tokens: Acknowledgments We thank Igor Soszynski for providing calibrated OGLE light curves of stars in our field. This work made use of python routines based on gatspy and astroML methods. This project was supported by DGAPA-UNAM grant through project IN106615. DMB acknowledges NPRP grant X-019-1-006 from the Qatar National Research Fund (a member of Qatar Foundation). This work makes use of observations from the LCOGT network. This work has made a large use of the SIMBAD and ADS services.
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