RB has invited Shi Dai to SMART collaboration. Shi has accepted.
Discussion:
MWA upgrade (Ramesh)
Phase 2 had compact and extended modes
New Phase 3 has new hardware, new signal chain
Luckily, will still have compact configuration in the short term
Paper on new pulsar is in press
ICRAR will do a press release + news item, to coincide with publication (in a few weeks)
Tentative date 20/21 April
RB thanks all who helped with the paper!
Lessons: new finds with MWA can rely on Parkes, etc for follow up
First time pulsar has been timed with MWA -- an important milestone
New GMRT and Parkes proposals in the works
GMRT proposal is about scintillation studies at high Galactic latitudes -- successful!
MWA is back online since last Friday.
Reason: new hardware procurement is delayed a few months
An opportunity for us to cover more SMART survey obs's
MWA will be in compact configuration for the rest of the year
1PPS is not there yet (as of this week), so timing might be compromised for incoming data over the next few months
Review of observations completed so far (see slides for info-graphic)
Still in "shallow" search mode. Prospects for new finds are still good!
Shared risk proposal has been submitted
Bhat, McSweeney, Swainston, Smith, Xue.
Name SM as "SMART Survey Project Scientist"
Processing Update (Nick)
Data processing:
"Quick check" 41 obs processed, 93 known pulsars detected
"Shallow search" 23 obs searched (on Garrawarla and OzStar)
Benchmarks: Table given in slides
Used LOFAR's single pulse search software and found RRAT J0410-31
Vindication that LOFAR's software works well.
RB: J0410-31 is a HTRU discovery.
Comforting that back-of-the-envelope calculations suggest that single pulse sensitivity is ~few Jy
RS: 7 sigma pulse? Is that LOFAR's detection sigma?
NS: Not sure where that number comes from.
RB: Lots not understood -- e.g. side/grating lobe detection? It's 10 deg away from pencil beam.
WvS: One of the plots was time vs DM, and it shows an interesting trace. What does it mean? Is it expected?
NS: Not sure, but it's one of the less useful diagnostics in my experience.
RB: Common theme: using LOFAR software -- maybe buggy, maybe not optimised. Question is, is it worth the effort to understand it very thoroughly?
RB: could be good for student project!
Software upgrade update (Sam)
MWA upgrade means that we will be served coarse channelised data instead of fine channelised data
If we want a homogeneous data set, we will need to do our own offline PFB
Opportunity to change software paradigm from "limited-mode pulsar backend system" to "flexible, exploratory research tool"
Modular design will greatly ease extension development down the line
Script-based interface, where individual steps are translated to a sequence of GPU kernel calls
Development period until June, then testing and commissioning, ready in time for MWA hardware upgrade.
WvS: How many people involved in development?
SM: Me and Keegan. But it's not a complete rewrite (obviously already have a working beamformer to draw from)
IM: My online beamformer is being currently developed as well. Perhaps combining our efforts, or at least liaising with each other may be beneficial to both.