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PSR J1757$-$1854 is one of the most relativistic double neutron star binary systems known in our Galaxy, with an orbital period of $P_\text{b}=4.4\,\text{hr}$ and an orbital eccentricity of $e=0.61$. As such, it has promised to be an…

High Energy Astrophysical Phenomena · Physics 2023-06-28 A. D. Cameron , M. Bailes , D. J. Champion , P. C. C. Freire , M. Kramer , M. A. McLaughlin , C. Ng , A. Possenti , A. Ridolfi , T. M. Tauris , H. M. Wahl , N. Wex

We present an investigation of the morphology and arrival times of integrated radio pulses from the binary millisecond pulsar PSR J1022+1001. This pulsar is renowned for its poor timing properties, which have been postulated to originate…

Astrophysics · Physics 2016-08-30 A. W. Hotan , M. Bailes , S. M. Ord

Rotation Measure synthesis (RM synthesis) of the Westerbork Synthesis Radio Telescope (WSRT) observations at 2 m wavelength of the FAN region at l=137deg, b=+7deg shows the morphology of structures in the ionized interstellar medium. We…

Astrophysics of Galaxies · Physics 2015-06-11 Marco Iacobelli , Marijke Haverkorn , Peter Katgert

We present a radio polarization study of the supernova remnant CTB 80 based on images at 1420 MHz from the Canadian Galactic plane survey, at 2695 MHz from the Effelsberg survey of the Galactic plane, and at 4800 MHz from the Sino-German…

Astrophysics of Galaxies · Physics 2020-12-02 Xianghua Li , Xiaohui Sun , Wolfgang Reich , Xuyang Gao

We report on radio observations of four magnetars SGR 0501+4516, Swift 1834.9-0846, 1E 1841-045, SGR 1900+14 and a magnetar-like pulsar PSR J1846-0258 with the Five-hundred-meter Aperture Spherical radio Telescope (FAST) at 1250 MHz.…

High Energy Astrophysical Phenomena · Physics 2024-12-31 Juntao Bai , Na Wang , Shi Dai , Shuangqiang Wang , Jianping Yuan , Wenming Yan , Lunhua Shang , Xin Xu , Shijun Dang , Zhen Zhang

Fast radio bursts (FRB) will become important cosmological tools, as the number of observed FRBs is increasing rapidly with more surveys being carried out. A large sample of FRBs with dispersion measures (DM) and rotation measures (RM) can…

Astrophysics of Galaxies · Physics 2024-10-02 Timea Orsolya Kovacs , Sui Ann Mao , Aritra Basu , Yik Ki Ma , Laura G. Spitler , Charles R. H. Walker

We report a 5.4\sigma\ detection of pulsed gamma rays from PSR B1821-24 in the globular cluster M28 using ~44 months of Fermi Large Area Telescope (LAT) data that have been reprocessed with improved instrument calibration constants. We…

One of the major challenges for pulsar timing array (PTA) experiments is the mitigation of the effects of the turbulent interstellar medium (ISM) from timing data. These can potentially lead to measurable delays and/or distortions in the…

We have used the Effelsberg 100-m radio telescope to conduct a 1400-MHz ($\lambda$ 21-cm) search for young and rapidly rotating radio pulsars along a 2 deg$^2$ strip of the northern Galactic plane defined by $28^{\circ} \leq l \leq…

Astrophysics · Physics 2007-05-23 D. R. Lorimer , M. Kramer , P. Mueller , N. Wex , A. Jessner , C. Lange , R. Wielebinski

We have investigated the X-ray and $\gamma$-ray properties of the redback millisecond pulsar PSR J1723-2837 with XMM-Newton, Chandra and Fermi. We have discovered the X-ray orbital modulation of this binary system with the minimum that…

High Energy Astrophysical Phenomena · Physics 2015-06-17 C. Y. Hui , P. H. T. Tam , J. Takata , A. K. H. Kong , K. S. Cheng , J. H. K. Wu , L. C. C. Lin , E. M. H. Wu

We report the discovery of ten new pulsars in the globular cluster Terzan 5 as part of the Transients and Pulsars with MeerKAT (TRAPUM) Large Survey Project. We observed Terzan 5 at L-band (856--1712 MHz) with the MeerKAT radio telescope…

We present the first section of a radio continuum and polarization survey at medium Galactic latitudes carried out with the Effelsberg 100-m telescope at 1.4 GHz. Four large fields have been observed, which all together cover an area of…

Astrophysics · Physics 2009-10-31 B. Uyaniker , E. Fuerst , W. Reich , P. Reich , R. Wielebinski

We report the discovery of PSR~J2251$-$3711, a radio pulsar with a spin period of 12.1 seconds, the second longest currently known. Its timing parameters imply a characteristic age of 15 Myr, a surface magnetic field of $1.3 \times…

I have studied the variability properties and localization of 3EG J1746-2851 based on EGRET data of the observing periods 1-4. Using corrections for know systematic problems and performing various consistency checks I find no evidence of…

Astrophysics · Physics 2007-05-23 Martin Pohl

We report on 9 months of observations of the radio-emitting anomalous X-ray pulsar XTE J1810-197 starting in 2006 May using the Nancay, Parkes, GBT, and VLA telescopes mainly at a frequency of 1.4 GHz. The torque experienced by the neutron…

Parsec-scale Faraday rotation measure (RM) maps are presented for the radio galaxies M87, 3C 111, and 3C 120. These Very Long Baseline Array observations were made at 8, 12, and 15 GHz. M87 has an extreme RM distribution that varies from…

Astrophysics · Physics 2009-11-07 R. T. Zavala , G. B. Taylor

We report observed and derived timing parameters for three millisecond pulsars (MSPs) from observations collected with the Parkes 64-m telescope, Murriyang. The pulsars were found during re-processing of archival survey data by Mickaliger…

We present the combined results of three photometric monitoring campaigns targeting very low mass (VLM) stars and brown dwarfs in the young open cluster IC4665 (age ~40 Myr). In all three runs, we observe ~100 cluster members, allowing us…

Solar and Stellar Astrophysics · Physics 2015-05-14 Alexander Scholz , Jochen Eisloeffel , Reinhard Mundt

Measurements of average pulse profiles made with a single linear polarization over the range 41-112 MHz are presented for PSR B0950+08. We show that the observed variable structure of the pulse profiles is a result of Faraday sinusoidal…

Astrophysics · Physics 2009-11-10 T. V. Shabanova , Yu. P. Shitov

The study of high-magnetic-field pulsars is important for examining the relationships between radio pulsars, magnetars, and X-ray-isolated neutron stars (XINSs). Here we report on X-ray observations of three such high-magnetic-field radio…

High Energy Astrophysical Phenomena · Physics 2013-09-18 S. A. Olausen , W. W. Zhu , J. K. Vogel , V. M. Kaspi , A. G. Lyne , C. M. Espinoza , B. W. Stappers , R. N. Manchester , M. A. McLaughlin