Click here to view this collection in the new DAP user interface
Parkes observations for project P965 semester 2018APRS_01
The deployment of the new ultra-wide-band receiver UWL enables a plethora of experiments which were previously not possible or very difficult. One immediate benefit for pulsar timing studies is the significantly increased ratio of available radio frequency bandwidth to the decorrelation bandwidth as induced by the ionised interstellar medium (ISM).... more PSR J1933-6211 is a strongly-scintillating millisecond pulsar. Due to its scintillation, previous studies failed to measure the mass and orbital parameters of this system and instead provided limits. With the UWL we expect more reliable detection of bright scintles during every observation; and hence improved and reliable timing precision that will allow a mass measurement through Shapiro-Delay detection. As an additional benefit, we can use the broad band to adequately study the scintillation properties of this pulsar and thereby constrain its orbital inclination.
The mass of the pulsar is potentially the lowest known, depending on the type of its white dwarf companion. By measuring it we will also determine the type of the white dwarf which is interesting in its own right and is one of the coolest such objects known (Antoniadis, priv. comm.). Finally, we will verify if, as we expect, the precision attainable with the increased bandwidth is sufficient for high-precision pulsar timing and inclusion of PSR J1933-6211 in pulsar timing array experiments. less
Astronomical and Space Sciences not elsewhere classified
01 Aug 2018
17 Aug 2018
compact binaries and/or black-holes
interstellar medium in and around the Milky Way
Creative Commons Attribution 4.0 International Licence
Oslowski, Stefan; Verbiest, Joris P.W. (2018): Parkes observations for project P965 semester 2018APRS_01. v1. CSIRO. Data Collection.
All Rights (including copyright) CSIRO 2018.
The metadata and files (if any) are available to the public.
Australia Telescope National Facility
P965 - Wideband timing observations of J1933-6211
We are observing the millisecond pulsar J1933-6211. It is a city-sized compact object left after a star heavier than our Sun finished producing energy in its core and collapsed. We can see the star emitting radio waves in two beams that sweep past Earth, like the beams of a light house. We are hoping to measure the mass and determine the orbit of t... morehe pulsar by measuring an addition to the travel path of the photons. This extra delay (the so-called "Shapiro Delay") is caused by the space-time deformation of the companion, which was first predicted by Einstein.
This project is made possible by continual development and deployment of new and improved hardware at the Parkes Radio Telescope. It would have been very difficult with the previous generation of instrumentation. In this way, the famous Dish remains competitive decades after its construction. Somehow, it's like we have a new telescope every decade, with new abilities and scientific powers. less
Joris P.W. Verbiest
Others were also interested in