VVV Survey Microlensing: Catalog of Best and Forsaken Events

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 $20.68de{g}^2$ 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 Diagram 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 ($b=0$ deg). Finally, we give examples of special microlensing events, such as binaries, short timescale events, and events with strong parallax effect.

arXiv comment51 pages, 26 figures, 4 tables. Accepted - The Astrophysical Journal

References in corpus (47)

• Gaia Data Release 2. Summary of the contents and survey properties
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
• Possible Gravitational Microlensing of a Star in the Large Magellanic Cloud
• Real-Time Difference Imaging Analysis of MOA Galactic Bulge Observations During 2000
• VVV DR1: The First Data Release of the Milky Way Bulge and Southern Plane from the Near-Infrared ESO Public Survey VISTA Variables in the Via Lactea
• Gravitational Microlensing in the Local Group
• Predictions of the WFIRST Microlensing Survey I: Bound Planet Detection Rates
• Does the Milky Way have a Maximal Disk?
• Galactocentric Distance With the OGLE and Hipparcos Red Clump Stars
• First Observation of Parallax in a Gravitational Microlensing Event
• The MACHO Project First Year LMC Results: The Microlensing Rate and the Nature of the Galactic Dark Halo
• VIRAC: The VVV Infrared Astrometric Catalogue
• Korea Microlensing Telescope Network Microlensing Events from 2015: Event-Finding Algorithm, Vetting, and Photometry
• Hexadecapole Approximation in Planetary Microlensing
• Stellar density profile and mass of the Milky Way Bulge from VVV data
• The frequency of snowline-region planets from four-years of OGLE-MOA-Wise second-generation microlensing
• Binary Microlensing Events from the MACHO Project
• Microlensing Optical Depth towards the Galactic Bulge Using Clump Giants from the MACHO Survey
• Astrophysical Applications of Gravitational Microlensing
• Statistics Of Microlensing Optical Depth
• Microlensing optical depth toward the Galactic Bulge using bright sources from OGLE-II
• Extinction ratios in the inner Galaxy as revealed by the VVV survey
• The Microlensing Event Rate and Optical Depth Toward the Galactic Bulge from MOA-II
• OGLE-III Microlensing Events and the Structure of the Galactic Bulge
• Bulge Microlensing Optical Depth from EROS 2 observations
• K-Band Red Clump Distance to the Large Magellanic Cloud
• Milky Way demographics with the VVV survey. IV. PSF photometry from almost one billion stars in the Galactic bulge and adjacent southern disk
• MOA-II Galactic Microlensing Constraints: The Inner Milky Way has a Low Dark Matter Fraction and a Near Maximal Disk
• Second-generation microlensing planet surveys: a realistic simulation
• The MACHO Project: Microlensing Detection Efficiency
• Mass Determination With Gravitational Microlensing
• Modeling microlensing events with MulensModel
• Optical Depths and Timescale Distributions in Galactic Microlensing
• Discovery of RR Lyrae Stars in the Nuclear Bulge of the Milky Way
• The structure behind the Galactic bar traced by red clump stars in the VVV survey
• Mapping the stellar age of the Milky Way bulge with the VVV. I. The method
• Proper motions in the VVV Survey: Results for more than 15 million stars across NGC 6544
• Besançon Galactic model analysis of MOA-II microlensing: evidence for a mass deficit in the inner bulge
• High-precision astrometry with VVV. I. An independent reduction pipeline for VIRCAM@VISTA
• Estimating Finite Source Effects in Microlensing Events due to Free-Floating Planets with the Euclid Survey
• VVV Survey Microlensing Events in the Galactic Center Region
• VVV Survey Microlensing: the Galactic Longitude Dependence
• UKIRT-2017-BLG-001Lb: A giant planet detected through the dust
• Repeating microlensing events in the OGLE data
• Magellanic Cloud Gravitational Microlensing Results: What Do They Mean?
• VVV High proper motion stars I. The catalogue of bright Ks < 13.5 stars

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• The VISTA Variables in the Vía Láctea eXtended (VVVX) ESO public survey: Completion of the observations and legacy
• Gaia Data Release 3: Microlensing Events from All Over the Sky
• Prediction of Planet Yields by the PRime-focus Infrared Microlensing Experiment Microlensing Survey
• A microlensing search of 700 million VVV light curves
• The most variable VVV sources: eruptive protostars, dipping giants in the Nuclear Disc and others
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