SYSTEMATICS-INSENSITIVE PERIODIC SIGNAL SEARCH WITH K2

@article{Angus2015SYSTEMATICSINSENSITIVEPS,
  title={SYSTEMATICS-INSENSITIVE PERIODIC SIGNAL SEARCH WITH K2},
  author={Ruth Angus and Daniel Foreman-Mackey and John Asher Johnson},
  journal={The Astrophysical Journal},
  year={2015},
  volume={818}
}
From pulsating stars to transiting exoplanets, the search for periodic signals in K2 data, Kepler’s two-wheeled extension, is relevant to a long list of scientific goals. Systematics affecting K2 light curves due to the decreased spacecraft pointing precision inhibit the easy extraction of periodic signals from the data. We here develop a method for producing periodograms of K2 light curves that are insensitive to pointing-induced systematics; the Systematics-insensitive Periodogram (SIP… 

Periodic transit and variability search with simultaneous systematics filtering: Is it worth it?

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 simultaneously searching

Agatha: disentangling periodic signals from correlated noise in a periodogram framework

It is found that Agatha outperforms other periodograms in terms of removing correlated noise and assessing the significances of signals with more robust metrics and can be used to select the optimal noise model and to test the consistency of signals in time.

More planetary candidates from K2 Campaign 5 using TRAN_K2

  • G. Kovács
  • Geology, Physics
    Astronomy & Astrophysics
  • 2020
Tran_k2 a stand-alone Fortran code to search for planetary transits under the colored noise of stellar variability and instrumental effects, which detected 98% of the systems with all their candidate planets reported earlier by other authors, surveyed the whole field and discovered 15 new systems.

New planetary and eclipsing binary candidates from campaigns 1−6 of the K2 mission

Context. With only two functional reaction wheels, Kepler cannot maintain stable pointing at its original target field and has entered a new mode of observation called K2. Aims. We describe a new

Synergies between exoplanet surveys and variable star research

With the discovery of the first transiting extrasolar planetary system back in 1999, a great number of projects started to hunt for other similar systems. Because the incidence rate of such systems

Systematics-insensitive Periodogram for Finding Periods in TESS Observations of Long-period Rotators

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 $\approx$27 days, corresponding to

Are all RR Lyrae stars modulated?

We analyzed 151 variables previously classified as fundamental mode RR Lyrae stars from Campaigns 01–04 of the Kepler two-wheel (K2) archive. By employing a method based on the application of

Planetary Candidates from the First Year of the K2 Mission

The Kepler Space Telescope is currently searching for planets transiting stars along the ecliptic plane as part of its extended K2 mission. We processed the publicly released data from the first year

Big Signals, Small Signals, Systematics

We examine the role of instrumental systematics in the search for small amplitude signal components in the presence of large amplitude signals. Current analyses of variable stars dealing with the

THE K2 ECLIPTIC PLANE INPUT CATALOG (EPIC) AND STELLAR CLASSIFICATIONS OF 138,600 TARGETS IN CAMPAIGNS 1–8

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 coordinates, photometry,

References

SHOWING 1-10 OF 28 REFERENCES

Precise time series photometry for the Kepler-2.0 mission

The recently approved NASA K2 mission has the potential to multiply by an order of magnitude the number of short-period transiting planets found by Kepler around bright and low-mass stars, and to

A SYSTEMATIC SEARCH FOR TRANSITING PLANETS IN THE K2 DATA

This work applies a method for searching K2 light curves for evidence of exoplanets by simultaneously fitting for these systematics and the transit signals of interest, and presents posterior distributions on the properties of each system based strictly on the transit observables.

K2P2—A PHOTOMETRY PIPELINE FOR THE K2 MISSION

With the loss of a second reaction wheel, resulting in the inability to point continuously and stably at the same field of view, the NASA Kepler satellite recently entered a new mode of observation

STELLAR ROTATION PERIODS OF THE KEPLER OBJECTS OF INTEREST: A DEARTH OF CLOSE-IN PLANETS AROUND FAST ROTATORS

We present a large sample of stellar rotation periods for Kepler Objects of Interest, based on three years of public Kepler data. These were measured by detecting periodic photometric modulation

Measuring the rotation period distribution of field M dwarfs with Kepler

We have analysed 10 months of public data from the Kepler space mission to measure rotation periods of main-sequence stars with masses between 0.3 and 0.55 M_sun. To derive the rotational period we

K2 Variable Catalogue II: Variable Stars and Eclipsing Binaries in K2 Fields 1 and 0

We have created a catalogue of variable stars found from a search of the publicly available K2 mission data from Campaigns 1 and 0. This catalogue provides the identifiers of 8395 variable stars,

Kepler Presearch Data Conditioning I—Architecture and Algorithms for Error Correction in Kepler Light Curves

This article introduces the completely new and significantly improved version of Presearch Data Conditioning (PDC) which was implemented in Kepler SOC version 8.0, which reliably corrects errors in the light curves while at the same time preserving planet transits and other astrophysically interesting signals.

A STUDY OF THE SHORTEST-PERIOD PLANETS FOUND WITH KEPLER

We present the results of a survey aimed at discovering and studying transiting planets with orbital periods shorter than one day (ultra-short-period, or USP, planets), using data from the Kepler

A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission

The original Kepler mission achieved high photometric precision thanks to ultrastable pointing enabled by use of four reaction wheels. The loss of two of these reaction wheels reduced the telescope’s

Automated extraction of oscillation parameters for Kepler observations of solar-type stars

The recent launch of the Kepler space telescope brings the opportunity to study oscillations systematically in large numbers of solar-like stars. In the framework of the asteroFLAG project, we have