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Showing results for: [ Dempsey, James ]
This proposal relates to time purchased by the Chinese Academy of Sciences for Parkes follow-up confirmation and timing of FAST discoveries. As the observing time has been purchased this proposal (an... mored the related PX500) does not require TAC grading. The primary reason for submitting a proposal is to ensure an outreach statement and that the proposal is entered into OPAL for the data archive to access. The Chinese team have two time requests. The time scheduled for the first (PX500) will be allocated in blocks of 24 hours and the data will become available in the data archive with an 18 month embargo period. The second type of time (relating to this proposal) will be scheduled in shorter blocks and the data archived with a 10 year embargo.less
Australia Telescope National Facility - PX501 - FAST: category 2 purchased time - Published 15 Jan 2020
This proposal relates to time purchased by the Chinese Academy of Sciences for Parkes follow-up confirmation and timing of FAST discoveries. As the observing time has been purchased this proposal (an... mored the related PX501) does not require TAC grading. The primary reason for submitting a proposal is to ensure an outreach statement and that the proposal is entered into OPAL for the data archive to access. The Chinese team have two time requests. The time scheduled for the first, relating to this proposal, will be allocated in blocks of 24 hours and the data will become available in the data archive with an 18 month embargo period. The second type of time will be scheduled in shorter blocks and the data archived with a 10 year embargo.less
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 08 Jan 2020
Australia Telescope National Facility - PX501 - FAST: category 2 purchased time - Published 02 Jan 2020
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 30 Dec 2019
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 o... moreur understanding of Solar-system dynamics. The PPTA is the oldest of three international pulsar timing groups. We have the smallest telescope and the smallest group, but the best measurements and the best results. Our bound on the strength of the incoherent gravitational wave background is the only bound which significantly constrains theoretical models. We have maintained our leading position because: we have the southern sky; we have a small but well-focussed group; we have the best-calibrated receivers; and we have been able to observe with an almost regular cadence of 15 to 20 days over a wide bandwidth. With this proposal we aim to maintain our pre-eminent position in the field. Unlike most observing proposals, this is a continuing proposal for which the observations will continue to improve bounds on ultra-low-frequency gravitational waves until they are finally detected. 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 we will want to continue observations in support of the nascent field of gravitational wave astronomy!less
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 29 Dec 2019
Australia Telescope National Facility - PX501 - FAST: category 2 purchased time - Published 21 Dec 2019
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 19 Dec 2019
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 12 Dec 2019
Australia Telescope National Facility - PX501 - FAST: category 2 purchased time - Published 18 Nov 2019
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 17 Nov 2019
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 th... moree amplitude of the gravitational wave signal are currently dominated by a single pulsar: PSR J1909-3744. The upper bound with this pulsar alone already 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
Australia Telescope National Facility - P895 - Where are the gravitational waves? - Published 15 Nov 2019
Australia Telescope National Facility - PX501 - FAST: category 2 purchased time - Published 15 Nov 2019
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 13 Nov 2019
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 12 Nov 2019
Australia Telescope National Facility - PX501 - FAST: category 2 purchased time - Published 08 Nov 2019
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 07 Nov 2019
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 04 Nov 2019
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 31 Oct 2019
This collection contains data from the Parkes Pulsar Timing Array (PPTA) project. This project makes use of observations of radio pulsars from the CSIRO Parkes radio telescope. The project has three m... moreain goals: 1) detecting gravitational waves, 2) developing a pulsar-based time standard and 3) searching for unknown objects in our solar system. The data provided here is the second data release from the PPTA project. It contains pulse arrival times and timing models for 26 millisecond pulsars.less
ATNF Science – Astronomy Research - - Published 31 Oct 2019
Australia Telescope National Facility - P456 - A millisecond pulsar timing array - Published 29 Oct 2019
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 24 Oct 2019
Australia Telescope National Facility - PX501 - FAST: category 2 purchased time - Published 17 Oct 2019
Australia Telescope National Facility - PX500 - FAST: category 1 purchased time - Published 16 Oct 2019
Australia Telescope National Facility - P895 - Where are the gravitational waves? - Published 15 Oct 2019
