Index of /ogle/ogle4/OCVS/gd/cep
=======================================================================
OGLE Collection of Galactic Cepheids
A. Udalski, I. Soszynski, P. Pietrukowicz, M.K. Szymanski,
D.M. Skowron, J. Skowron, P. Mroz, R. Poleski, S. Kozlowski,
K. Ulaczyk, K. Rybicki, P. Iwanek and M. Wrona
=======================================================================
udalski@astrouw.edu.pl
This directory contains the OGLE catalog classical Cepheids in the
Galactic disk (Udalski et al. 2018, with further updates - see below)
The directory structure is as follows:
README - this file
ident.dat - identification of stars
cepF.dat - parameters of fundamental-mode (F) Cepheids
cep1O.dat - parameters of first-overtone (1O) Cepheids
cepF1O.dat - parameters of double-mode F/1O Cepheids
cep1O2O.dat - parameters of double-mode 1O/2O Cepheids
cepF1O2O.dat - parameters of a triple-mode F/1O/2O Cepheid
cep1O2O3O.dat - parameters of triple-mode 1O/2O/3O Cepheids
phot/I/ - I-band photometry of individual objects
phot/V/ - V-band photometry of individual objects
phot.tar.gz - gzipped phot/ directory
fcharts/ - finding charts of individual objects
remarks.txt - remarks on selected objects
pap1.pdf - PDF version of the paper Udalski et al. (2018),
Acta Astron. 68, 315, (arXiv:1810.09489) describing the
catalog.
pap2.pdf - PDF version of the paper Soszynski et al. (2020),
Acta Astron. 70, 101 (arXiv:2007.07255), describing
the extension of the collection.
Format of the file ident.dat:
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Bytes Format Units Description
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1- 16 A16 --- Star's ID
18- 25 A8 --- Mode(s) of pulsation
28- 29 I2 h Right ascension, equinox J2000.0 (hours)
31- 32 I2 m Right ascension, equinox J2000.0 (minutes)
34- 38 F5.2 s Right ascension, equinox J2000.0 (seconds)
40 A1 --- Declination, equinox J2000.0 (sign)
41- 42 I2 deg Declination, equinox J2000.0 (degrees)
44- 45 I2 arcmin Declination, equinox J2000.0 (arc minutes)
47- 50 F4.1 arcsec Declination, equinox J2000.0 (arc seconds)
53- 68 A16 --- OGLE-IV ID
70- 84 A15 --- OGLE-III ID
86-100 A15 --- OGLE-II ID
102- A --- Other designation
# Full cross-identification with other catalogs of Cepheids can be found
# here:
#
# http://www.astrouw.edu.pl/ogle/ogle4/OCVS/allGalCep.listID
#
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Format of files cepF.dat and cep1O.dat:
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Bytes Format Units Description
--------------------------------------------------------------------------
1- 16 A16 --- Star's ID
19- 24 F6.3 mag Intensity mean I-band magnitude
26- 31 F6.3 mag Intensity mean V-band magnitude
33- 43 F11.7 days Period
45- 53 F9.7 days Uncertainty of period
56- 66 F12.4 days Time of maximum brightness (HJD)
70- 74 F5.3 mag I-band amplitude (maximum-minimum)
77- 81 F5.3 --- Fourier coefficient R_21
83- 87 F5.3 --- Fourier coefficient phi_21
89- 94 F5.3 --- Fourier coefficient R_31
96-100 F5.3 --- Fourier coefficient phi_31
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Format of files cepF1O.dat, cep1O2O.dat, and cep2O3O.dat:
--------------------------------------------------------------------------
Bytes Format Units Description
--------------------------------------------------------------------------
1- 16 A16 --- Star's ID
19- 24 F6.3 mag Intensity mean I-band magnitude
26- 31 F6.3 mag Intensity mean V-band magnitude
33- 43 F11.7 days Longer period
45- 53 F9.7 days Uncertainty of the longer period
56- 67 F12.4 days Time of maximum brightness (HJD)
70- 74 F5.3 mag I-band amplitude (maximum-minimum)
77- 81 F5.3 --- Fourier coefficient R_21
83- 87 F5.3 --- Fourier coefficient phi_21
90- 94 F5.3 --- Fourier coefficient R_31
96-100 F5.3 --- Fourier coefficient phi_31
