Publications (35)
Real-time Flux Density Measurements of the 2011 Draconid Meteor Outburst
Sirko Molau, Geert Barentsen
During the 2011 outburst of the Draconid meteor shower, members of the Video Meteor Network of the International Meteor Organization (IMO) provided, for the first time, fully autom…
Planetary Candidates Observed by Kepler. VIII. A Fully Automated Catalog With Measured Completeness and Reliability Based on Data Release 25
Susan E. Thompson, Jeffrey L. Coughlin, Kelsey Hoffman +58
We present the Kepler Object of Interest (KOI) catalog of transiting exoplanets based on searching four years of Kepler time series photometry (Data Release 25, Q1-Q17). The catalo…
TESS photometry of extreme helium stars PV Tel and V821 Cen
C. Simon Jeffery, Geert Barentsen, Gerald Handler
PV Tel variables are extreme helium (EHe) stars known to be intrinsic light and velocity variable on characteristic timescales 0.1 - 2 d. With two exceptions, they are best describ…
The Occurrence of Rocky Habitable Zone Planets Around Solar-Like Stars from Kepler Data
Steve Bryson, Michelle Kunimoto, Ravi K. Kopparapu +79
We present occurrence rates for rocky planets in the habitable zones (HZ) of main-sequence dwarf stars based on the Kepler DR25 planet candidate catalog and Gaia-based stellar prop…
The Second Data Release of the INT Photometric H-Alpha Survey of the Northern Galactic Plane (IPHAS DR2)
Geert Barentsen, H. J. Farnhill, J. E. Drew +50
The INT/WFC Photometric H-Alpha Survey of the Northern Galactic Plane (IPHAS) is a 1800 square degrees imaging survey covering Galactic latitudes |b| < 5 deg and longitudes l = 30…
Discovery and Vetting of Exoplanets I: Benchmarking K2 Vetting Tools
Veselin B. Kostov, Susan E. Mullally, Elisa V. Quintana +7
We have adapted the algorithmic tools developed during the Kepler mission to vet the quality of transit-like signals for use on the K2 mission data. Using the four sets of publicly…
Kepler's Discoveries Will Continue: 21 Important Scientific Opportunities with Kepler & K2 Archive Data
Geert Barentsen, Christina Hedges, Nicholas Saunders +4
NASA's Kepler Space Telescope has collected high-precision, high-cadence time series photometry on 781,590 unique postage-stamp targets across 21 different fields of view. These ob…
A Large Ground-Based Observing Campaign of the Disintegrating Planet K2-22b
Knicole D. Colón, George Zhou, Avi Shporer +27
We present 45 ground-based photometric observations of the K2-22 system collected between December 2016 and May 2017, which we use to investigate the evolution of the transit of th…
The L 98-59 System: Three Transiting, Terrestrial-Sized Planets Orbiting a Nearby M-dwarf
Veselin B. Kostov, Joshua E. Schlieder, Thomas Barclay +112
We report the Transiting Exoplanet Survey Satellite (TESS) discovery of three terrestrial-sized planets transiting L 98-59 (TOI-175, TIC 307210830) -- a bright M dwarf at a distanc…
The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8
Daniel Huber, Stephen T. Bryson, Michael R. Haas +6
The K2 Mission uses the Kepler spacecraft to obtain high-precision photometry over ~80 day campaigns in the ecliptic plane. The Ecliptic Plane Input Catalog (EPIC) provides coordin…
Systematics-insensitive Periodogram for finding periods in TESS observations of long-period rotators
Christina Hedges, Ruth Angus, Geert Barentsen +3
NASA's TESS mission \citep{tess} has produced high precision photometry of millions of stars to the community. The majority of TESS observations have a duration of 27 days…
Four Small Planets Buried in K2 Systems: What Can We Learn for TESS?
Christina Hedges, Nicholas Saunders, Geert Barentsen +5
The Kepler, K2, and Transiting Exoplanet Survey Satellite (TESS) missions have provided a wealth of confirmed exoplanets, benefiting from a huge effort from the planet-hunting and…
Photometrically derived masses and radii of the planet and star in the TrES-2 system
Thomas Barclay, Daniel Huber, Jason F. Rowe +16
We measure the mass and radius of the star and planet in the TrES-2 system using 2.7 years of observations by the Kepler spacecraft. The light curve shows evidence for ellipsoidal…
Linearized Field Deblending: PSF Photometry for Impatient Astronomers
Christina Hedges, Rodrigo Luger, Jorge Martinez Palomera +2
NASA's Kepler, K2 and TESS missions employ Simple Aperture Photometry (SAP) to derive time-series photometry, where an aperture is estimated for each star, and pixels containing ea…
Estimating meteor rates using Bayesian inference
Geert Barentsen, Rainer Arlt, Hans-Erich Fröhlich
A method for estimating the true meteor rate λ from a small number of observed meteors n is derived. We employ Bayesian inference with a Poissonian likelihood function. We discuss…
A catalog of 29 open clusters and associations observed by the Kepler and K2 Missions
Ann Marie Cody, Geert Barentsen, Christina Hedges +5
Over the past nine years, the Kepler and K2 Missions have carried out high precision photometric monitoring of more than half a million stars. Among these targets are 29 clusters a…
A Discrete Set of Possible Transit Ephemerides for Two Long Period Gas Giants Orbiting HIP 41378
Juliette C. Becker, Andrew Vanderburg, Joseph E. Rodriguez +22
In 2015, K2 observations of the bright (V = 8.9, K = 7.7) star HIP 41378 revealed a rich system of at least five transiting exoplanets, ranging in size from super-Earths to gas gia…
A seven-planet resonant chain in TRAPPIST-1
Rodrigo Luger, Marko Sestovic, Ethan Kruse +30
