494 citations · 2.4k across the 21 of their papers we have counts for
20 papers
An emission state switching radio transient with a 54 minute period
M. Caleb, E. Lenc, D. L. Kaplan +19
Long-period radio transients are an emerging class of extreme astrophysical events of which only three are known. These objects emit highly polarised, coherent pulses of typically…
Radio observations of two intermittent pulsars: PSRs J1832+0029 and J1841-0500
S. Q. Wang, J. B. Wang, G. Hobbs +8
We present long-term observations of two intermittent pulsars, PSRs~J1832+0029 and J18410500 using the Parkes 64\,m radio telescope. The radio emission for these pulsars switche…
Commensal discovery of four Fast Radio Bursts during Parkes Pulsar Timing Array observations
S. Osłowski, R. M. Shannon, V. Ravi +25
The Parkes Pulsar Timing Array (PPTA) project monitors two dozen millisecond pulsars (MSPs) in order to undertake a variety of fundamental physics experiments using the Parkes 64m…
Comparison of Pulsar Positions from Timing and Very Long Baseline Astrometry
J. B. Wang, W. A. Coles, G. Hobbs +22
Pulsar positions can be measured with high precision using both pulsar timing methods and very-long-baseline interferometry (VLBI). Pulsar timing positions are referenced to a sola…
Wide-band Profile Domain Pulsar Timing Analysis
L. Lentati, M. Kerr, S. Dai +22
We extend profile domain pulsar timing to incorporate wide-band effects such as frequency-dependent profile evolution and broadband shape variation in the pulse profile. We also in…
Gravitational-wave cosmology across 29 decades in frequency
Paul D. Lasky, Chiara M. F. Mingarelli, Tristan L. Smith +24
Quantum fluctuations of the gravitational field in the early Universe, amplified by inflation, produce a primordial gravitational-wave background across a broad frequency band. We…
Versatile Directional Searches for Gravitational Waves with Pulsar Timing Arrays
D. R. Madison, X. -J. Zhu, G. Hobbs +23
By regularly monitoring the most stable millisecond pulsars over many years, pulsar timing arrays (PTAs) are positioned to detect and study correlations in the timing behaviour of…
Timing analysis for 20 millisecond pulsars in the Parkes Pulsar Timing Array
D. J. Reardon, G. Hobbs, W. Coles +18
We present timing models for 20 millisecond pulsars in the Parkes Pulsar Timing Array. The precision of the parameter measurements in these models has been improved over earlier re…
Gravitational waves from binary supermassive black holes missing in pulsar observations
R. M. Shannon, V. Ravi, L. T. Lentati +19
Gravitational waves are expected to be radiated by supermassive black hole binaries formed during galaxy mergers. A stochastic superposition of gravitational waves from all such bi…
A Study of Multi-frequency Polarization Pulse Profiles of Millisecond Pulsars
S. Dai, G. Hobbs, R. N. Manchester +23
We present high signal-to-noise ratio, multi-frequency polarization pulse profiles for 24 millisecond pulsars that are being observed as part of the Parkes Pulsar Timing Array (PPT…
An all-sky search for continuous gravitational waves in the Parkes Pulsar Timing Array data set
X. -J. Zhu, G. Hobbs, L. Wen +16
We present results of an all-sky search in the Parkes Pulsar Timing Array (PPTA) Data Release 1 data set for continuous gravitational waves (GWs) in the frequency range from $5\tim…
Limitations in timing precision due to single-pulse shape variability in millisecond pulsars
R. M. Shannon, S. Osłowski, S. Dai +17
High-sensitivity radio-frequency observations of millisecond pulsars usually show stochastic, broadband, pulse-shape variations intrinsic to the pulsar emission process. These vari…
Prospects for gravitational-wave detection and supermassive black hole astrophysics with pulsar timing arrays
V. Ravi, J. S. B. Wyithe, R. M. Shannon +1
Large-area sky surveys show that massive galaxies undergo at least one major merger in a Hubble time. Ongoing pulsar timing array (PTA) experiments are aimed at measuring the gravi…
Binary super-massive black hole environments diminish the gravitational-wave signal in the pulsar timing band
V. Ravi, J. S. B. Wyithe, R. M. Shannon +2
We assess the effects of super-massive black hole (SMBH) environments on the gravitational-wave (GW) signal from binary SMBHs. To date, searches with pulsar timing arrays for GWs f…
Measurement and correction of variations in interstellar dispersion in high-precision pulsar timing
M. J. Keith, W. Coles, R. M. Shannon +16
Signals from radio pulsars show a wavelength-dependent delay due to dispersion in the interstellar plasma. At a typical observing wavelength, this delay can vary by tens of microse…
Detection of 107 glitches in 36 southern pulsars
M. Yu, R. N. Manchester, G. Hobbs +9
Timing observations from the Parkes 64-m radio telescope for 165 pulsars between 1990 and 2011 have been searched for period glitches. A total of 107 glitches were identified in 36…
Development of a pulsar-based timescale
G. Hobbs, W. Coles, R. N. Manchester +21
Using observations of pulsars from the Parkes Pulsar Timing Array (PPTA) project we develop the first pulsar-based timescale that has a precision comparable to the uncertainties in…
Observations and modelling of pulsed radio emission from CU Virginis
K. K. Lo, J. D. Bray, G. Hobbs +6
We present 13 cm and 20 cm radio observations of the magnetic chemically peculiar star CU Virginis taken with the Australia Telescope Compact Array. We detect two circularly polari…
The non-uniform, dynamic atmosphere of Betelgeuse observed at mid-infrared wavelengths
V. Ravi, E. H. Wishnow, C. H. Townes +3
We present an interferometric study of the continuum surface of the red supergiant star Betelgeuse at 11.15 microns wavelength, using data obtained with the Berkeley Infrared Spati…
Wide radio beams from gamma-ray pulsars
V. Ravi, R. N. Manchester, G. Hobbs
We investigate the radio and gamma-ray beaming properties of normal and millisecond pulsars by selecting two samples from the known populations. The first, Sample G, contains pulsa…