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Parkes observations for project P895 semester 2020APRS_02
Since the year 2005, the Parkes Pulsar Timing Array (PPTA) project has been placing ever more stringent constraints on the amplitude of a gravitational wave background signal. Such upper bounds on the amplitude of the gravitational wave signal are currently dominated by a single pulsar: PSR J1909-3744. The upper bound with this pulsar alone alrea... moredy cuts into the range of tenable theoretical models. Further reducing the amplitude bound (by continued regular observations of this pulsar) will significantly narrow that range. The first evidence of gravitational waves in the pulsar data are likely to be observed in the timing for PSR J1909-3744, but with only a single pulsar we will not be able to make an unambiguous detection. However, knowledge of the likely signal strength (derived from this pulsar) will help to optimise the observing strategy for the detection of the gravitational wave signals with existing or future pulsar timing arrays. less
Astronomical and Space Sciences not elsewhere classified
01 Apr 2020
30 Sep 2020
Creative Commons Attribution 4.0 International Licence
Hobbs, George; Manchester, Dick; Sarkissian, John; Bailes, Matthew; Bhat, Ramesh; Keith, Michael; Coles, William; van Straten, Willem; Toomey, Lawrence; Russell, Chris; You, xiaopeng; Ravi, Vikram; Oslowski, Stefan; Kerr, Matthew; Dempsey, James; Shannon, Ryan; Wang, Jingbo; Wen, Linqing; Zhu, Xingjiang; Dai, Shi; Lasky, Paul; Burke, Sarah; Reardon, Daniel John; Zhang, Lei; Rosado, Pablo; Spiewak, Renee ; Parthasarathy, Aditya (2020): Parkes observations for project P895 semester 2020APRS_02. v1. CSIRO. Data Collection.
All Rights (including copyright) CSIRO 2020.
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Australia Telescope National Facility
P895 - Where are the gravitational waves?
Einstein’s theory of general relativity predicts that supermassive binary black holes will produce waves in space and time that are known as gravitational waves. With the observations carried out for this project we aim to carry out the most sensitive search yet undertaken for such waves. We expect that before the year 2017 we will either have ev... moreidence for such waves or placed such stringent constraints that our understanding of galaxy evolution and cosmology will need a significant change. For this project we will observe one pulsar, PSR J1909-3744, which is the most precisely observed pulsar. To date we can predict the arrival times of pulses from this pulsar to better than 100ns and we’re using this exquisite precision to search for the elusive waves. less
Willem van Straten
Daniel John Reardon
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