J/AcA/68/315 OGLE Galactic Cepheids (Udalski+, 2018)
OGLE Collection of Galactic Cepheids.
Udalski A., Soszynski I., Pietrukowicz P., Szymanski M.K., Skowron D.M.,
Skowron J., Mroz P., Poleski R., Kozlowski S., Ulaczyk K., Rybicki K.,
Iwanek P., Wrona M.
<Acta Astron., 68, 315-339 (2018)>
=2018AcA....68..315U 2018AcA....68..315U (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Stars, variable ; Photometry
Keywords: stars: variables: Cepheids - stars: oscillations - Galaxy: center -
Galaxy: disk - catalogs
Abstract:
We present here a new major part of the OGLE Collection of Variable
Stars - OGLE Collection of Galactic Cepheids. The new dataset was
extracted from the Galaxy Variability Survey images - a dedicated
large-scale survey of the Galactic disk and outer bulge conducted by
the OGLE project since 2013.
The OGLE collection contains 2721 Cepheids of all types - classical,
type II and anomalous. It more than doubles the number of known
Galactic classical Cepheids. Due to the long-term monitoring and large
number of epochs the selected sample is very pure, generally free from
contaminating stars of other types often mimicking Cepheids. Its
completeness is high at 90% level for classical Cepheids - tested
using recent samples of Galactic Cepheids: ASAS-SN, ATLAS, Gaia DR2
and Wise catalog of variable stars. Our comparisons indicate that the
completeness of the two latter datasets, Gaia DR2 andWise catalog, is
very low, at <10% level in the magnitude range of the OGLE GVS survey
(10.8<I<19.5mag). Both these samples are severely contaminated by
non-Cepheids (the purity is 67% and 56%, respectively).
We also present several interesting objects found in the new OGLE
Collection - multi-mode pulsators, first Galactic candidates for
eclipsing systems containing Cepheid, a binary Cepheid candidate.
New OGLE Collection of Galactic Cepheids is available for the
astronomical community from the OGLE Internet Archive in similar form
as previous parts of the OGLE Collection of Variable Stars.
Description:
OGLE 4 Galactic Cepheids.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
ident.dat 124 2807 Identification of stars
t2cep.dat 105 1238 Parameters of type II Cepheids
(bulge and Galactic disk fields)
acep.dat 105 55 Parameters of fundamental-mode (F) and
first-overtone (1O) anomalous Cepheids
cep.dat 105 1400 Parameters of fundamental-mode (F) and
first-overtone (1O) Cepheids
(bulge and Galactic disk fields)
cep2.dat 171 107 Parameters of double-mode F/1O and 1O/2O
Cepheids (bulge and Galactic disk fields)
cep3.dat 241 7 parameters of triple-mode 1O/2O/3O and F/1O/2O
Cepheids (bulge and Galactic disk fields)
remarks.dat 98 75 Individual remarks
--------------------------------------------------------------------------------
Byte-by-byte Description of file: ident.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Star Star's ID
21- 28 A8 --- Type Subtype or pulsation mode (G1)
31- 32 I2 h RAh Right ascension, equinox J2000.0
34- 35 I2 min RAm Right ascension, equinox J2000.0
37- 41 F5.2 s RAs Right ascension, equinox J2000.0
43 A1 --- DE- Declination sign, equinox J2000.0
44- 45 I2 deg DEd Declination, equinox J2000.0
47- 48 I2 arcmin DEm Declination, equinox J2000.0
50- 53 F4.1 arcsec DEs Declination, equinox J2000.0
56- 71 A16 --- OGLE4 OGLE-IV ID
73- 87 A15 --- OGLE3 OGLE-III ID
89-103 A15 --- OGLE2 OGLE-II ID
105-124 A20 --- OName Other designation (from VSX)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: t2cep.dat acep.dat cep.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Star Star's ID
20- 24 A5 --- Type Pulsation mode (G1)
26- 31 F6.3 mag <Imag> Intensity mean I-band magnitude
33- 38 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
41- 50 F10.7 d Per Period
52- 60 F9.7 d e_Per Uncertainty of period
63- 72 F10.5 d HJD Time of maximum brightness (HJD-2450000)
