======================================================================= The OGLE Collection of Variable Stars Type II Cepheids in the Large Magellanic Cloud I. Soszynski, A. Udalski, M. K. Szymanski, L. Wyrzykowski, K. Ulaczyk, R. Poleski, P. Pietrukowicz, S. Kozlowski, D. Skowron, J. Skowron, P. Mroz, K. Rybicki, and P. Iwanek ======================================================================= soszynsk@astrouw.edu.pl This directory contains the OGLE catalog type II Cepheids in the Large Magellanic Cloud. The directory structure is as follows: README - this file ident.dat - identification of stars t2cep.dat - parameters of type II 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 pap.pdf - PDF version of the paper Soszynski et al. (2018), Acta Astron. 68, 89, (arXiv:1807.00008) describing the collection. Format of the file ident.dat: -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 18 A18 --- Star's ID 21- 25 A5 --- Subtype of type II Cepheids 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 (from GCVS) -------------------------------------------------------------------------- Format of the file t2cep.dat: -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 18 A18 --- Star's ID 21- 26 F6.3 mag Intensity mean I-band magnitude 28- 33 F6.3 mag Intensity mean V-band magnitude 36- 45 F10.7 days Period 47- 55 F9.7 days Uncertainty of period 58- 67 F10.5 days Time of maximum brightness (HJD-2450000) 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 -------------------------------------------------------------------------- Format of the files with photometry (phot/I/OGLE-LMC-T2CEP-NNN.dat, phot/V/OGLE-LMC-T2CEP-NNN.dat) -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 10 F10.5 days Heliocentric Julian Day - 2450000 12- 17 F6.3 mag Magnitude 19- 23 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 type II Cepheids in the Magellanic Clouds should include the appropriate reference(s) to OGLE paper(s). Updates: 2019-02-07 The collection extended with two first-overtone BL Her stars OGLE-LMC-T2CEP-290 and OGLE-LMC-T2CEP-291. For details see Soszynski et al. (2019). 2019-07-04 The collection extended with three type II Cepheids from OGLE-LMC-T2CEP-292 to OGLE-LMC-T2CEP-294 detected in the OGLE-IV outer fields. For details see: Soszynski et al. (2019), Acta Astron. 69, 87 (arXiv:1907.02073). 2022-08-20 1 additional type II Cepheid from the Gaia DR3 catalog (OGLE-LMC-T2CEP-295)