WUNA Lunch Talk
| Date & Time | Wednesday July 18, 2012
12:10-1:00pm |
| Location | NRAO, Room 230 |
| Title | Selection of Radio Pulsar Candidates Using Artificial Intelligence AND 19 Years High Precision Timing of the Millisecond Pulsar |
| Speaker | Weiwei Zhu, University of British Columbia | | Abstract | Selection of Radio Pulsar Candidates Using Artificial
Intelligence
Millions of pulsar candidates have been produced by recent pulsar
surveys; they cannot be inspected by human experts in a practical time
frame. Here we present a supervised machine learning program for
automatically identifying good pulsar candidates. The program is trained
using several different candidate features including images and plots
that human experts also look at. This program is being applied to the
P-ALFA pulsar survey and can be applied to other future surveys as well.
19 Years High Precision Timing of the Millisecond Pulsar
PSR J1713+0747 is one of the best high-timing-precision pulsars
monitored by the NANOGrav project for the purpose of detecting
gravitational waves. We report the analysis of a 19-year span of timing
data on PSR J1713+0747 taken by the Arecibo and Green Bank telescopes. The new timing solution we found improves the measurement of the pulsar's mass, its orbital and geometric parameters, and set new limits on alternative gravitational theories. |
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