{"dataCollectionTypeCode":"ENCAPSULATED_PULSAR","id":{"identifierType":"Fedora PID","identifier":"csiro:69548"},"dataCollectionId":69548,"dataCollectionCommonId":69548,"versionNumber":1,"dataVersionNumber":1,"self":"https://data.csiro.au/dap/ws/v2/collections/69548","landingPage":{"relationship":"alternate","mediaType":"text/html","href":"https://data.csiro.au/collection/csiro:69548","fileUpload":false,"fileId":0},"title":"Long-term project observations for project P456 semester 2025OCTS_03","description":"The Parkes Pulsar Timing Array (PPTA) project has three primary goals: (a) detection of gravitational waves from astronomical sources, (b) establishment of a pulsar timescale, and (c) improvement of our understanding of Solar-system dynamics. We are now in an exciting regime where a signal detected in our (and other data sets) has the form expected for a gravitational wave background. We, along with the international community, are now working hard to either confirm or deny this result, and to determine the astrophysical origin of this signal. With this proposal, we aim to maintain our pre-eminent position in the field. This is a continuing proposal for which observations of millisecond pulsars (MSPs) will continue to improve bounds on ultra-low-frequency gravitational waves until they are detected with confidence. Continued Parkes observations will remain valuable at least until the first stage of the SKA is able to improve on our sensitivity and observing cadence. Even after the gravitational wave background is detected, continued observations will resolve the background origin and individual sources will be identified; advancing the nascent field of gravitational wave astronomy.","legacyId":null,"fieldsOfResearch":["Astronomical sciences not elsewhere classified"],"dataStartDate":"2025-10-01","dataEndDate":"2026-03-31","keywords":"pulsars, neutron stars","licence":"Creative Commons Attribution 4.0 International Licence","licenceLink":{"relationship":"licence","mediaType":"text/html","href":"https://data.csiro.au/dap/ws/v2/licences/1121","fileUpload":false,"fileId":0},"organisations":["CSIRO (Australia)"],"attributionStatement":"Zic, Andrew; Manchester, Dick; Sarkissian, John; Hobbs, George; Bailes, Matthew; Bhat, Ramesh; Coles, William; van Straten, Willem; Russell, Chris; Oslowski, Stefan; Kerr, Matthew; Shannon, Ryan; Kaczmarek, Jane; Zhu, Xingjiang; Dai, Shi; Reardon, Daniel John; Zhang, Lei; Zhang, Songbo; Wang, Shuangqiang;...Cardinal Tremblay, Jacob (2025): Long-term project observations for project P456 semester 2025OCTS_03. v1. CSIRO. Data Collection. https://doi.org/10.25919/mjth-4197","rights":"All Rights (including copyright) CSIRO 2025.","access":"Access to this collection's metadata and/or files (if any) are restricted until 30 Sept 2027. ","published":"2025-11-04T12:59:09.380+11:00","leadResearcher":"Andrew Zic","versions":"https://data.csiro.au/dap/ws/v2/collections/69548/versions","metadata":"https://data.csiro.au/dap/ws/v2/collections/69548/metadata","data":"https://data.csiro.au/dap/ws/v2/collections/69548/data","serviceCount":0,"supportingFiles":"https://data.csiro.au/dap/ws/v2/collections/69548/support","contributors":["Dick Manchester","John Sarkissian","George Hobbs","Matthew Bailes","Ramesh Bhat","William Coles","Willem van Straten","Chris Russell","Stefan Oslowski","Matthew Kerr","Ryan Shannon","Jane Kaczmarek","Xingjiang Zhu","Shi Dai","Daniel John Reardon","Lei Zhang","Songbo Zhang","Shuangqiang Wang","Malgorzata Curylo","Rami Mandow","Xiaojin Liu","Agastya Kapur","Wenhua Ling","Saurav Mishra","Zu-Cheng Chen","Valentina Di Marco","Karolina Rożko","Kyzysztof Maciesiak","Pratyasha Gitika","Atharva Kulkarni","Jacob Cardinal Tremblay"],"allNames":[{"name":"Zic, Andrew","display":"Andrew Zic","orcidId":null,"type":"Person","orgInfo":"CSIRO Australia Telescope National Facility, Australia"},{"name":"Manchester, Dick","display":"Dick Manchester","orcidId":"0000-0001-9445-5732","type":"Person","orgInfo":"CSIRO Australia Telescope National Facility, Australia"},{"name":"Sarkissian, John","display":"John Sarkissian","orcidId":null,"type":"Person","orgInfo":"CSIRO Australia Telescope National Facility, Australia"},{"name":"Hobbs, George","display":"George Hobbs","orcidId":"0000-0003-1502-100X","type":"Person","orgInfo":"CSIRO Australia Telescope National Facility, Australia"},{"name":"Bailes, Matthew","display":"Matthew Bailes","orcidId":null,"type":"Person","orgInfo":"Swinburne University of Technology, Australia"},{"name":"Bhat, Ramesh","display":"Ramesh Bhat","orcidId":null,"type":"Person","orgInfo":"Curtin University, Australia"},{"name":"Coles, William","display":"William