The Perkins INfrared Exosatellite Survey (PINES) I. Survey Overview, Reduction Pipeline, and Early Results

Abstract

We describe the Perkins INfrared Exosatellite Survey (PINES), a near-infrared photometric search for short-period transiting planets and moons around a sample of 393 spectroscopically confirmed L- and T-type dwarfs. PINES is performed with Boston University's 1.8 m Perkins Telescope Observatory, located on Anderson Mesa, Arizona. We discuss the observational strategy of the survey, which was designed to optimize the number of expected transit detections, and describe custom automated observing procedures for performing PINES observations. We detail the steps of the $\text{PINES Analysis Toolkit}$ ($\text{PAT}$), software that is used to create light curves from PINES images. We assess the impact of second-order extinction due to changing precipitable water vapor on our observations and find that the magnitude of this effect is minimized in Mauna Kea Observatories $\text{J}$-band. We demonstrate the validity of $\text{PAT}$ through the recovery of a transit of WASP-2 b and known variable brown dwarfs, and use it to identify a new variable L/T transition object: the T2 dwarf WISE J045746.08-020719.2. We report on the measured photometric precision of the survey and use it to estimate our transit detection sensitivity. We find that for our median brightness targets, assuming contributions from white noise only, we are sensitive to the detection of 2.5 $R_{\oplus }$ planets and larger. PINES will test whether the increase in sub-Neptune-sized planet occurrence with decreasing host mass continues into the L and T dwarf regime.

arXiv comment25 pages, 15 figures, accepted to AJ

References in corpus (86)

• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• On the variation of the Initial Mass Function
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• A Non-Gray Theory of Extrasolar Giant Planets and Brown Dwarfs
• Planet Occurrence within 0.25 AU of Solar-type Stars from Kepler
• batman: BAsic Transit Model cAlculatioN in Python
• Astrometry.net: Blind astrometric calibration of arbitrary astronomical images
• astroquery: An Astronomical Web-Querying Package in Python
• Giant Planet Occurrence in the Stellar Mass-Metallicity Plane
• A Giant Planet Candidate near a Young Brown Dwarf
• Temperate Earth-sized planets transiting a nearby ultracool dwarf star
• The Occurrence Rate of Small Planets around Small Stars
• Probabilistic Forecasting of the Masses and Radii of Other Worlds
• The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition
• BANYAN. XI. The BANYAN $\Sigma$ multivariate Bayesian algorithm to identify members of young associations within 150 pc
• A Unified Near Infrared Spectral Classification Scheme for T Dwarfs
• The 3.6-8.0 Micron Broadband Emission Spectrum of HD 209458b: Evidence for an Atmospheric Temperature Inversion
• Preliminary Parallaxes of 40 L and T Dwarfs from the U.S. Naval Observatory Infrared Astrometry Program
• Design Considerations for a Ground-based Transit Search for Habitable Planets Orbiting M dwarfs
• The Mauna Kea Observatories Near-Infrared Filter Set. II. Specifications for a New JHKL'M' Filter Set for Infrared Astronomy
• Assessing statistical significance of periodogram peaks
• Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function
• A stellar-mass-dependent drop in planet occurrence rates
• WASP-1b and WASP-2b: Two new transiting exoplanets detected with SuperWASP and SOPHIE
• The Stellar Population of the Chamaeleon I Star-Forming Region
• Weather on Other Worlds. II. Survey Results: Spots Are Ubiquitous on L and T Dwarfs
• Population Properties of Brown Dwarf Analogs to Exoplanets
• Photometric Variability of the T2.5 Brown Dwarf SIMP J013656.5+093347; Evidence for Evolving Weather Patterns
• Giant Planet Companion to 2MASSW J1207334-393254
• The Mauna Kea Observatories Near-Infrared Filter Set. I: Defining Optimal 1-5 $\mu$m Bandpasses
• Large Amplitude Variations of an L/T Transition Brown Dwarf: Multi-Wavelength Observations of Patchy, High-Contrast Cloud Features
• Exploring brown dwarf disks: A 1.3 mm survey in Taurus
• Strong Brightness Variations Signal Cloudy-to-Clear Transition of Brown Dwarfs
• The NIRSPEC Ultracool Dwarf Radial Velocity Survey
• Kepler Planet Occurrence Rates for Mid-Type M Dwarfs as a Function of Spectral Type
• The Kepler Dichotomy among the M Dwarfs: Half of Systems Contain Five or More Coplanar Planets
• Binarity of Transit Host Stars - Implications on Planetary Parameters
• The Wide Brown Dwarf Binary Oph 1622-2405 and Discovery of A Wide, Low Mass Binary in Ophiuchus (Oph 1623-2402): A New Class of Young Evaporating Wide Binaries?
• Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime
• First Detection of Millimeter Dust Emission from Brown Dwarf Disks
• Kepler-445, Kepler-446 and the Occurrence of Compact Multiples Orbiting Mid-M Dwarf Stars
• The potential for Earth-mass planet formation around brown dwarfs
• SPECULOOS -- Ultracool Dwarf Transit Survey: Target List and Strategy
• Fast-evolving weather for the coolest of our two new substellar neighbours
• Discovery of a wide companion near the deuterium burning mass limit in the Upper Scorpius association
• The Disk Fractions of Brown Dwarfs in IC 348 and Chamaeleon I
• Discovery of a Wide Binary Brown Dwarf Born in Isolation
• Stellar parameters for TRAPPIST-1
• The Photometry of Undersampled Point Spread Functions
• The Brown dwarf Atmosphere Monitoring (BAM) Project I: The largest near-IR monitoring survey of L- & T-dwarfs
• Microlensing Discovery of a Tight, Low Mass-ratio Planetary-mass Object around an Old, Field Brown Dwarf
• The Hawaii Infrared Parallax Program. IV. A Comprehensive Parallax Survey of L0-T8 dwarfs with UKIRT
• Why do M dwarfs have more transiting planets?
• Dust masses of disks around 8 Brown Dwarfs and Very Low-Mass Stars in Upper Sco OB1 and Ophiuchus
• Spitzer Variability Properties of Low-Gravity L Dwarfs
• Astrometric orbit of a low-mass companion to an ultracool dwarf
• Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-Cool Dwarfs
• OGLE-2017-BLG-1522: A giant planet around a brown dwarf located in the Galactic bulge
• Diverse outcomes of planet formation and composition around low-mass stars and brown dwarfs
• Near Infrared Monitoring of Ultracool Dwarfs: Prospects for Searching for Transiting Companions
• A Search for Variability in Exoplanet Analogues and Low-Gravity Brown Dwarfs
• Spectral Classification and Effective Temperatures of L and T Dwarfs Based of Near-Infrared Spectra
• Limits on the infrared photometric monitoring of brown dwarfs
• First limits on the occurrence rate of short-period planets orbiting brown dwarfs
• A Herschel Search For Cold Dust in Brown Dwarf Disks: First Results
• Four new T dwarfs identified in PanSTARRS 1 commissioning data
• Photometry and Performance of SPECULOOS-South
• The large-scale disk fraction of brown dwarfs in the Taurus cloud as measured with Spitzer
• An overlooked brown dwarf neighbour (T7.5 at d~5pc) of the Sun and two additional T dwarfs at about 10pc
• A wide planetary-mass companion to a young low-mass brown dwarf in Ophiuchus
• A homogeneous analysis of disks around brown dwarfs
• The occurrence rate of exoplanets orbiting ultracool dwarfs as probed by K2
• Near real-time precipitable water vapour monitoring for correcting near-infrared observations using satellite remote sensing
• Monitoring Telluric Absorption with CAMAL
• Upper Limits on Planet Occurrence around Ultracool Dwarfs with K2
• KMT-2016-BLG-1820 and KMT-2016-BLG-2142: Two Microlensing Binaries Composed of Planetary-mass Companions and Very-Low-Mass Primaries
• Modeling the Protoplanetary Disks of Two Brown Dwarfs in the Taurus Molecular Cloud
• Design Considerations for a Ground-Based Search for Transiting Planets around L and T Dwarfs
• The disk around the brown dwarf KPNO Tau 3