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Pulse arrival time measurements over fourteen years with the Nanshan 25-m and Parkes 64-m radio telescopes have been used to determine the average profile and timing properties for PSR J1757$-$2421 (B1754$-$24). Analysis of the radio…

High Energy Astrophysical Phenomena · Physics 2017-01-18 J. P. Yuan , R. N. Manchester , N. Wang , J. B. Wang , X. Zhou , W. M. Yan , Z. Y. Liu

X-ray pulsations with a 6.85 s period were recently detected in the SMC and were subsequently identified as originating from the Be/X-ray binary system XTE J0103-728. The recent localization of the source of the X-ray emission has made a…

Solar and Stellar Astrophysics · Physics 2009-11-13 F. Crawford , D. R. Lorimer , B. M. Devour , B. P. Takacs , V. I. Kondratiev

We observed PSR B1259-63, a young non-accreting pulsar orbiting around a Be star SS 2883, eight times with the Suzaku satellite in 2007, to characterize the X-ray emission arising from the interaction between a pulsar relativistic wind and…

High Energy Astrophysical Phenomena · Physics 2011-02-11 Yasunobu Uchiyama , Takaaki Tanaka , Tadayuki Takahashi , Koji Mori , Kazuhiro Nakazawa

IGR J17511-3057 is the second X-ray transient accreting millisecond pulsar discovered by INTEGRAL. It was in outburst for about a month from September 13, 2009. The broad-band average spectrum is well described by thermal Comptonization…

High Energy Astrophysical Phenomena · Physics 2011-07-18 M. Falanga , L. Kuiper , J. Poutanen , D. K. Galloway , E. W. Bonning , E. Bozzo , A. Goldwurm , W. Hermsen , L. Stella

We report the observations of single pulse emission from the pulsar B0809+74 at 150 MHz using the Polish LOFAR station, PL-611. The three major phenomena of subpulse drifting, nulling and mode changing associated with single pulse…

High Energy Astrophysical Phenomena · Physics 2023-09-08 Rahul Basu , Wojciech Lewandowski , Jarosław Kijak , Bartosz Śmierciak , Marian Soida , Leszek Błaszkiewicz , Andrzej Krankowski

We report the discovery of two young isolated radio pulsars with very high inferred magnetic fields. PSR J1119-6127 has period P = 0.407 s, and the largest period derivative known among radio pulsars, Pdot = 4.0e-12. Under standard…

Pulsars with periods more than 0.4 seconds in the declination range -9o < decj < 42o and in the right ascension range 0h < r.a.< 24h were searched in parallel with the program of interplanetary scintillations monitoring of a large number of…

ASCA's long look at the 288 millisecond radio pulsar, PSR J0631+1036, reveals coherent X-ray pulsation from this source for the first time. The source was first detected in the serendipitous Einstein observation and later identified as a…

One of the tenets of the radio pulsar observational picture is that the integrated pulse profiles are constant with time. This assumption underpins much of the fantastic science made possible via pulsar timing. Over the past few years,…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Aris Karastergiou , Steve J. Roberts , Simon Johnston , Hyoung-joo Lee , Patrick Weltevrede , Michael Kramer

Lyne & Manchester (1988) identified a group of some 50 pulsars they called "partial cones" which they found difficult to classify and interpret. They were notable for their asymmetric average profiles and asymmetric polarization…

Astrophysics of Galaxies · Physics 2015-05-20 Dipanjan Mitra , Joanna. M. Rankin

The survey of northern hemisphere were made at a frequency of 111 MHz. The total accumulation time at each point of the sky was at least one hour. 75 sources of pulse emission were detected. More then 80% of these sources are known pulsars…

High Energy Astrophysical Phenomena · Physics 2022-04-12 S. A. Tyul'bashev , M. A. Kitaeva , S. V. Logvinenko , G. E. Tyul'basheva

We have completed part of a program to study the X-ray emission properties of old rotation-powered pulsars with XMM-Newton in order to probe and identify the origin of their X-radiation. The X-ray emission from these old pulsars is largely…

Although originally discovered as a radio-quiet gamma-ray pulsar, J1732-3131 has exhibited intriguing detections at decameter wavelengths. We report an extensive follow-up of the pulsar at 327 MHz with the Ooty radio telescope. Using the…

High Energy Astrophysical Phenomena · Physics 2017-08-09 Yogesh Maan , M. A. Krishnakumar , Arun K. Naidu , Subhashis Roy , Bhal Chandra Joshi , Matthew Kerr , P. K. Manoharan

PSR J1825$-$0935 (PSR B1822$-$09) switches between radio-quiet (Q-mode) and radio-bright (B-mode) modes. The Q-mode is known to have a periodic fluctuation that modulates both the interpulse and the main pulse with the same period. Earlier…

High Energy Astrophysical Phenomena · Physics 2019-03-13 W. M. Yan , R. N. Manchester , N. Wang , J. P. Yuan , Z. G. Wen , K. J. Lee

We have investigated the radio polarization properties of PSR J1119-6127, a recently discovered young radio pulsar with a large magnetic field. Using pulsar-gated radio imaging data taken at a center frequency of 2496 MHz with the Australia…

Astrophysics · Physics 2009-11-07 Fronefield Crawford , Nathan C. Keim

Microstructure emission, involving short time scale, often quasi-periodic, intensity fluctuations in subpulse emission, is well known in normal period pulsars. In this letter, we present the first detections of quasi-periodic microstructure…

High Energy Astrophysical Phenomena · Physics 2016-12-06 Kishalay De , Yashwant Gupta , Prateek Sharma

We have analyzed single pulses from PSR J0737-3039B, the 2.8-s pulsar in the recently discovered double pulsar system, using data taken with the Green Bank Telescope at 820 and 1400 MHz. We report the detection of features similar to…

The Crab Nebula and the Pulsar have been pointed several times by the BeppoSAX satellite. We analysed all these observations, summed together, to study the main spectral properties with a good phase resolution. A new accurate estimate of…

Astrophysics · Physics 2007-05-23 E. Massaro , G. Cusumano , M. Litterio , T. Mineo

We report the detection of pulsed gamma-ray emission from the fast millisecond pulsars (MSPs) B1937+21 (also known as J1939+2134) and B1957+20 (J1959+2048) using 18 months of survey data recorded by the \emph{Fermi} Large Area Telescope…

A number of previous papers have developed an ion-proton theory of the pulsar polar cap. The basic equations summarizing this are given here with the results of sets of model step-to-step calculations of pulse-precursor profiles. The nature…

High Energy Astrophysical Phenomena · Physics 2020-01-08 P B Jones
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