Multi-epoch Low Radio Frequency Surveys of the Kepler K2 Mission Campaign Fields 3, 4, and 5 with the Murchison Widefield Array
arXiv:1905.09392 · doi:10.3847/1538-3881/ab23fc
Abstract
We present Murchison Widefield Array (MWA) monitoring of the Kepler K2 mission Fields 3, 4, and 5 at frequencies of 155 and 186 MHz, from observations contemporaneous with the K2 observations. This work follows from previous MWA and GMRT surveys of Field 1, with the current work benefiting from a range of improvements in the data processing and analysis. We continue to build a body of systematic low frequency blind surveys overlapping with transient/variable survey fields at other wavelengths, providing multi-wavelength data for object classes such as flare stars. From the current work, we detect no variable objects at a surface density above 2e-4 per square degree, at flux densities of ~500 mJy, and observation cadence of days to weeks, representing almost an order of magnitude decrease in measured upper limits compared to previous results in this part of observational parameter space. This continues to show that radio transients at metre and centimetre wavelengths are rare.
arXiv commentAccepted to The Astronomical Journal (
References in corpus (40)
- The NumPy array: a structure for efficient numerical computation
- The Transiting Exoplanet Survey Satellite
- Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
- The K2 Mission: Characterization and Early results
- The Murchison Widefield Array: the Square Kilometre Array Precursor at low radio frequencies
- The GMRT 150 MHz All-sky Radio Survey: First Alternative Data Release TGSS ADR1
- GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey I: A low-frequency extragalactic catalogue
- Chemodynamical evolution of the Milky Way disk I: The solar vicinity
- Compact continuum source-finding for next generation radio surveys
- A powerful bursting radio source towards the Galactic Centre
- Source finding in the era of the SKA (precursors): Aegean 2.0
- Temporal Smearing of Transient Radio Sources by the Intergalactic Medium
- Limits on Fast Radio Bursts and other transient sources at 182 MHz using the Murchison Widefield Array
- A 22-year Southern Sky Survey for Transient and Variable Radio Sources using the Molonglo Observatory Synthesis Telescope
- Variable and Transient Radio Sources in the FIRST Survey
- A survey for transients and variables with the Murchison Widefield Array 32-tile prototype at 154 MHz
- Variability of sub-mJy radio sources
- Faint, Large-scale H-Alpha Filaments in the Milky Way
- Exploring the Transient Radio Sky with VLITE: Early Results
- The Allen Telescope Array Twenty-centimeter Survey - A 690-Square-Degree, 12-Epoch Radio Dataset - I: Catalog and Long-Duration Transient Statistics
- Sensitive Search For Radio Variables And Transients In The Extended Chandra Deep-Field South
- Limits on low frequency radio emission from southern exoplanets with the Murchison Widefield Array
- A search for Fast Radio Bursts at low frequencies with Murchison Widefield Array high time resolution imaging
- GCRT J1742-3001: A New Radio Transient Towards the Galactic Center
- Capturing the electromagnetic counterparts of binary neutron star mergers through low latency gravitational wave triggers
- 154 MHz detection of faint, polarized flares from UV Ceti
- Post-correlation filtering techniques for off-axis source and RFI removal
- Optical Properties of faint FIRST Variable Radio Sources
- An automated archival VLA transients survey
- A search for long-timescale, low-frequency radio transients
- New methods to constrain the radio transient rate: results from a survey of four fields with LOFAR
- A search for circularly polarised emission from young exoplanets
- A Search for the Radio Counterpart to the March 1, 1994 Gamma Ray Burst
- Discovery of a Meter-Wavelength Radio Transient in the SWIRE Deep Field: 1046+59
- Coefficients of variation for detecting solar-like oscillations
- Radio Stars: from kHz to THz
- The Allen Telescope Array Pi GHz Sky Survey - III: The ELAIS-N1, Coma, and Lockman Hole Fields
- Radio variability in the Phoenix Deep Survey at 1.4GHz
- Millijansky Radio Variability in SDSS Stripe 82
- A multi-resolution, multi-epoch low radio frequency survey of the Kepler K2 mission Campaign 1 field