======================================================================= The OGLE Collection of Variable Stars RR Lyrae Stars 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, and M. Pawlak ======================================================================= soszynsk@astrouw.edu.pl This directory contains the OGLE catalog of RR Lyrae stars in the fields toward the Large Magellanic Cloud. The directory structure is as follows: README - this file ident.dat - identification of stars RRab.dat - parameters of RRab stars RRc.dat - parameters of RRc stars RRd.dat - parameters of RRd stars aRRd.dat - parameters of anomalous RRd stars phot/I/ - I-band OGLE-IV photometry of individual objects phot/V/ - V-band OGLE-IV photometry of individual objects phot.tar.gz - gzipped phot/ directory fcharts/ - finding charts of individual objects remarks.txt - remarks on selected objects paper.pdf - PDF version of the paper Soszynski et al. (2016), Acta Astron. 66, 131, (arXiv:1606.02727) describing the catalog. Format of the file ident.dat: -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 20 A20 --- Star's ID 23- 26 A4 --- Subtype of RR Lyr star (RRab, RRc, RRd, aRRd) 29- 30 I2 h Right ascension, equinox J2000.0 (hours) 32- 33 I2 m Right ascension, equinox J2000.0 (minutes) 35- 39 F5.2 s Right ascension, equinox J2000.0 (seconds) 41 A1 --- Declination, equinox J2000.0 (sign) 42- 43 I2 deg Declination, equinox J2000.0 (degrees) 45- 46 I2 arcmin Declination, equinox J2000.0 (arc minutes) 48- 51 F4.1 arcsec Declination, equinox J2000.0 (arc seconds) 54- 69 A16 --- OGLE-IV ID 71- 85 A15 --- OGLE-III ID 87-101 A15 --- OGLE-II ID 103- A --- Other designation (from GCVS and VSX) -------------------------------------------------------------------------- Format of the files RRab.dat and RRc.dat: -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 20 A20 --- Star's ID 23- 28 F6.3 mag Intensity mean I-band magnitude 30- 35 F6.3 mag Intensity mean V-band magnitude 38- 46 F9.7 days Period 48- 56 F9.7 days Uncertainty of period 59- 68 F10.5 days Time of maximum brightness (HJD-2450000) 71- 75 F5.3 mag I-band amplitude (maximum-minimum) 78- 82 F5.3 --- Fourier coefficient R_21 84- 88 F5.3 --- Fourier coefficient phi_21 91- 95 F5.3 --- Fourier coefficient R_31 97-101 F5.3 --- Fourier coefficient phi_31 -------------------------------------------------------------------------- Format of the files RRd.dat and aRRd.dat: -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 20 A20 --- Star's ID 23- 28 F6.3 mag Intensity mean I-band magnitude 30- 35 F6.3 mag Intensity mean V-band magnitude 38- 46 F9.7 days First-overtone period 48- 56 F9.7 days Uncertainty of first-overtone period 59- 68 F10.5 days Time of maximum brightness (HJD-2450000) 71- 75 F5.3 mag I-band amplitude (maximum-minimum) 78- 82 F5.3 --- Fourier coefficient R_21 84- 88 F5.3 --- Fourier coefficient phi_21 91- 95 F5.3 --- Fourier coefficient R_31 97-101 F5.3 --- Fourier coefficient phi_31 104-112 F9.7 days Fundamental-mode period 114-122 F9.7 days Uncertainty of fundamental-mode period 125-134 F10.5 days Time of maximum brightness (HJD-2450000) 137-140 F5.3 mag I-band amplitude (maximum-minimum) 144-148 F5.3 --- Fourier coefficient R_21 150-154 F5.3 --- Fourier coefficient phi_21 157-161 F5.3 --- Fourier coefficient R_31 163-167 F5.3 --- Fourier coefficient phi_31 -------------------------------------------------------------------------- Format of the files with photometry (phot/I/OGLE-LMC-RRLYR-NNNNN.dat, phot/V/OGLE-LMC-RRLYR-NNNNN.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: OGLE-LMC-RRLYR-NNNNN.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 RR Lyrae stars in the Galactic bulge should include the appropriate reference(s) to OGLE paper(s). Updates: 2017-06-30 The collection extended with objects from OGLE-LMC-RRLYR-39169 to OGLE-LMC-RRLYR-39959 detected in the OGLE-IV auxiliary photometric databases. Light curves of other objects supplemented with new observations. For details see: Soszynski et al. (2017), Acta Astron. 67, 103 (arXiv:1706.09452). 2018-06-04 Corrected erroneous calibration of the V-band photometry for 413 objects. 2018-07-12 Corrected erroneous calibration of the I-band photometry for 2584 objects. 2019-02-07 OGLE-LMC-RRLYR-35068 reclassified as a first-overtone type II Cepheid (OGLE-LMC-T2CEP-291). Removed from the list of RR Lyr stars. For details see Soszynski et al. (2019). 2019-07-04 The collection extended with 1246 RR Lyr stars from OGLE-LMC-RRLYR-39960 to OGLE-LMC-RRLYR-41205 detected in the OGLE-IV outer fields and discovered by the Gaia team. For details see: Soszynski et al. (2019), Acta Astron. 69, 87 (arXiv:1907.02073). 2022-08-20 156 additional RR Lyrae stars from the Gaia DR3 catalog (from OGLE-LMC-RRLYR-41206 to OGLE-LMC-RRLYR-41361) 2023-09-25 199 additional RR Lyrae stars (from OGLE-LMC-RRLYR-41362 to OGLE-LMC-RRLYR-41560)