Extracting Microlensing Signals from K2 Campaign 9
arXiv:1704.08692 · doi:10.1088/1538-3873/aa7dd7
Abstract
The reduction of the \emph{K2}'s Campaign 9 (K2C9) microlensing data is challenging mostly because of the very crowded field and the unstable pointing of the spacecraft. In this work, we present the first method that can extract microlensing signals from this K2C9 data product. The raw light curves and the astrometric solutions are first derived, using the techniques from Soares-Furtado et al. and Huang et al. for \emph{K2} dense field photometry. We then minimize and remove the systematic effect by performing simultaneous modeling with the microlensing signal. We also derive precise vs. color-color relations that can predict the microlensing source flux in the \emph{Kepler} bandpass. By implementing the color-color relation in the light curve modeling, we show that the microlensing parameters can be better constrained. In the end, we use two example microlensing events, OGLE-2016-BLG-0980 and OGLE-2016-BLG-0940, to test our method.
arXiv comment11 pages, 8 figures and 2 tables; published on PASP
References in corpus (39)
- A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
- The K2 Mission: Characterization and Early results
- K-corrections and filter transformations in the ultraviolet, optical, and near infrared
- A method for optimal image subtraction
- The Fourth US Naval Observatory CCD Astrograph Catalog (UCAC4)
- Kepler Input Catalog: Photometric Calibration and Stellar Classification
- A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
- Reddening and Extinction Toward the Galactic Bulge from OGLE-III: The Inner Milky Way's Rv ~ 2.5 Extinction Curve
- Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
- Unbound or Distant Planetary Mass Population Detected by Gravitational Microlensing
- OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens
- The Exoplanet Mass-Ratio Function from the MOA-II Survey: Discovery of a Break and Likely Peak at a Neptune Mass
- A Natural Formalism for Microlensing
- Resolution of the MACHO-LMC-5 Puzzle: The Jerk-Parallax Microlens Degeneracy
- MOA-2011-BLG-293Lb: A test of pure survey microlensing planet detections
- The Mass Spectrum Of Machos From Parallax Measurements
- Planetary Detection Efficiency of the Magnification 3000 Microlensing Event OGLE-2004-BLG-343
- FITSH -- a software package for image processing
- Spitzer as Microlens Parallax Satellite: Mass Measurement for the OGLE-2014-BLG-0124L Planet and its Host Star
- First Space-Based Microlens Parallax Measurement: Spitzer Observations of OGLE-2005-SMC-001
- Microlensing with advanced contour integration algorithm: Green's theorem to third order, error control, optimal sampling and limb darkening
- Pathway to the Galactic Distribution of Planets: Combined Spitzer and Ground-Based Microlens Parallax Measurements of 21 Single-Lens Events
- Criteria for Sample Selection to Maximize Planet Sensitivity and Yield from Space-Based Microlens Parallax Surveys
- An Earth-mass Planet in a 1-AU Orbit around an Ultracool Dwarf
- Toward a Galactic Distribution of Planets. I. Methodology & Planet Sensitivities of the 2015 High-Cadence Spitzer Microlens Sample
- Kepler-like Multi-Plexing for Mass Production of Microlens Parallaxes
- First Space-based Microlens Parallax Measurement of an Isolated Star: Spitzer Observations of OGLE-2014-BLG-0939
- Predictions for Microlensing Planetary Events from Core Accretion Theory
- Campaign 9 of the Mission: Observational Parameters, Scientific Drivers, and Community Involvement for a Simultaneous Space- and Ground-based Microlensing Survey
- A PSF-based approach to Kepler/K2 data. I. Variability within the K2 Campaign 0 star clusters M 35 and NGC 2158
- High Precision Photometry for K2 Campaign 1
- Mass Measurements of Isolated Objects from Space-based Microlensing
- Spitzer as Microlens Parallax Satellite: Mass and Distance Measurements of Binary Lens System OGLE-2014-BLG-1050L
- Large size and slow rotation of the trans-Neptunian object (225088) 2007 OR10 discovered from Herschel and K2 observations
- OGLE-2015-BLG-1482L: the first isolated low-mass microlens in the Galactic bulge
- Spitzer Microlensing Program as a Probe for Globular Cluster Planets. Analysis of OGLE-2015-BLG-0448
- Empirical microlensing event rates predicted by a phenomenological model
- Image Subtraction Reduction of Open Clusters M35 & NGC 2158 In The K2 Campaign-0 Super-Stamp
- Predictions for the Detection and Characterization of a Population of Free-Floating Planets with K2 Campaign 9
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- Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey II: Free-Floating Planet Detection Rates
- A Neptune-mass Free-floating Planet Candidate Discovered by Microlensing Surveys
- Modeling microlensing events with MulensModel
- OGLE-2016-BLG-1190Lb: First Spitzer Bulge Planet Lies Near the Planet/Brown-Dwarf Boundary
- An Isolated Microlens Observed from K2, Spitzer and Earth
- Measurement of Source Star Colors with the K2C9-CFHT Multi-color Microlensing Survey
- The KMTNet/K2-C9 (Kepler) Data Release
- Main-belt asteroids in the K2 Uranus field
- Linearized Field Deblending: PSF Photometry for Impatient Astronomers
- Automated Extended Aperture Photometry of K2 variable stars
- Astrophysics with New Horizons: Making the Most of a Generational Opportunity
- Photometry of K2 Campaign 9 bulge data
- A Search for Variable Stars in the Globular Cluster M4 with K2
- A Catalog of Periodic Variables in Open Clusters M35 and NGC 2158
- A pixel-level model for event discovery in time-domain imaging
- Kepler K2 Campaign 9: I. Candidate short-duration events from the first space-based survey for planetary microlensing
- Pixel Level Decorrelation in Service of the \textit{Spitzer} Microlens Parallax Survey
- OGLE-2018-BLG-0799Lb: a Planet with Spitzer Parallax
- K2: Background Survey -- the search for undiscovered transients in Kepler/K2 data
- A Wide Orbit Exoplanet OGLE-2012-BLG-0838Lb
- Search for Exoplanetary Transits in the Galactic Bulge