Way ; Stars, variable
Keywords: stars: variables: Cepheids - stars: variables: RR Lyrae -
stars: oscillations - Galaxy: center - Catalogs
Abstract:
We present a collection of classical, type II, and anomalous Cepheids
detected in the OGLE fields toward the Galactic center. The sample
contains 87 classical Cepheids pulsating in one, two or three radial
modes, 924 type II Cepheids divided into BL Her, W Vir, peculiar W
Vir, and RV Tau stars, and 20 anomalous Cepheids - first such
objects found in the Galactic bulge. Additionally, we upgrade the OGLE
Collection of RR Lyr stars in the Galactic bulge by adding 828 newly
identified variables. For all Cepheids and RR Lyr stars, we publish
time-series VI photometry obtained during the OGLE-IV project, from
2010 through 2017.
We discuss basic properties of our classical pulsators: their spatial
distribution, light curve morphology, period-luminosity relations,
and position in the Petersen diagram. We present the most interesting
individual objects in our collection: a type II Cepheid with
additional eclipsing modulation, W Vir stars with the period
doubling effect and the RVb phenomenon, a mode-switching RR Lyr star,
and a triple-mode anomalous RRd star.
Description:
The OGLE-IV data set used in this investigation was obtained between
March 2010 and August 2017 with the 1.3-m Warsaw telescope located at
Las Campanas Observatory, Chile (operated by the Carnegie Institution
for Science). A mosaic camera composed of 32 CCD chips with
Johnson-Cousins VI filters was used, providing a field of view of
1.4 square degrees with a pixel scale of 0.26". Details of the
instrument can be found in Udalski et al. (2015AcA....65....1U 2015AcA....65....1U).
In total, 121 OGLE-IV fields toward the Galactic center were searched
for classical pulsating stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 36 32 Reclassified stars from the OGLE-III Catalog
of Variable Stars in the Galactic bulge
ident.dat 133 40112 Identification of stars
cep.dat 236 87 Parameters of Cepheids (fundamental-mode F,
first-overtone 1O, double-mode F/1O,
double-mode 1O/2O and triple-mode 1O/2O/3O)
t2cep.dat 113 924 Parameters of type II Cepheids
acep.dat 113 27 Parameters of fundamental-mode (F) and
first-overtone (F/1O) anomalous Cepheids
rrlyr.dat 181 39074 Parameters of RRab, RRc, RRd and aRRd stars
remarks.dat 92 163 Remarks
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See also:
II/323 : OGLE-III Bulge Photometric Catalog (Szymanski+ 2011)
J/AcA/63/115 : OGLE-III Galactic disk eclipsing binaries (Pietrukowicz+, 2013)
J/AcA/63/135 : New OGLEIII dwarf novae in Galactic disk (Mroz+, 2013)
J/AcA/63/379 : OGLE-III variable stars in Galactic disk area (Pietrukowicz+, 2
J/AcA/64/177 : VI light curves of Galactic Bulge RR Lyrae (Soszynski+, 2014)
J/AcA/66/433 : Gaia DR1 and OGLE variable stars (Udalski+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- --- [OGLE-BLG-]
10- 20 A11 --- Star Star's ID (CEP-NNN T2CEP-NNN RRLYR-NNNNN) (G1)
22- 36 A15 --- Class New classification
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Byte-by-byte Description of file: ident.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Class Classification (CEP T2CEP ACEP RRLYR)
8- 16 A9 --- --- [OGLE-BLG- OGLE-GAL-]
17- 27 A11 --- Star Star's ID (G1)
29- 36 A8 --- Mode Mode(s) of pulsation for Cepheids or
subtype of RR Lyrae (RRab, RRc, RRd, aRRd) (1)
39- 40 I2 h RAh Right ascension (J2000.0)
42- 43 I2 min RAm Right ascension (J2000.0)
45- 49 F5.2 s RAs Right ascension (J2000.0)
51 A1 --- DE- Declination sign (J2000.0)
52- 53 I2 deg DEd Declination (J2000.0)
55- 56 I2 arcmin DEm Declination (J2000.0)
58- 61 F4.1 arcsec DEs Declination (J2000.0)
64- 79 A16 --- OGLE-IV OGLE-IV ID
81- 95 A15 --- OGLE-III OGLE-III ID
97-111 A15 --- OGLE-II OGLE-II ID
113-133 A21 --- OName Other designation (from VSX)
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Note (1): Mode of pulsation as follows:
F = fundamental-mode F
1O = first-overtone 1O
F/1O = double-mode F/1O
1O/2O = double-mode 1O/20
1O/2O/3O = triple-mode 10/20/30
