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1. Time-Domain Science Pipelines for the OVRO-LWA

   https://doi.org/10.23919/at-ap-rasc54737.2022.9814199  

   Huang, Yuping; Laures, Mei-Ling; Anderson, Marin M.; Law, Casey J.; Hallinan, Gregg (May 2022, 2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC))

   The Owens Valley Radio Observatory Long Wavelength Array is a low radio frequency all-sky imaging radio interferometer. The full 352-element array will generate more than 2 TB of visibility data per hour of observation. One of the array’s primary science cases, the search for variable radio emission from exoplanets and for transients, require fast and high dynamic range interferometric imaging. Here we detail the design and implementation of a two-pipeline infrastructure that minimizes development cost: an offline pipeline that facilitates experimentation with existing pack-ages, and a real-time pipeline that minimizes overhead. 

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2. Observing flare stars below 100 MHz with the LWA

   https://doi.org/10.1093/mnras/staa988  

   Davis, Ivey; Taylor, Greg; Dowell, Jayce (June 2020, Monthly Notices of the Royal Astronomical Society)

   ABSTRACT We observed the flare stars AD Leonis, Wolf 424, EQ Pegasi, EV Lacertae, and UV Ceti for nearly 135 h. These stars were observed between 63 and 83 MHz using the interferometry mode of the Long Wavelength Array. Given that emission from flare stars is typically circularly polarized, we used the condition that any significant detection present in Stokes I must also be present in Stokes V at the same time in order for us to consider it a possible flare. Following this, we made one marginal flare detection for the star EQ Pegasi. This flare had a flux density of 5.91 Jy in Stokes I and 5.13 Jy in Stokes V, corresponding to a brightness temperature 1.75 × 1016(r/r*)−2 K. 

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3. Self-triggered radio detection and identification of cosmic air showers with the OVRO-LWA

   https://doi.org/10.1016/j.nima.2019.163086  

   Monroe, Ryan; Romero Wolf, Andres; Hallinan, Gregg; Nelles, Anna; Eastwood, Michael; Anderson, Marin; D’Addario, Larry; Kocz, Jonathon; Wang, Yuankun; Cody, Devin; et al (February 2020, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment)
4. Spatially Resolved Observations of Meteor Radio Afterglows With the OVRO‐LWA

   https://doi.org/10.1029/2023JA032272  

   Varghese, S S; Dowell, J; Obenberger, K S; Taylor, G B; Anderson, M; Hallinan, G (February 2024, Journal of Geophysical Research: Space Physics)

   Abstract We conducted an all‐sky imaging transient search with the Owens Valley Radio Observatory Long Wavelength Array (OVRO‐LWA) data collected during the Perseid meteor shower in 2018. The data collection during the meteor shower was motivated to conduct a search for intrinsic radio emission from meteors below 60 MHz known as the meteor radio afterglows (MRAs). The data collected were calibrated and imaged using the core array to obtain lower angular resolution images of the sky. These images were input to a pre‐existing LWA transient search pipeline to search for MRAs as well as cosmic radio transients. This search detected 5 MRAs and did not find any cosmic transients. We further conducted peeling of bright sources, near‐field correction, visibility differencing and higher angular resolution imaging using the full array for these 5 MRAs. These higher angular resolution images were used to study their plasma emission structures and monitor their evolution as a function of frequency and time. With higher angular resolution imaging, we resolved the radio emission size scales to less than 1 km physical size at 100 km heights. The spectral index mapping of one of the long duration event showed signs of diffusion of plasma within the meteor trails. The unpolarized emission from the resolved radio components suggest resonant transition radiation as the possible radiation mechanism of MRAs. 

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5. Imaging Spectroscopy of CME-associated Solar Radio Bursts using OVRO-LWA

   https://doi.org/10.3847/1538-4357/abc94b  

   Chhabra, Sherry; Gary, Dale E.; Hallinan, Gregg; Anderson, Marin M.; Chen, Bin; Greenhill, Lincoln J.; Price, Danny C. (January 2021, The Astrophysical Journal)

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