J0024-1931, “Keegan’s pulsar”
Discovered in last week of May
Went for GMRT and Parkes proposals, but initial “rough” localisation made follow-up difficult.
Pulsar hunting sessions revealed a stronger detection in another beam! Original detection in grating lobe
July GMRT proposal included updated localisation

“Pulsars and Fast Transients” made an official Science Working Group
Funding for 1.1 PB storage under “datasets of national significance” (Lead: Greg Sleap)
OzSTAR allocation of 250 kSU for Q3-Q4 2021
Data Central to take over completion of Webapp
Parkes proposal = full time allocated
3 papers currently in drafting stages
More meetings - monthly? (e.g. 2nd Thursday at UT 8:00?)
Discussion:

Creating a library instead of a scripting language
Called “vcsbeam”
Incremental development by cleaning up the existing code, so that easier to test for correctness
Heavily relying on new mwalib library, provided and supported by MWA Ops team.
Library-isation almost complete

Kernels have been written, not yet tested
Have simultaneous legacy & MWAX data now to test it against (as of a couple of weeks ago), although the data may have problems because running both the legacy system (for the last time before it was retired!) and the new MWAX system in parallel put a lot of stress on the system.
Commissioning of the MWAX system still in the near future!

Honours project is using a semi-supervised GAN.
Retraining portions of the (and perhaps the whole) network proving necessary.
Currently sitting near ~70-80% accuracy.
Gaining confidence that we’ll have a usable product by the end of the project (~November) that is at least as good as the current LOFAR system that we’re using.

Keegan’s pulsar shows extremely interesting sub-pulse drifting behaviour
Clearly has multiple drift modes, but P3 changes (gradually) so much during individual modes that characterisation of the modes by P3 (or drift rate) is not possible.
Actually have many more positive detections in archival MWA data spanning a long time period -- getting a timing solution seems possible
Excellent example of the benefits of longer dwell times -- to catch the bright intermittent ones!

There has been an excellent agreement of the theoretical grating lobe prediction and the tied array beams in which B2327-20 was detected
This may open up new strategies for finding true candidates by looking for candidates in nearby beams that have similar periods and DMs.

Browser not supported