Expanded Owens Valley Solar Array

EOVSA (Expanded Owens Valley Solar Array) is a new solar-dedicated radio interferometer operated by the New Jersey Institute of Technology. This wiki serves as the site for EOVSA documentation.

EOVSA Documentation

• General
  • Downconversion and Frequency Tuning
  • Dealing with Radio Frequency Interference
  • Switching between 200 MHz and 300 MHz Correlator

• Computer-Network
  • Computing Systems
  • Network

• Control System
  • 27-m Antenna Commands
  • Schedule Commands
  • Control Commands
  • Attenuation and Level Control

• Hardware
  • Hardware Overview
  • 2.1-m Antennas
  • 27-m Antennas

• System Software
  • Calibration Database
  • Stateframe Database
  • Create CASA measurement sets

• Calibration
  • Calibration Overview
  • Pointing Calibration
  • Total Power Calibration
  • System Gain Calibration
  • Antenna Position (Baseline Calibration)
  • Reference Gain Calibration
  • Daily Gain Calibration
  • Delay Calibration
  • Bandpass Calibration
  • Polarization Calibration
  • Calibrator Survey
  • Practical Calibration Tutorial

• Starburst

Using EOVSA Data

• EOVSA Data products
• Analysis Software
  • SunCASA A wrapper around CASA (the Common Astronomy Software Applications package) for synthesis imaging and visualizing solar spectral imaging data. CASA is one of the leading software tool for "supporting the data post-processing needs of the next generation of radio astronomical telescopes such as ALMA and VLA", an international effort led by the National Radio Astronomy Observatory. The current version of CASA uses Python (2.7) interface. More information about CASA can be found on NRAO's CASA website . Note, CASA is available ONLY on UNIX-BASED PLATFORMS (and therefore, so is SunCASA).
  • GSFIT A IDL-widget(GUI)-based spectral fitting package called gsfit, which provides a user-friendly display of EOVSA image cubes and an interface to fast fitting codes (via platform-dependent shared-object libraries).
  • Spectrogram Software
  • Mapping Software
• Data Analysis Guides
  • EOVSA Data Analysis Tutorial at RHESSI XVIII Workshop
  • Self-Calibrating Flare Data Example script and guides for self-calibrating EOVSA flare data (to be completed)

• EOVSA Modeling Guide
  • GX Simulator

• Other helpful links
  • CASA Guides
  • SolarSoft IDL
  • Miriad Guides
  • Fast Gyrosynchrotron Codes (Alexey Kuznetsov's website)
  • Basic GitHub Tutorial

• Full Disk Simulations
• All-Day Synthesis Issues
• Analyzing Pre-2017 Data

System Software

• LabVIEW software
• Python code Github repository

Observing Log

2016 November; December

2017 January; February; March; April; May; June; July; August; September; October; November; December

2018 January; February; March; April; May; June; July; August; September; October; November; December

2019 January; February; March; April; May; June; July; August; September; October; November; December

2020 January; February; March; April; May; June; July; August; September; October; November; December

Tohbans

Trouble Shooting Guide

Tohban Records

Owen's Notes

EOVSA Flare List

See this link for a list of EOVSA flares as a Google Spreadsheet.

Another link available at the EOVSA website.

EOVSA Publications

Here is a (partial) list of publications that utilize EOVSA data.

2020

Yu et al. (2020), ApJ, in press (check back later for link) Magnetic Reconnection During the Post Impulsive Phase of the X8.2 Solar Flare: Bi-Directional Outflows as a Cause of Microwave and X-ray Bursts

Chen et al. (2020b), Nature Astronomy, Jul 27, 2397 Measurement of magnetic field and relativistic electrons along a solar flare current sheet

Chen et al. (2020a), ApJL, 895, 50 Microwave Spectral Imaging of an Erupting Magnetic Flux Rope: Implications for the Standard Solar Flare Model in Three Dimensions

Kuroda et al. (2020), Frontiers, 7, 22 Evolution of Flare-accelerated Electrons Quantified by Spatially Resolved Analysis

Glesener et al. (2020), ApJL, 891, 34 Accelerated Electrons Observed Down to <7 keV in a NuSTAR Solar Microflare

Karlicky at al. (2020), ApJ, 889, 72 Drifting Pulsation Structure at the Very Beginning of the 2017 September 10 Limb Flare

Fleishman et al. (2020), Science, 367, 278 Decay of the coronal magnetic field can release sufficient energy to power a solar flare

Gary et al. (2020) AAS iPoster A new view of the solar atmosphere: daily full-disk multifrequency radio images from EOVSA

2018

Polito et al. (2018), ApJ, 864, 63 Broad Non-Gaussian Fe XXIV Line Profiles in the Impulsive Phase of the 2017 September 10 X8.3-class Flare Observed by Hinode/EIS

Gary et al. (2018), ApJ, 863, 83 Microwave and Hard X-Ray Observations of the 2017 September 10 Solar Limb Flare

Kuroda et al. (2018), ApJ, 852, 32 Three-dimensional Forward-fit Modeling of the Hard X-ray and the Microwave Emissions of the 2015 June 22 M6.5 flare

2016

Nita et al. (2016), J. Astron. Instr., 5, 1641009-7366 EOVSA Implementation of a Spectral Kurtosis Correlator for Transient Detection and Classification

VLA Flare List

See this link for a list of VLA flare observations.