75- 79 F5.3 mag T0 I-band amplitude (maximum-minimum)
82- 86 F5.3 --- R21 Fourier coefficient R_21
88- 92 F5.3 --- phi21 ?=- Fourier coefficient phi_21
95- 99 F5.3 --- R31 Fourier coefficient R_31
101-105 F5.3 --- phi31 ?=- Fourier coefficient phi_31
--------------------------------------------------------------------------------
Byte-by-byte Description of file: cep2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- Star Star's ID
20- 24 A5 --- Mode Pulsation mode (G1)
26- 31 F6.3 mag <Imag> Intensity mean I-band magnitude
33- 38 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
41- 50 F10.7 d Per Longer period
52- 60 F9.7 d e_Per Uncertainty of the longer period
63- 72 F10.5 d T0 Time of maximum brightness (HJD-2450000)
75- 79 F5.3 mag Iamp I-band amplitude (maximum-minimum)
82- 86 F5.3 --- R21 Fourier coefficient R_21
88- 92 F5.3 --- phi21 ?=- Fourier coefficient phi_21
95- 99 F5.3 --- R31 Fourier coefficient R_31
101-105 F5.3 --- phi31 ?=- Fourier coefficient phi_31
107-116 F10.7 d PerS Shorter period
118-126 F9.7 d e_PerS Uncertainty of the shorter period
129-138 F10.5 d T0S Time of maximum brightness (HJD-2450000)
141-145 F5.3 mag IampS I-band amplitude (maximum-minimum)
148-152 F5.3 --- R21S Fourier coefficient R_21
154-158 F5.3 --- phi21S ?=- Fourier coefficient phi_21
161-165 F5.3 --- R31S Fourier coefficient R_31
167-171 F5.3 --- phi31S ?=- Fourier coefficient phi_31
--------------------------------------------------------------------------------
Byte-by-byte Description of file: cep3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- Star Star's ID
21- 28 A8 --- Mode Pulsation mode (G1)
30- 35 F6.3 mag <Imag> Intensity mean I-band magnitude
37- 42 F6.3 mag <Vmag> ?=- Intensity mean V-band magnitude
45- 54 F10.7 d Per Longest period
56- 64 F9.7 d e_Per Uncertainty of the longest period
67- 76 F10.5 d T0 Time of maximum brightness (HJD-2450000)
79- 83 F5.3 mag Iamp I-band amplitude (maximum-minimum)
86- 90 F5.3 --- R21 Fourier coefficient R_21
92- 96 F5.3 --- phi21 Fourier coefficient phi_21
99-103 F5.3 --- R31 Fourier coefficient R_31
105-109 F5.3 --- phi31 ?=- Fourier coefficient phi_31
111-120 F10.7 d PerM Medium period
122-130 F9.7 d e_PerM Uncertainty of the medium period
133-142 F10.5 d T0M Time of maximum brightness (HJD-2450000)
145-149 F5.3 mag IampM I-band amplitude (maximum-minimum)
152-156 F5.3 --- R21M Fourier coefficient R_21
158-162 F5.3 --- phi21M ?=- Fourier coefficient phi_21
165-169 F5.3 --- R31M Fourier coefficient R_31
171-175 F5.3 --- phi31M ?=- Fourier coefficient phi_31
177-186 F10.7 d PerS Shortest period
188-196 F9.7 d e_PerS Uncertainty of the shortest period
199-208 F10.5 d T0S Time of maximum brightness (HJD-2450000)
211-215 F5.3 mag IampS I-band amplitude (maximum-minimum)
218-222 F5.3 --- R21S Fourier coefficient R_21
224-228 F5.3 --- phi21s ?=- Fourier coefficient phi_21
231-235 F5.3 --- R31S Fourier coefficient R_31
237-241 F5.3 --- phi31S ?=- Fourier coefficient phi_31
--------------------------------------------------------------------------------
Byte-by-byte Description of file: remarks.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 A19 --- Star Star's ID
21- 98 A78 --- Rem Remark
--------------------------------------------------------------------------------
Global notes:
Note (G1): F=Fundamental, 1O=first overtone, 2O=second overtone,
3O=third overtone Subtype of type II Cepheids (BLHer, WVir, RVTau, pWVir)
--------------------------------------------------------------------------------
History:
Copied at
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/gd/cep
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/blg/cep
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/gd/t2cep
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/blg/t2cep
ftp://ftp.astrouw.edu.pl/ogle/ogle4/OCVS/gal/acep
(End) Patricia Vannier [CDS] 23-Sep-2019