Present:

Garvit Grover
Susmita Sett
Sam McSweeney
Ramesh Bhat
Steven Tremblay
Shi Dai
Willem van Straten
Mengyao Xue
Ryan Shannon

Agenda:

1. General updates (Ramesh)
2. Calibration of SMART obs (Sammy)
3. FAST follow-up of MWA pulsars (Mengyao)
4. Simulation exercise to test FFA (Garvit)
5. MWA imaging of PSR J0026 (Sammy/Ramesh)
6. Paper updates (Ramesh/Sammy)
7. Discussion on the PFT policy (all)

Minutes:

General updates (Ramesh)
- Update on MWA and 2022A: "MWA is officially back online", ~100 tiles functioning
  - Installing 17th receiver (= 136 tiles) – stepping towards Phase III (target = 256 tiles)
  - Compact configuration will not come back until end of semester (~Sep? Oct?) – no change since last update
- PSR #2 followup
  - Imaged with GMRT (Band 3 & Band 4)
  - Positional offset of 30'' between MWA and GMRT consistent with ionospheric. Other(?) offsets within 4''.
- PSR #3 followup
  - UWL detection (thanks to Shi): S1600 ~ 0.1 mJy
  - GMRT detection Band 3, ~30 mins
    - Detection in band 3 image faint, possibly non-detection
    - Detection in band 4 also faint, but identification of pulsar with a few closely-spaced sources is tricky.
- Other updates
  - Processing slow down (ASVO has been down)
  - Carry-on effects = haven't been able to complete requested processing time
  - Webapp further development has been requested
  - MWAX commissioning won't progress until Aug/Sept
  - SGAN tool yet to be implemented
  - Isaac Colleran got honourable mention for his Honours thesis
Discussion on the PFT policy (all)
- Need to formalise before upcoming MWA Project meeting – written policy required by MWA board
- Probably can be "minimal" in terms of structure
- Summary of points to consider (not listed in these minutes)
- Ryan: Points should include "future capabilities", "scope of SWG's work"
  - Ramesh: Yes, agree. Scope can be broadened
- **Willem leaves**
- Sam: To what extent can we rely on default MWA policy?
  - Ramesh: publication policy is already well defined, but data management is "group-specific" and needs to be addressed. Similarly for defining how work duplication is avoided.
- Mengyao: Should include up-to-date list of projects for better management of diversity of projects, at increasing number of places around the world
  - Ramesh: Agreed.
Calibration (Sam)
- Calibration solutions by Nick previously using RTS
- Working on polarisation calibration
- All solutions on SMART Web app
- Improving the solutions - remake with Hyperdrive, interpolate over RFI-ridden channels, improved sky models to reduce power in XY and YX, some extra tile flagging is warranted
- Main concern - get polarisation right!
- Finding the X-Y phase offset - Using only stokes I models so not constrained,
- Model using single number - stable in time
- Plan forward - Garvit follow up of an obs 1267111608, which has B0943+10, use fractional polarisation to check leakage from I as pulsar passes through primary beam, verify/repeat for other pulsars
FAST follow-up of MWA pulsars (Mengyao)
- Granted several hrs to observe PSR #1 (only one in MWA/FAST common sky)
- Interesting for its scintillation
- PRESTO/PSRCHIVE plots shown
- Second observing run had lots of RFI, but can be seen in the last minutes!
- Ramesh & Sam: Surprising to see how it behaves in time/frequency for second observing run!
- Ramesh: Can we ask for make-up time for second obs (because of RFI)?
  - Mengyao: Can ask in August
Garvit's update:
- Following up candidates for most recent batch of ranked candidates – nothing convincing yet, is ongoing
- Other work is making simulations of pulsar signals in order to compare different search algorithms compare (FFT vs FFA vs single pulse)
- Ramesh: GMRT just published a paper on a similar exercise (comparing FFT and FFA)
Ramesh update on survey description paper
- Timescale for getting survey description paper out to MWA collaboration review = ~ a few weeks
- Almost all sections written (just lacking a couple of paragraphs from Ramesh and Sam)
- Last remaining major task is finalising table and profile gallery plot
- Brad and Steven to do first pass reading

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