======================================================================= The OGLE Collection of Variable Stars Anomalous Cepheids in the Milky Way I. Soszynski, A. Udalski, M. K. Szymanski, L. Wyrzykowski, K. Ulaczyk, R. Poleski, P. Pietrukowicz, S. Kozlowski, D. M. Skowron, J. Skowron, P. Mroz, and M. Pawlak ======================================================================= soszynsk@astrouw.edu.pl This directory contains the OGLE collection of anomalous Cepheids in the Milky Way. The directory structure is as follows: README - this file ident.dat - identification of stars acepF.dat - parameters of fundamental-mode anomalous Cepheids acep1O.dat - parameters of first-overtone anomalous 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 gc.dat - candidates for objects located in globular clusters pap1.pdf - PDF version of the paper Soszynski et al. (2017), Acta Astron. 67, 103, (arXiv:1706.09452) describing anomalous Cepheids in front of the Magellanic Clouds. pap2.pdf - PDF version of the paper Soszynski et al. (2017), Acta Astron. 67, 297, (arXiv:1712.01307) describing anomalous Cepheids in the Galactic bulge. pap3.pdf - PDF version of the paper Udalski et al. (2018), Acta Astron. 68, 315, (arXiv:1810.09489) describing the extension of the collection to the Galactic disk and outer Galactic bulge fields. pap4.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- 17 A17 --- Star's ID 19- 21 A3 --- Mode of pulsations (F, 1O, MUL) 24- 25 I2 h Right ascension, equinox J2000.0 (hours) 27- 28 I2 m Right ascension, equinox J2000.0 (minutes) 30- 34 F5.2 s Right ascension, equinox J2000.0 (seconds) 36 A1 --- Declination, equinox J2000.0 (sign) 37- 38 I2 deg Declination, equinox J2000.0 (degrees) 40- 41 I2 arcmin Declination, equinox J2000.0 (arc minutes) 43- 46 F4.1 arcsec Declination, equinox J2000.0 (arc seconds) 49- 64 A16 --- OGLE-IV ID 66- 80 A15 --- OGLE-III ID 82- 96 A15 --- OGLE-II ID 98- A --- Other designation (from VSX) -------------------------------------------------------------------------- Format of the files acepF.dat and acep1O.dat: -------------------------------------------------------------------------- Bytes Format Units Description -------------------------------------------------------------------------- 1- 17 A17 --- Star's ID 20- 25 F6.3 mag Intensity mean I-band magnitude 27- 32 F6.3 mag Intensity mean V-band magnitude 35- 44 F10.7 days Period 46- 54 F9.7 days Uncertainty of period 57- 68 F12.4 days Time of maximum brightness (HJD) 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 with photometry (phot/I/OGLE-GAL-ACEP-NNN.dat, phot/V/OGLE-GAL-ACEP-NNN.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 anomalous Cepheids in the Milky Way should include the appropriate reference(s) to OGLE paper(s). Updates: 2020-07-16 65 additional anomalous Cepheids (from OGLE-GAL-ACEP-056 to OGLE-GAL-ACEP-120; Soszynski et al. 2020, Acta Astron. 70, 101) 2022-08-20 1 additional anomalous Cepheid from the Gaia DR3 catalog (OGLE-GAL-ACEP-121) 2024-03-26 - Update of the OGLE-IV light curves with new data points collected until February 2024. - Re-reduced OGLE-IV photometry in some fields within the Galactic bulge. - The observation epochs are now provided in the format of full Heliocentric Julian Days. - OGLE-GAL-ACEP-051 has been reclassified as a spotted variable star and removed from the Collection.