Thirty Circumbinary Disk Occultation Systems (KH 15D-like Stars) from the OGLE Project

M.A. Urbanowicz, I. Soszyński, P. Pietrukowicz, A. Udalski, P. Mróz, M. Wrona, M. Ratajczak, M.K. Szymański, J. Skowron, D.M. Skowron, R. Poleski, S. Kozłowski, P. Iwanek, K. Ulaczyk, K.A. Rybicki, M. Gromadzki and M.J. Mróz
Acta Astronomica, Volume 76, Number 2, 83 (arXiv:2605.08470)

Data download: CBO

We present a catalog of 30 stars that are candidates for KH 15D-like binary systems, in which the observed brightness variations are caused by a circumbinary dusty disk that periodically obscures at least one of the stellar components as it moves along its orbit. Thanks to the regular observations conducted within the OGLE project, we provide unique light curves in the I and V bands with very long time baselines, in some cases beginning as early as 1997 and extending to the present day. Such long-term monitoring allows us to identify changes in eclipse widths, amplitudes, and light-curve shapes on timescales of many years. We highlight several circumbinary disk occultation (CBO) systems of particular interest and present spectra for three of them. Examples are shown below.

The underlying OGLE-IV photometry data are available to the astronomical community from the OGLE Internet Archive.

PLEASE cite the following paper when using the data or referring to these OGLE results:
Urbanowicz et al., 2025, Acta Astronomica, Volume 76, Number 2, 83 (arXiv:2605.08470)

Any comments about the data and the form of their presentation are welcome as they can improve the future releases of OGLE analysis. Send your messages to this address.

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