======================================================================= 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: -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 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 # -------------------------------------------------------------------------- Format of files cepF.dat and cep1O.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 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 -------------------------------------------------------------------------- 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 -------------------------------------------------------------------------- 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 -------------------------------------------------------------------------- Format of the files with photometry (phot/I/OGLE-GD-CEP-NNNN.dat, phot/V/OGLE-GD-CEP-NNNN.dat) -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 13 F13.5 days Heliocentric Julian Day 15- 20 F6.3 mag Magnitude 22- 26 F5.3 mag Uncertainty of magnitude -------------------------------------------------------------------------- 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.