======================================================================= The OGLE Collection of Variable Stars Delta Scuti Stars in the Small Magellanic Cloud I. Soszynski, A. Udalski, J. Skowron, P. Pietrukowicz, M.K. Szymanski, R. Poleski, D.M. Skowron, S. Kozlowski, P. Mroz, P. Iwanek, M. Wrona, K. Ulaczyk, K. Rybicki, and M. Gromadzki ======================================================================= soszynsk@astrouw.edu.pl This directory contains the OGLE collection of delta Scuti-type stars in the fields toward the Small Magellanic Cloud. The directory structure is as follows: README - this file ident.dat - identification of stars dsct.dat - parameters of delta Scuti stars remarks.txt - remarks on selected objects 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 stars paper.pdf - PDF version of the paper Soszynski et al. (2022), Acta Astron. 72, 245, (arXiv:2301.04663) describing the collection Format of the file ident.dat: -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 18 A18 --- Star's ID 21- 30 A10 --- Type (singlemode, multimode) 33- 34 I2 h Right ascension, equinox J2000.0 (hours) 36- 37 I2 m Right ascension, equinox J2000.0 (minutes) 39- 43 F5.2 s Right ascension, equinox J2000.0 (seconds) 45 A1 --- Declination, equinox J2000.0 (sign) 46- 47 I2 deg Declination, equinox J2000.0 (degrees) 49- 50 I2 arcmin Declination, equinox J2000.0 (arc minutes) 52- 55 F4.1 arcsec Declination, equinox J2000.0 (arc seconds) 58- 73 A16 --- OGLE-IV ID 75- 89 A15 --- OGLE-III ID 91-106 A16 --- OGLE-II ID 108- A --- Other designation (from VSX) -------------------------------------------------------------------------- Format of the file dsct.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 F10.8 days Primary period 47- 56 F10.8 days Uncertainty of primary 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_31 104-113 F10.8 days Secondary period (if available) 115-124 F10.8 days Uncertainty of secondary period 127-136 F10.5 days Time of maximum brightness (HJD-2450000) 139-143 F5.3 mag I-band amplitude (maximum-minimum) 146-150 F5.3 --- Fourier coefficient R_21 152-156 F5.3 --- Fourier coefficient phi_21 159-163 F5.3 --- Fourier coefficient R_31 165-169 F5.3 --- Fourier coefficient phi_31 172-181 F10.8 days Tertiary period (if available) 183-192 F10.8 days Uncertainty of tertiary period 195-204 F10.5 days Time of maximum brightness (HJD-2450000) 207-211 F5.3 mag I-band amplitude (maximum-minimum) 214-218 F5.3 --- Fourier coefficient R_21 220-224 F5.3 --- Fourier coefficient phi_21 227-231 F5.3 --- Fourier coefficient R_31 233-237 F5.3 --- Fourier coefficient phi_31 -------------------------------------------------------------------------- Format of the photometry files (OGLE-SMC-DSCT-NNNN.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-SMC-DSCT-NNNN.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 collection of delta Scuti-type stars should include the appropriate reference(s) to OGLE paper(s).