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Byte-by-byte Description of file: cep.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- --- [OGLE-BLG-]
10- 16 A7 --- Star Star's ID (CEP-NNN) (G1)
18- 23 A6 --- Type Cepheid Type
25- 30 F6.3 mag <Imag> Intensity mean I-band magnitude
32- 37 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
40- 49 F10.7 d Per Period or longest period for double-mode
51- 59 F9.7 d e_Per Uncertainty of the longest period
62- 71 F10.5 d T0 Time of maximum brightness (HJD-2450000)
74- 78 F5.3 mag Iamp I-band amplitude (maximum-minimum)
81- 85 F5.3 --- R21 Fourier coefficient R_21
87- 91 F5.3 --- phi21 ?=- Fourier coefficient phi_21
94- 98 F5.3 --- R31 Fourier coefficient R_31
100-104 F5.3 --- phi31 ?=- Fourier coefficient phi_31
106-115 F10.7 d PerM ? Medium period for triple_mode
117-125 F9.7 d e_PerM ? Uncertainty of the medium period
128-137 F10.5 d T0M ? Time of maximum brightness (HJD-2450000)
140-144 F5.3 mag IampM ? I-band amplitude (maximum-minimum)
147-151 F5.3 --- R21M ? Fourier coefficient R21
153-157 F5.3 --- phi21M ?=- Fourier coefficient phi21
160-164 F5.3 --- R31M ? Fourier coefficient R31
166-170 F5.3 --- phi31M ?=- Fourier coefficient phi31
172-181 F10.7 d PerS ? Shortest period for double and
triple mode
183-191 F9.7 d e_PerS ? Uncertainty of the shortest period
194-203 F10.5 d T0S ? Time of maximum brightness (HJD-2450000)
206-210 F5.3 mag IampS ? I-band amplitude (maximum-minimum)
213-217 F5.3 --- R21S ? Fourier coefficient R21
219-223 F5.3 --- phi21S ?=- Fourier coefficient phi21
226-230 F5.3 --- R31S ? Fourier coefficient R31
232-236 F5.3 --- phi31S ?=- Fourier coefficient phi31
-------------------------------------------------------------------------------
Byte-by-byte Description of file: t2cep.dat acep.dat rrlyr.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- --- [OGLE-BLG- OGLE-GAL-]
10- 20 A11 --- Star Star's ID
(T2CEP-NNN, ACEP-NNN, RRLYR-NNNNN) (G1)
22- 29 A8 --- Type Type of Cepheids or subtype of RR Lyrae (1)
32- 37 F6.3 mag <Imag> Intensity mean I-band magnitude
39- 44 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
47- 57 F11.8 d Per First-overtone period
59- 68 F10.8 d e_Per Uncertainty of first-overtone period
71- 80 F10.5 d T0 Time of maximum brightness (HJD-2450000)
83- 87 F5.3 mag Iamp I-band amplitude (maximum-minimum)
90- 94 F5.3 --- R21 Fourier coefficient R_21
96-100 F5.3 --- phi21 ?=- Fourier coefficient phi21
103-107 F5.3 --- R31 Fourier coefficient R31
109-113 F5.3 --- phi31 ?=- Fourier coefficient phi31
116-125 F10.8 d Per.0 ? Fundamental-mode period
127-136 F10.8 d e_Per.0 ? Uncertainty of fundamental-mode period
139-148 F10.5 d T0.0 ? Time of maximum brightness (HJD-2450000)
151-155 F5.3 mag Iamp.0 ? I-band amplitude (maximum-minimum)
158-162 F5.3 --- R21.0 ? R21 Fourier coefficient R21
164-168 F5.3 --- phi21.0 ?=- phi21 Fourier coefficient phi21
171-175 F5.3 --- R31.0 ? R31 Fourier coefficient R31
177-181 F5.3 --- phi31.0 ?=- phi31 Fourier coefficient phi31
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Note (1): Mode as follows:
Type II = Type II Cepheid (t2cep.dat)
F = fundamental-mode anomalous Cepheid (acep.dat)
1O = first-overtone anomalous Cepheid (acep.dat)
RRab = RRab RR lyrae (rrlyr.dat)
RRc = RRc RR lyrae (rrlyr.dat)
RRd = RRd RR lyrae (rrlyr.dat)
aRRd = aRRd RR lyrae (rrlyr.dat)
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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- 9 A9 --- --- [OGLE-BLG- OGLE-GAL-]
10- 20 A11 --- Star Star's ID (G1)
22- 93 A72 --- Rem Remark
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Global notes:
Note (G1): Names as:
CEP-NNN for Cepheids (OGLE-BLG-CEP-NNN)
T2CEP-NNN for type II Cepheids (OGLE-BLG-T2CEP-NNN)
ACEP-NNN for anomalous Cepheids (OGLE-GAL-ACEP-NNN)
RRLYR-NNNNN for RR Lyrae (OGLE-BLG-RRLYR-NNNNN)
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History:
Copied at:
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/blg/cep/
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/blg/t2cep/
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/gal/acep/
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/blg/rrlyr/
(End) Patricia Vannier [CDS] 05-Sep-2018