=======================================================================
               The OGLE Collection of Variable Stars
  Thirty Circumbinary Disk Occultation Systems (KH 15D-like stars)
                      from the OGLE Project

M. A. Urbanowicz, I. Soszynski, P. Pietrukowicz, A. Udalski, P. Mroz
  M. Wrona, M. Ratajczak, M. K. Szymanski J. Skowron, D. M. Skowron,
     R. Poleski, S. Kozlowski P. Iwanek, K. Ulaczyk, K. Rybicki,
                  M. Gromadzki, and M. Mroz

=======================================================================
murbanowicz@astrouw.edu.pl

This directory contains the OGLE catalog of Circumbinary Disk
Occultation Systems toward the Galactic bulge and disk.

The directory structure is as follows:

README            - this file

ident.dat         - identification of stars

cbo.dat           - parameters of circumbinary disk occultation systems

phot/I/           - I-band OGLE photometry of individual stars
phot/V/           - V-band OGLE photometry of individual stars
phot.tar.gz       - gzipped phot/ directory

fcharts/          - finding charts of individual stars

paper.pdf         - PDF version of the paper Urbanowicz et al. (2026),
                    Acta Astron. xx, xx, (arXiv:xxxx.xxxxx) describing
                    the collection.


Format of the file ident.dat:
--------------------------------------------------------------------------
 Bytes  Format Units   Description
--------------------------------------------------------------------------
  1- 12  A12   ---     Star's ID
 15- 16  I2    h       Right ascension, equinox J2000.0 (hours)
 18- 19  I2    m       Right ascension, equinox J2000.0 (minutes)
 21- 25  F5.2  s       Right ascension, equinox J2000.0 (seconds)
     27  A1    ---     Declination, equinox J2000.0 (sign)
 28- 29  I2    deg     Declination, equinox J2000.0 (degrees)
 31- 32  I2    arcmin  Declination, equinox J2000.0 (arc minutes)
 34- 37  F4.1  arcsec  Declination, equinox J2000.0 (arc seconds)
 40- 55  A16   ---     OGLE-IV ID
 58- 72  A15   ---     OGLE-III ID
 75- 89  A15   ---     OGLE-II ID
 92- 114 A23   ---     Other name
--------------------------------------------------------------------------

Format of the file cbo.dat:
--------------------------------------------------------------------------
 Bytes  Format Units   Description
--------------------------------------------------------------------------
  1- 12  A12   ---     Star's ID
 15- 21  F7.3  days    Orbital period
 24- 28  F5.2  mag     I-band magnitude at the maximum light
 31- 35  F5.2  mag     V-band magnitude at the maximum light
 38- 41  F4.2  mag     I-band amplitude (maximum-minimum)
 44- 47  F4.2  mag     Occultation duration to period ratio (minimal)
 49- 52  F4.2  mag     Occultation duration to period ratio (maximal)
 55- 65  F11.3 days    Epoch of of the primary eclipse (HJD)
--------------------------------------------------------------------------

Format of the files with photometry (OGLE-CBO-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. These 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 CBO stars in the Galactic bulge and disk should include the
appropriate reference(s) to OGLE paper(s).