The TRAPPIST-1 system is the first transiting planet system found orbiting an ultra-cool dwarf star. At least seven planets similar to Earth in radius and in mass were previously f…
K2-288Bb: A Small Temperate Planet in a Low-mass Binary System Discovered by Citizen Scientists
Adina D. Feinstein, Joshua E. Schlieder, John H. Livingston +23
Observations from the Kepler and K2 missions have provided the astronomical community with unprecedented amounts of data to search for transiting exoplanets and other astrophysical…
The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
The Astropy Collaboration, Adrian M. Price-Whelan, Pey Lian Lim +133
The Astropy Project supports and fosters the development of open-source and openly-developed Python packages that provide commonly needed functionality to the astronomical communit…
A catalog of stars observed simultaneously by Kepler and TESS
Thomas Barclay, Geert Barentsen
The Kepler spacecraft provided the first long-baseline, high-precision photometry for large numbers of stars. This enabled the discovery of thousands of new exoplanets, and the cha…
The Ionized Nebula surrounding the Red Supergiant W26 in Westerlund 1
Nicholas J. Wright, Roger Wesson, Janet E. Drew +7
We present Hαimages of an ionized nebula surrounding the M2-5Ia red supergiant (RSG) W26 in the massive star cluster Westerlund 1. The nebula consists of a circumstellar shell or…
The Venus ground-based image Active Archive: a database of amateur observations of Venus in ultraviolet and infrared light
Geert Barentsen, Detlef Koschny
The Venus ground-based image Active Archive is an online database designed to collect ground-based images of Venus in such a way that they are optimally useful for science. The Arc…
Bayesian inference of T Tauri star properties using multi-wavelength survey photometry
Geert Barentsen, Jorick S. Vink, Janet E. Drew +1
There are many pertinent open issues in the area of star and planet formation. Large statistical samples of young stars across star-forming regions are needed to trigger a breakthr…
K2-138 g: Spitzer Spots a Sixth Planet for the Citizen Science System
Kevin K. Hardegree-Ullman, Jessie L. Christiansen, David R. Ciardi +10
greatly extended 's ability to find new planets, but it was typically limited to identifying transiting planets with orbital periods below 40 days. While analyzing $K2…
Measurement of Source Star Colors with the K2C9-CFHT Multi-color Microlensing Survey
Weicheng Zang, Matthew T Penny, Wei Zhu +8
K2 Campaign 9 (K2C9) was the first space-based microlensing parallax survey capable of measuring microlensing parallaxes of free-floating planet candidate microlensing events. Simu…
Multicolor Variability of Young Stars in the Lagoon Nebula: Driving Causes and Intrinsic Timescales
Laura Venuti, Ann Marie Cody, Luisa M. Rebull +5
Space observatories have provided unprecedented depictions of the many variability behaviors typical of low-mass, young stars. However, those studies have so far largely omitted mo…
Multi-Wavelength Photometry Derived from Monochromatic Kepler Data
Christina Hedges, Rodrigo Luger, Jessie Dotson +2
The Kepler mission has provided a wealth of data, revealing new insights in time-domain astronomy. However, Kepler's single band-pass has limited studies to a single wavelength. In…
K2SUPERSTAMP: The release of calibrated mosaics for the {\em Kepler/K2} Mission
Ann Marie Cody, Geert Barentsen, Christina Hedges +2
We describe the release of a new High Level Science Product (HLSP) available at the MAST archive. The HLSP, called K2Superstamp, consists of a series of FITS images for four open s…
Kepler Bonus: Aperture Photometry Light Curves of EXBA Sources
Jorge Martinez-Palomera, Christina Hedges, Joseph Rodriguez +2
NASA's Kepler mission observed background regions across its field of view for more than three consecutive years using custom designed super apertures (EXBA masks). Since these ape…
The K2-138 System: A Near-Resonant Chain of Five Sub-Neptune Planets Discovered by Citizen Scientists
Jessie L. Christiansen, Ian J. M. Crossfield, Geert Barentsen +25
K2-138 is a moderately bright (V = 12.2, K = 10.3) main sequence K-star observed in Campaign 12 of the NASA K2 mission. It hosts five small (1.6-3.3R_Earth) transiting planets in a…
SN 2018agk: A Prototypical Type Ia Supernova with a Smooth Power-law Rise in Kepler (K2)
Qinan Wang, Armin Rest, Yossef Zenati +73
We present the 30-min cadence Kepler/K2 light curve of the Type Ia supernova (SN Ia) SN 2018agk, covering approximately one week before explosion, the full rise phase and the decli…
The K2 and TESS Synergy. I. Updated Ephemerides and Parameters for K2-114, K2-167, K2-237, and K2-261
Mma Ikwut-Ukwa, Joseph E. Rodriguez, Allyson Bieryla +30
Although the Transiting Exoplanet Survey Satellite (TESS) primary mission observed the northern and southern ecliptic hemispheres, generally avoiding the ecliptic, and the Kepler s…
Catalog of New K2 Exoplanet Candidates from Citizen Scientists
Jon K. Zink, Kevin K. Hardegree-Ullman, Jessie L. Christiansen +34
We provide 28 new planet candidates that have been vetted by citizen scientists and expert astronomers. This catalog contains 9 likely rocky candidates () and…
T Tauri candidates and accretion rates using IPHAS: method and application to IC1396
Geert Barentsen, Jorick S. Vink, J. E. Drew +6
The INT Photometric H-Alpha Survey (IPHAS) is a 1800 deg^2 survey of the Northern Galactic Plane, reaching down to r'~21. We demonstrate how the survey can be used to (1) reliably…