672 citations · 9.2k across the 155 of their papers we have counts for
8 papers · 1 filter
A Fast Template Periodogram for Detecting Non-sinusoidal Fixed-shape Signals in Irregularly Sampled Time Series
John Hoffman, Jacob Vanderplas, Joel Hartman +1
Astrophysical time series often contain periodic signals. The large and growing volume of time series data from photometric surveys demands computationally efficient methods for de…
LcTools: A Windows-Based Software System for Finding and Recording Signals in Lightcurves from NASA Space Missions
Allan R. Schmitt, Joel D. Hartman, David M. Kipping
Since 2009, the Kepler, K2, and TESS missions have produced a vast number of lightcurves for public use. To assist citizen scientists in processing those lightcurves, the LcTools s…
Image Subtraction Reduction of Open Clusters M35 & NGC 2158 In The K2 Campaign-0 Super-Stamp
M. Soares-Furtado, J. D. Hartman, G. A. Bakos +3
Observations were made of the open clusters M35 and NGC 2158 during the initial K2 campaign (C0). Reducing these data to high-precision photometric time-series is challenging due t…
ZASPE: A Code to Measure Stellar Atmospheric Parameters and their Covariance from Spectra
Rafael Brahm, Andres Jordan, Joel Hartman +1
We describe the Zonal Atmospheric Stellar Parameters Estimator (ZASPE), a new algorithm, and its associated code, for determining precise stellar atmospheric parameters and their u…
VARTOOLS: A Program for Analyzing Astronomical Time-Series Data
Joel D. Hartman, Gáspár Á Bakos
This paper describes the VARTOOLS program, which is an open-source command-line utility, written in C, for analyzing astronomical time-series data, especially light curves. The pro…
Periodic transit and variability search with simultaneous systematics filtering: Is it worth it?
Geza Kovacs, Joel D. Hartman, Gaspar A. Bakos
By using subsets of the HATNet and K2 (Kepler two-wheel) Campaign 1 databases, we examine the effectiveness of filtering out systematics from photometric time series while simultan…