Coles","orcidId":null,"type":"Person","orgInfo":"University of California, San Diego, United States"},{"name":"van Straten, Willem","display":"Willem van Straten","orcidId":null,"type":"Person","orgInfo":"Auckland University of Technology, New Zealand"},{"name":"Russell, Chris","display":"Chris Russell","orcidId":null,"type":"Person","orgInfo":"CSIRO Other, Australia"},{"name":"Oslowski, Stefan","display":"Stefan Oslowski","orcidId":null,"type":"Person","orgInfo":"CSIRO Space and Astronomy, Australia"},{"name":"Kerr, Matthew","display":"Matthew Kerr","orcidId":null,"type":"Person","orgInfo":"Naval Research Laboratories, United States"},{"name":"Shannon, Ryan","display":"Ryan Shannon","orcidId":null,"type":"Person","orgInfo":"Swinburne University of Technology, Australia"},{"name":"Kaczmarek, Jane","display":"Jane Kaczmarek","orcidId":"0000-0003-4810-7803","type":"Person","orgInfo":"CSIRO Space and Astronomy, Australia"},{"name":"Zhu, Xingjiang","display":"Xingjiang Zhu","orcidId":null,"type":"Person","orgInfo":"Beijing Normal University, China"},{"name":"Dai, Shi","display":"Shi Dai","orcidId":"0000-0002-9618-2499","type":"Person","orgInfo":"CSIRO Space and Astronomy, Australia"},{"name":"Reardon, Daniel John","display":"Daniel John Reardon","orcidId":null,"type":"Person","orgInfo":"Swinburne University of Technology, Australia"},{"name":"Zhang, Lei","display":"Lei Zhang","orcidId":null,"type":"Person","orgInfo":"National Astronomical Observatories, Beijing, China"},{"name":"Zhang, Songbo","display":"Songbo Zhang","orcidId":null,"type":"Person","orgInfo":"Purple Mountain Observatory, China"},{"name":"Wang, Shuangqiang","display":"Shuangqiang Wang","orcidId":null,"type":"Person","orgInfo":"Xinjiang Astronomical Observaotry, China"},{"name":"Curylo, Malgorzata","display":"Malgorzata Curylo","orcidId":null,"type":"Person","orgInfo":"Monash University, Australia"},{"name":"Mandow, Rami","display":"Rami Mandow","orcidId":null,"type":"Person","orgInfo":"Macquarie University, Australia"},{"name":"Liu, Xiaojin","display":"Xiaojin Liu","orcidId":null,"type":"Person","orgInfo":"Beijing Normal University, China"},{"name":"Kapur, Agastya","display":"Agastya Kapur","orcidId":null,"type":"Person","orgInfo":"Macquarie University, Australia"},{"name":"Ling, Wenhua","display":"Wenhua Ling","orcidId":"0009-0009-9142-6608","type":"Person","orgInfo":"CSIRO Space and Astronomy, Australia"},{"name":"Mishra, Saurav","display":"Saurav Mishra","orcidId":null,"type":"Person","orgInfo":"CSIRO Australia Telescope National Facility, Australia"},{"name":"Chen, Zu-Cheng","display":"Zu-Cheng Chen","orcidId":null,"type":"Person","orgInfo":"Hunan Normal University, China"},{"name":"Di Marco, Valentina","display":"Valentina Di Marco","orcidId":null,"type":"Person","orgInfo":"University of Melbourne, Australia"},{"name":"Rożko, Karolina","display":"Karolina Rożko","orcidId":null,"type":"Person","orgInfo":"University of Zielona Gora, Poland"},{"name":"Maciesiak, Kyzysztof","display":"Kyzysztof 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Audio-band gravitational waves\n  have been discovered by LIGO and the pulsar timing arrays may be about to open an era of ultra-low-frequency gravitational wave science. Such a discovery would open up a window into presently unobservable phenomena such as orbiting black holes in the cores of distant galaxies. Pulsars are such precise clocks that the effect of a weak gravitational wave from such sources passing over the Earth may be detectable. The Parkes Pulsar Timing Array project aims to make precise timing measurements on 20 millisecond pulsars with observations every two or three week over many years. The data has also allowed us to establish a pulsar timescale which is comparable in precision to the best terrestrial timescales based on atomic clocks.","activityInstrument":"Long-term project"},"domainType":"ATNF","collectionContentType":"Data","andsPid":"102.100.100/710943","doi":"10.25919/mjth-4197","project":{"irpHierarchy":false,"projectTitle":"Australia Telescope National Facility"},"nationalFacility":"Australia Telescope National Facility","nationalCollection":"Australia Telescope National Facility","organisationalLevels":{"irpHierarchy":true,"businessUnit":"SPACE AND ASTRONOMY","team":"NSW Observatory Operations","program":"Australia Telescope National Facility","group":"ATNF Operations"},"accessLevel":"Project Team","dataRestricted":"FALSE","voResource":{"ivoIdentifier":"ivo://au.csiro.atnf/P456-2025OCTS"},"depositStatus":"P","accessViewable":false,"withdrawn":false,"blocked":false,"askapLevel7":false,"permaLink":"https://doi.org/10.25919/mjth-4197","selfLink":"https://data.csiro.au/collection/csiro:69548","templateCollection":false}