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Long-term Radio Observations of the Intermittent Pulsar B1931+24
N. J. Young, B. W. Stappers, A. G. Lyne +3
We present an analysis of approximately 13-yr of observations of the intermittent pulsar B1931+24 to further elucidate its behaviour. We find that while the source exhibits a wide…
New tests of local Lorentz invariance and local position invariance of gravity with pulsars
Lijing Shao, Norbert Wex, Michael Kramer
New tests are proposed to constrain possible deviations from local Lorentz invariance and local position invariance in the gravity sector. By using precise timing results of two bi…
Binary Millisecond Pulsar Discovery via Gamma-Ray Pulsations
H. J. Pletsch, L. Guillemot, H. Fehrmann +150
Millisecond pulsars, old neutron stars spun-up by accreting matter from a companion star, can reach high rotation rates of hundreds of revolutions per second. Until now, all such "…
Probing gravitation with pulsars
Michael Kramer
Radio pulsars are fascinating and extremely useful objects. Despite our on-going difficulties in understanding the details of their emission physics, they can be used as precise co…
Recycling Pulsars: spins, masses and ages
T. M. Tauris, M. Kramer, N. Langer
Although the first millisecond pulsars (MSPs) were discovered 30 years ago we still do not understand all details of their formation process. Here, we present new results from Taur…
New Constraints on Preferred Frame Effects from Binary Pulsars
Lijing Shao, Norbert Wex, Michael Kramer
Preferred frame effects (PFEs) are predicted by a number of alternative gravity theories which include vector or additional tensor fields, besides the canonical metric tensor. In t…
Broadband nulling behaviour of PSR B2319+60
Vishal Gajjar, B. C. Joshi, M. Kramer
Pulse nulling is one of many single pulse phenomena exhibited by radio pulsars. The broadband nature of this phenomena remained unexplained due to lack of coordinated observations.…
PSR J1838-0537: Discovery of a young, energetic gamma-ray pulsar
H. J. Pletsch, L. Guillemot, B. Allen +12
We report the discovery of PSR J1838-0537, a gamma-ray pulsar found through a blind search of data from the Fermi Large Area Telescope (LAT). The pulsar has a spin frequency of 6.9…
Tests of the universality of free fall for strongly self-gravitating bodies with radio pulsars
Paulo C. C. Freire, Michael Kramer, Norbert Wex
In this paper, we review tests of the strong equivalence principle (SEP) derived from pulsar-white dwarf data. The extreme difference in binding energy between both components and…
Formation of millisecond pulsars with CO white dwarf companions - II. Accretion, spin-up, true ages and comparison to MSPs with He white dwarf companions
Thomas M. Tauris, Norbert Langer, Michael Kramer
Millisecond pulsars (MSPs) are mainly characterised by their spin periods, B-fields and masses - quantities which are largely affected by previous interactions with a companion sta…
Radio Searches of Fermi LAT Sources and Blind Search Pulsars: The Fermi Pulsar Search Consortium
P. S. Ray, A. A. Abdo, D. Parent +29
We present a summary of the Fermi Pulsar Search Consortium (PSC), an international collaboration of radio astronomers and members of the Large Area Telescope (LAT) collaboration, w…
Pulsar Spin--Velocity Alignment: Further Results and Discussion
Aristeidis Noutsos, Michael Kramer, Paul Carr +1
The reported alignment between the projected spin-axes and proper motion directions of pulsars is revisited in the light of new data from Jodrell Bank and Effelsberg. The present i…
The relativistic pulsar-white dwarf binary PSR J1738+0333 II. The most stringent test of scalar-tensor gravity
Paulo C. C. Freire, Norbert Wex, Gilles Esposito-Farèse +7
(abridged) We report the results of a 10-year timing campaign on PSR J1738+0333, a 5.85-ms pulsar in a low-eccentricity 8.5-hour orbit with a low-mass white dwarf companion (...) T…
The optimal schedule for pulsar timing array observations
K. J. Lee, C. G. Bassa, R. Karuppusamy +3
In order to maximize the sensitivity of pulsar timing arrays to a stochastic gravitational wave background, we present computational techniques to optimize observing schedules. The…
The relativistic pulsar-white dwarf binary PSR J1738+0333 I. Mass determination and evolutionary history
J. Antoniadis, M. H. van Kerkwijk, D. Koester +5
PSR J1738+0333 is one of the four millisecond pulsars known to be orbited by a white dwarf companion bright enough for optical spectroscopy. Of these, it has the shortest orbital p…
Multi-wavelength Observations of the Radio Magnetar PSR J1622-4950 and Discovery of its Possibly Associated Supernova Remnant
Gemma E. Anderson, B. M. Gaensler, Patrick O. Slane +29
We present multi-wavelength observations of the radio magnetar PSR J1622-4950 and its environment. Observations of PSR J1622-4950 with Chandra (in 2007 and 2009) and XMM (in 2011)…
Constraining the optical emission from the double pulsar system J0737-3039
F. R. Ferraro, R. P. Mignani, C. Pallanca +10
We present the first optical observations of the unique system J0737-3039 (composed of two pulsars, hereafter PSR-A and PSR-B). Ultra-deep optical observations, performed with the…
The Double Pulsar Eclipses I: Phenomenology and Multi-frequency Analysis
R. P. Breton, V. M. Kaspi, M. A. McLaughlin +7
The double pulsar PSR J0737-3039A/B displays short, 30 s eclipses that arise around conjunction when the radio waves emitted by pulsar A are absorbed as they propagate through the…