Results 41 to 50 of about 13,579 (182)
The optimal schedule for pulsar timing array observations
, 2012 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 techniques are applicable to both single and multi-telescope experiments.
Bassa, C. G. +6 more
core +1 more source
Strong-Field Gravity Tests with the Double Pulsar
Physical Review X, 2021 Continued timing observations of the double pulsar PSR J0737–3039A/B, which consists of two active radio pulsars (A and B) that orbit each other with a period of 2.45 h in a mildly eccentric (e=0.088) binary system, have led to large improvements in the ...
M. Kramer +29 more
doaj +1 more source
Have pulsar timing array methods detected a cosmological phase transition?
Physical Review DWe show that the recent detection of a gravitational wave (GW) background reported by various pulsar timing array (PTA) collaborations including NANOGrav-15yr, PPTA, EPTA, and CPTA can be explained in terms of first order phase transitions (FOPTs) from dark sector models (DSM).
Andrea Addazi +3 more
openaire +2 more sources
PSR J1838−0655: X-Ray Observations with NICER and NuSTAR
The Astrophysical JournalWe report on the timing and spectral properties of PSR J1838-0655 using joint observations from the Neutron Star Interior Composition Explorer (NICER) and the Nuclear Spectroscopic Telescope Array (NuSTAR). By disentangling the pulsar’s emission from its
Xian-Ao Wang +7 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 The noise in millisecond pulsar (MSP) timing data can include contributions from observing instruments, the interstellar medium, the solar wind, solar system ephemeris errors, and the pulsars themselves.
Daniel J. Reardon +21 more
doaj +1 more source
Search for an Isotropic Gravitational-wave Background with the Parkes Pulsar Timing Array
The Astrophysical Journal Letters, 2023 Pulsar timing arrays aim to detect nanohertz-frequency gravitational waves (GWs). A background of GWs modulates pulsar arrival times and manifests as a stochastic process, common to all pulsars, with a signature spatial correlation.
Daniel J. Reardon +28 more
doaj +1 more source
Rapid construction of joint pulsar timing array data sets: the Lite method
Monthly Notices of the Royal Astronomical SocietyABSTRACT The International Pulsar Timing Array (IPTA)’s second data release (IPTA DR2) combines decades of observations of 65 millisecond pulsars from 7 radio telescopes. IPTA data sets should be the most sensitive data sets to nanohertz gravitational waves (GWs), but take years to assemble, often excluding valuable recent data.
B Larsen +43 more
openaire +3 more sources
Profile instabilities of the millisecond pulsar PSR J1022+1001 [PDF]
, 1999 We present evidence that the integrated profiles of some millisecond pulsars exhibit severe changes that are inconsistent with the moding phenomenon as known from slowly rotating pulsars.
Christoph Lange +17 more
core +2 more sources
Decade-long Timing of Four GMRT Discovered Millisecond Pulsars
The Astrophysical JournalThe discovery and timing follow up of millisecond pulsars (MSPs) are necessary not just for their usefulness in pulsar timing arrays (PTAs) but also for investigating their own intriguing properties.
Shyam S. Sharma +3 more
doaj +1 more source
Long-term Timing Evolution of Four Anomalous X-Ray Pulsars
The Astrophysical JournalAnomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs) are believed to be manifestations of magnetars. Typically, AXPs exhibit higher X-ray luminosities, whereas SGRs are generally fainter and display significantly high signal-to-noise ratios
Han-Long Peng +11 more
doaj +1 more source