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        VVV Survey Microlensing : Catalog of Best and Forsaken Events

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        1907.04339v2.pdf (PDF, 4Mb)
        Author
        Navarro, Maria Gabriela
        Ramos, Rodrigo Contreras
        Minniti, Dante
        Pullen, Joyce
        Capuzzo-Dolcetta, Roberto
        Lucas, Philip W.
        Attention
        2299/23187
        Abstract
        We search for microlensing events in the zero-latitude area of the Galactic Bulge using the VVV Survey near-IR data. We have discovered a total sample of N = 630 events within an area covering 20.68 deg 2 between the years 2010 and 2015. In this paper, we describe the search and present the data for the final sample, including near-IR magnitudes, colors, and proper motions, as well as the standard microlensing parameters. We use the near-IR color-magnitude and color-color diagrams to select N RC = 290 events with red-clump sources to analyze the extinction properties of the sample in the central region of the Galactic plane. The timescale distribution and its dependence in the longitude axis is presented. The mean timescale decreases as we approach the Galactic minor axis (b = 0ˆ). Finally, we give examples of special microlensing events, such as binaries, short-timescale events, and events with a strong parallax effect.
        Publication date
        2020-04-10
        Published in
        The Astrophysical Journal
        Published version
        https://doi.org/10.3847/1538-4357/ab7a9d
        Other links
        http://hdl.handle.net/2299/23187
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