102-111 F10.7 days Shorter period
113-121 F9.7 days Uncertainty of the shorter period
124-135 F10.5 days Time of maximum brightness (HJD)
138-142 F5.3 mag I-band amplitude (maximum-minimum)
145-149 F5.3 --- Fourier coefficient R_21
151-155 F5.3 --- Fourier coefficient phi_21
158-162 F5.3 --- Fourier coefficient R_31
164-168 F5.3 --- Fourier coefficient phi_31
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Format of files cepF1O2O.dat and cep1O2O3O.dat:
--------------------------------------------------------------------------
Bytes Format Units Description
--------------------------------------------------------------------------
1- 16 A16 --- Star's ID
19- 24 F6.3 mag Intensity mean I-band magnitude
26- 31 F6.3 mag Intensity mean V-band magnitude
33- 43 F11.7 days Longest period
45- 53 F9.7 days Uncertainty of the longest period
56- 67 F12.4 days Time of maximum brightness (HJD)
70- 74 F5.3 mag I-band amplitude (maximum-minimum)
77- 81 F5.3 --- Fourier coefficient R_21
83- 87 F5.3 --- Fourier coefficient phi_21
90- 94 F5.3 --- Fourier coefficient R_31
96-100 F5.3 --- Fourier coefficient phi_31
102-111 F10.7 days Medium period
113-121 F9.7 days Uncertainty of the medium period
124-135 F10.5 days Time of maximum brightness (HJD)
138-142 F5.3 mag I-band amplitude (maximum-minimum)
145-149 F5.3 --- Fourier coefficient R_21
151-155 F5.3 --- Fourier coefficient phi_21
158-162 F5.3 --- Fourier coefficient R_31
164-168 F5.3 --- Fourier coefficient phi_31
170-179 F10.7 days Shortest period
181-189 F9.7 days Uncertainty of the shortest period
192-203 F10.5 days Time of maximum brightness (HJD)
206-210 F5.3 mag I-band amplitude (maximum-minimum)
213-217 F5.3 --- Fourier coefficient R_21
219-223 F5.3 --- Fourier coefficient phi_21
226-230 F5.3 --- Fourier coefficient R_31
232-236 F5.3 --- Fourier coefficient phi_31
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Format of the files with photometry (phot/I/OGLE-GD-CEP-NNNN.dat,
phot/V/OGLE-GD-CEP-NNNN.dat)
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Bytes Format Units Description
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1- 13 F13.5 days Heliocentric Julian Day
15- 20 F6.3 mag Magnitude
22- 26 F5.3 mag Uncertainty of magnitude
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Finding charts are gzipped Postscript images. The names of the files are in
the form: ID.ps.gz. The finding charts are 60"x60" subframes of the I-band
reference frames centered on the star. White cross marks the star. North is
up and East to the left.
Any presentation of the scientific analysis or usage of the data from the
catalog of classical Cepheids in the Galactic disk should include the
appropriate reference(s) to OGLE paper(s).
Updates:
2019-05-10 Classical Cepheids from the additional OGLE disk areas added:
(190 < l < 250; -7 < b < -4) and (250 < l < 345; 4 < b < 6)
2020-01-15 221 additional classical Cepheids from the northern Galactic
disk (from OGLE-GD-CEP-1361 to OGLE-GD-CEP-1583; Skowron et
al. 2019, Acta Astron. 69, 305)
2020-07-16 236 additional classical Cepheids (from OGLE-GD-CEP-1584 to
OGLE-GD-CEP-1819; Soszynski et al. 2020, Acta Astron. 70, 101)
2022-08-20 64 additional classical Cepheids from the Gaia DR3 catalog
(from OGLE-GD-CEP-1820 to OGLE-GD-CEP-1883)
2024-03-26 - OGLE-GD-CEP-1884 added - the longest-period classical Cepheid
in the Milky Way (Soszynski et al. 2024)
- Update of the OGLE-IV light curves with new data points
collected until February 2024.
- The observation epochs are now provided in the format of full
Heliocentric Julian Days.
- 14 stars have been reclassified as spotted variable stars and
removed from the Collection.
2024-10-25 - OGLE-GD-CEP-1375 reclassified as a spotted variable star and
removed from the Collection.
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