New Limits on the Low-frequency Radio Transient Sky Using 31 hr of All-sky Data with the OVRO–LWA

@article{Anderson2019NewLO,
  title={New Limits on the Low-frequency Radio Transient Sky Using 31 hr of All-sky Data with the OVRO–LWA},
  author={Marin M. Anderson and Gregg W. Hallinan and Michael W. Eastwood and Ryan M. Monroe and Thomas A. Callister and Jayce Dowell and Brian Hicks and Yuping Huang and Namir E. Kassim and Jonathon Kocz and T. Joseph W. Lazio and Danny C. Price and Frank K. Schinzel and Gregory B. Taylor},
  journal={The Astrophysical Journal},
  year={2019},
  volume={886}
}
We present the results of the first transient survey from the Owens Valley Radio Observatory Long Wavelength Array (OVRO–LWA) using 31 hr of data, in which we place the most constraining limits on the instantaneous transient surface density at timescales of 13 s to a few minutes and at frequencies below 100 MHz. The OVRO–LWA is a dipole array that images the entire viewable hemisphere with 58 MHz of bandwidth from 27 to 84 MHz at 13 s cadence. No transients are detected above a 6.5σ flux… 

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References

SHOWING 1-10 OF 67 REFERENCES

Limits on Fast Radio Bursts and other transient sources at 182 MHz using the Murchison Widefield Array

We present a survey for transient and variable sources, on time-scales from 28 s to ∼1 yr, using the Murchison Widefield Array (MWA) at 182 MHz. Down to a detection threshold of 0.285 Jy, no

EXPLORING THE TRANSIENT RADIO SKY WITH VLITE: EARLY RESULTS

We report on a search for radio transients at 340 MHz with the Jansky Very Large Array Low-band Ionosphere and Transient Experiment (VLITE). Between 2015 July 29 and September 27, operating in

A Simultaneous Search for Prompt Radio Emission Associated with the Short GRB 170112A Using the All-sky Imaging Capability of the OVRO-LWA

We have conducted the most sensitive low-frequency (below 100 MHz) search to date for prompt, low-frequency radio emission associated with short-duration gamma-ray bursts (GRBs), using the Owens

DISCOVERY OF A METER-WAVELENGTH RADIO TRANSIENT IN THE SWIRE DEEP FIELD: 1046+59

We report the results of a low frequency radio variability and slow transient search using archival observations from the Very Long Array. We selected six 325 MHz radio observations from the spring

LOFAR MSSS: Detection of a low-frequency radio transient in 400 h of monitoring of the North Celestial Pole

We present the results of a four-month campaign searching for low-frequency radio transients near the North Celestial Pole with the Low-Frequency Array (LOFAR), as part of the Multifrequency Snapshot

New methods to constrain the radio transient rate: results from a survey of four fields with LOFAR.

It is shown that low-frequency radio surveys are more sensitive to steep-spectrum coherent transient sources than GHz radio surveys, and upper limits for the transient surface density for transients of different time-scales are calculated.

SURVEYING THE DYNAMIC RADIO SKY WITH THE LONG WAVELENGTH DEMONSTRATOR ARRAY

This paper presents a search for radio transients at a frequency of 73.8 MHz (4 m wavelength) using the all-sky imaging capabilities of the Long Wavelength Demonstrator Array (LWDA). The LWDA was a

The Radio Sky at Meter Wavelengths: m-mode Analysis Imaging with the OVRO-LWA

A host of new low-frequency radio telescopes seek to measure the 21 cm transition of neutral hydrogen from the early universe. These telescopes have the potential to directly probe star and galaxy

Detection of a Low-frequency Cosmic Radio Transient Using Two LWA Stations

We report the detection of a potential cosmic radio transient source using the two stations of the Long Wavelength Array. The transient was detected on 2017 October 18 08:47 UTC near the celestial

A search for long-time-scale, low-frequency radio transients

We present a search for transient and highly variable sources at low radio frequencies (150–200 MHz) that explores long time-scales of 1–3 yr. We conducted this search by comparing the TIFR GMRT Sky
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