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Date:

Time: 13:00 ET 

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VLASS SSG Meeting Notes

  1. Observing and data processing status – Amy Kimball, Mark Lacy

    • Epoch 3.1 is 72% observed

    • BnA at the end of May for the rest

    • QL imaging is 43% complete, automated QA going well

    • No more SE imaging yet

  2. Updates from working groups:

    • Extragalactic - Kate Alexander, Heinz Andernach

      • New paper on arXiv:2303.12830 by Gordon+23 (DRAGN hunting)

    • Galactic - Laurant Loinard, Adam Ginsburg

      • Galactic pulsars (Shami + Dillon discussed at DSA-2000 meeting)

    • Transients - Gregg Hallinan, Greg Sivakoff

      • Transient conference

        • Deadline for abstracts in 2 weeks!

      • New transient identified by Yuyang Chen (point source inside galactic supernova remnant)

      • Dillon’s transient catalog is progressing, real time transient identification of transients coming soon to go after faster transient pops - open to ideas

    • Polarization - Bryan Gaensler, Jennifer West

      • New cubes being analyzed (pol + spectral indices from cubes; spix being compared with other CIRADA products)

      • POSSUM collaboration

      • New computing resources

    • Commensal - Wendy Peters, Chenoa Trembley

    • Data Products - Dillon Dong, Erik Rosolowsky

    • Science communication - Brian Kent, Erik Murphy

      • NRAO will send announcement today about activities at AAS, VLASS splinter

    • EPO - Jacob Noel-Storr, Summer Ash

      • VLA open house on April 1, public talks

    • Other topics?

      • CIRADA Epoch 2 VLASS catalog status?

        • Sidelobe detection between QL and SE under investigation . . . 

        • Sidelobe probability/other flags for this catalog currently being explored

    • Science presentation - VLASS Epoch 4 (Mark Lacy)

        • 1900 hr of time (in addition to 5600 hr for first 3 epochs)
        • 4.1 would start in 2025, 4.2 in 2026/2027
        • Science
          • VLASS has demonstrated important new science on slow transients (especially via comparison to FIRST)
          • Epoch 4 would allow us to reduce the gap between VLASS Epoch 1-2 and FIRST
          • VLASS remains unique compared to other transient surveys in terms of resolution and frequency coverage
          • Variations in polarimetry remains unexplored
          • Slightly better SNR for faint sources in coadds (probe well into SF galaxy population with improved sensitivity)
        • Logistics
          • Improve commensal survey datasets (VCSS and COSMIC had some issues in 3.1)
          • VLASS1.1 was compromised due to antenna pointing issues
          • Key opportunity: VLASS could be a good transitional project from VLA to ngVLA, also complementary to DSA-2000 timescale (stepping stone)

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Reference material:

  • Terms of reference document: pdf 
  • VLASS Slack workspace and SSG channel (contact Bryan Gaensler)
  • Confluence page
  • Next meeting: Monday, April 2nd at 1pm EST / 11am MST / 18:00 UTC
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