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Showing results for: [ compact binaries and/or black-holes ]
Recently there has been great success at Parkes discovering millisecond pulsars (MSPs), a class that includes some of the most interesting and scientifically valuable pulsars known. In the last few ye... morears, we have discovered more than 40 MSPs though the High Time Resolution Universe Survey (P630) and Fermi searches (P675/P814). Here we propose to carry out precision timing of these sources to fully exploit these discoveries. Additionally, we continue to study the most significant of the discoveries from the Parkes Multibeam Pulsar Survey (P268). To maximise scientific impact, we have combined the most important sources from various previous proposals into this project, reducing total observation time required and easing the burden on the scheduler.less
Australia Telescope National Facility - P789 - Timing of Binary & Millisecond Pulsars Discovered at Parkes - Published 16 Nov 2019
SUPERBx looks at the highest Galactic latitudes in a search for pulsars and fast radio bursts (FRBs). We use optimised GPU codes and supercomputing to search for these, making discoveries in real time... more. Handling our data as it comes in is essential for the SKA Phase I era so this work applies directly to the high-data rates of next generation telescopes. Our pulsar discoveries are typically nearby scintillating sources, intermittent sources and those in interesting binary systems. Our FRB discoveries have discovery lags of ~1 second, rather than months/years and these feed rapid alerts to the world-wide follow-up community via a dedicated VOEvent format an Astronomer's Telegrams. The goal of this is to allow localisation of the discovered FRBs. This is key for identifying FRB host galaxies, so as to solve the mystery of their progenitors and to exploit their many uses as tools for precision cosmology measurements.less
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 07 Nov 2019
Australia Telescope National Facility - P789 - Timing of Binary & Millisecond Pulsars Discovered at Parkes - Published 18 Oct 2019
This is a request for observing time for the initial follow-up of pulsar discoveries from the low-latitude Galactic plane section of the HTRU survey (P630). We have now completed a first pass processi... moreng of the entire survey with our periodicity search algorithm as well as the partially-coherent segmented acceleration search pipeline, and have discovered 106 previously unknown pulsars. Interesting science can usually only be derived from a new pulsar after confirmation and a follow-up timing campaign is carried out. One year of initial timing is the minimum timespan required to fully characterise any newly-discovered pulsars, essential for deriving pulsar parameters such as the characteristic age, magnetic ?eld strength, spin-down rate, as well as to detect any unexpected behaviour of the pulsar which might result from emission instabilities. This follow-up timing project is necessary for following up on any interesting pulsar systems discovered from the HTRU Galactic plane survey. Since all of the pulsars on the observing list here are being followed-up for the first time, they will produce completely new and exciting results. In addition, this timing project will enable a large-scale examination of the Galactic plane pulsar population, exploring the true boundaries of pulsar parameter space.less
Australia Telescope National Facility - P860 - Initial Follow-up of Pulsar Discoveries from the HTRU Galactic Plane Survey - Published 16 Oct 2019
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 15 Oct 2019
Recently, extreme plasma lensing of pulsar emission has been observed in two eclipsing binaries, PSR B1957+20 and PSR B1744-24A. These lensing events are an extremely sensitive probe of pulsar emissi... moreon, resolving physical scales of ~10 km at the pulsar, and can be used to measure the magnetization of the intrabinary material, and constrain outflow velocities and mass-loss rates of the binaries. We propose to observe the 5 brightest eclipsing pulsars (B1718-19, J1723-2837, B1744-24A, B1957+20, J2051-0827), to search for the effects of plasma lensing, and to make use of the new Parkes Ultra Wide Band Low Frequency (UWL) receiver, which will allow us to resolve lensing events in frequency and time, which is crucial for constraining physical parameters. This study will help determine how ubiquitous the effects of plasma lensing are in eclipsing binaries, put improved physical scales on the locations of pulsar emission, and help shed light on the nature of eclipses and evolutionary pathways of these systems.less
Australia Telescope National Facility - P1007 - An Ultra Wide-Band study of plasma lensing in eclipsing binaries - Published 08 Oct 2019
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 07 Oct 2019
Australia Telescope National Facility - P860 - Initial Follow-up of Pulsar Discoveries from the HTRU Galactic Plane Survey - Published 06 Oct 2019
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 06 Oct 2019
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 05 Oct 2019
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 04 Oct 2019
Australia Telescope National Facility - P789 - Timing of Binary & Millisecond Pulsars Discovered at Parkes - Published 01 Oct 2019
Australia Telescope National Facility - P860 - Initial Follow-up of Pulsar Discoveries from the HTRU Galactic Plane Survey - Published 06 Sep 2019
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 20 Aug 2019
Australia Telescope National Facility - P789 - Timing of Binary & Millisecond Pulsars Discovered at Parkes - Published 20 Aug 2019
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 09 Aug 2019
Australia Telescope National Facility - P892 - SUPERBx - The SUrvey for Pulsars & Extragalactic Radio Bursts Extension - Published 08 Aug 2019
Australia Telescope National Facility - P1007 - An Ultra Wide-Band study of plasma lensing in eclipsing binaries - Published 06 Aug 2019
Australia Telescope National Facility - P860 - Initial Follow-up of Pulsar Discoveries from the HTRU Galactic Plane Survey - Published 06 Aug 2019
Australia Telescope National Facility - P1007 - An Ultra Wide-Band study of plasma lensing in eclipsing binaries - Published 01 Aug 2019
Australia Telescope National Facility - P1007 - An Ultra Wide-Band study of plasma lensing in eclipsing binaries - Published 28 Jul 2019
Australia Telescope National Facility - P789 - Timing of Binary & Millisecond Pulsars Discovered at Parkes - Published 26 Jul 2019
Australia Telescope National Facility - P1007 - An Ultra Wide-Band study of plasma lensing in eclipsing binaries - Published 24 Jul 2019
Australia Telescope National Facility - P860 - Initial Follow-up of Pulsar Discoveries from the HTRU Galactic Plane Survey - Published 05 Jul 2019
Australia Telescope National Facility - P1007 - An Ultra Wide-Band study of plasma lensing in eclipsing binaries - Published 01 Jul 2019
