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相关论文: A Search for Pulsars in Steep Spectrum Radio Sourc…

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We have searched 75 unidentified radio sources selected from the NRAO VLA Sky Survey (NVSS) catalog for the presence of rapidly spinning pulsars and short, dispersed radio bursts. The sources are radio bright, have no identifications or…

太阳与恒星天体物理 · 物理学 2015-06-15 Deborah Schmidt , Fronefield Crawford , Glen Langston , Claire Gilpin

We report on a search for steep spectrum radio sources within the 95% confidence error ellipses of the Fermi unassociated sources from the Large Array Telescope (LAT). Using existing catalogs and the newly released GMRT all-sky survey at…

高能天体物理现象 · 物理学 2016-07-27 D. A. Frail , K. P. Mooley , P. Jagannathan , H. T. Intema

On the Large Phased Array (LPA) of Lebedev Physics Institute (LPI), a search for pulsars outside the Galaxy plane was carried out in a 300 sq. deg area. The search with a sensitivity 5-10 times better than that of previously conducted…

高能天体物理现象 · 物理学 2023-05-03 S. A. Tyul'bashev , G. E. Tyul'basheva

We have searched 92 unidentified sources from the FIRST and NVSS 1400 MHz radio survey catalogs for radio pulsations at 610 MHz. The selected radio sources are bright, have no identification with extragalactic objects, are point-like and…

天体物理学 · 物理学 2008-11-26 Fronefield Crawford , Victoria M. Kaspi , Jon F. Bell

Pulsars are among the most highly polarized sources in the universe. The NVSS has catalogued 2 million radio sources with linear polarization measurements, from which we have selected 253 sources, with polarization percentage greater than…

天体物理学 · 物理学 2007-05-23 J. L. Han , R. N. Manchester , A. G. Lyne , G. J. Qiao

We have used the 150 MHz radio continuum survey (TGSS ADR) from the Giant Metrewave Radio Telescope (GMRT) to search for phase-averaged emission toward all well-localized radio pulsars north of -53deg Declination. We detect emission toward…

高能天体物理现象 · 物理学 2016-10-05 D. A. Frail , P. Jagannathan , K. P. Mooley , H. T. Intema

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…

Since radio sources with Ultra Steep Spectra (USS; alpha <~ -1.30; S ~ nu^alpha) are efficient tracers of high redshift radio galaxies (HzRGs), we have defined three samples of such USS sources using the recently completed WENSS, TEXAS,…

天体物理学 · 物理学 2011-05-23 Carlos De Breuck , Wil van Breugel , Huub Rottgering , George Miley

The search of pulsars in monitoring observations being carried out for 5 years using LPA LPI radio telescope was done in 96 spatial beams covering daily 17,000 square degrees. Five new pulsars were detected. Candidates into pulsars were…

高能天体物理现象 · 物理学 2022-04-21 S. A. Tyul'bashev , M. A. Kitaeva , V. S. Tyul'bashev , V. M. Malofeev , G. E. Tyul'basheva

We have searched 92 unidentified sources from the FIRST and NVSS radio catalogs for pulsations at 610 MHz. The selected sources are bright, have no identifications, are unresolved and have significant linear polarization. Our search was…

天体物理学 · 物理学 2007-05-23 F. Crawford , V. M. Kaspi , J. F. Bell

Since 2013 round-the-clock monitoring of the sky is carried out simultaneously in 96 space beams using the high-sensitivity radio telescope of LPA (Large Phased Array) at the frequency 110.25 MHz. These observations are made under the…

高能天体物理现象 · 物理学 2018-08-15 V. M. Malofeev , S. A. Tyul'bashev

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…

天体物理学 · 物理学 2007-05-23 D. R. Lorimer , M. Kramer , P. Mueller , N. Wex , A. Jessner , C. Lange , R. Wielebinski

Detecting and studying pulsars above a few GHz in the radio band is challenging due to the typical faintness of pulsar radio emission, their steep spectra, and the lack of observatories with sufficient sensitivity operating at high…

高能天体物理现象 · 物理学 2018-06-29 Pablo Torne

We have conducted a search of 19 southern Galactic globular clusters for sub-millisecond pulsars at 660 MHz with the Parkes 64-m radio telescope. To minimize dispersion smearing we used the CPSR baseband recorder, which samples the 20 MHz…

天体物理学 · 物理学 2009-11-06 R. T. Edwards , W. van Straten , M. Bailes

A search for pulsars was carried out using a Large Phased Array (LPA) radio telescope at a frequency of 110.4 MHz with a time resolution of 3.072 ms and a frequency resolution of 19.5 kHz with a 2.5 MHz bandwidth used. The survey was…

高能天体物理现象 · 物理学 2026-01-26 S. A. Tyul'bashev , G. E. Tyul'basheva , M. A. Kitaeva

We have reprocessed a set of observations of 75 bright, unidentified, steep-spectrum polarized radio sources taken with the Green Bank 43-m telescope to find previously undetected sub-millisecond pulsars and radio bursts. The (null) results…

高能天体物理现象 · 物理学 2021-02-03 F. Crawford , J. Margeson , B. Nguyen , T. Saigal , O. Young , D. Agarwal , K. Aggarwal

We have embarked on a survey for pulsars and fast transients using the 13-beam Multibeam receiver on the Parkes radio telescope. Installation of a digital backend allows us to record 400 MHz of bandwidth for each beam, split into 1024…

The search for pulsars in a sample of pulsar candidates found based on a multi-year survey conducted with low (6 channels; sampling 0.1s) time-frequency resolution on declinations -9^o < \delta < +42^o was carried out. A Large Phased Array…

高能天体物理现象 · 物理学 2022-10-26 S. A. Tyul'bashev , M. A. Kitaeva , G. E. Tyul'basheva

Recent optical astrometric and spectroscopic surveys have identified numerous neutron star (NS) candidates in non-accreting detached binary systems, but their compact-object nature remains unconfirmed. In this work, we present targeted…

高能天体物理现象 · 物理学 2025-11-26 Shi-Jie Gao , Xiang-Dong Li , Song Wang , Kareem El-Badry , De-Jiang Zhou , Yi-Xuan Shao , Zhen Yan , Pei Wang , Ping Zhou , Jin-Lin Han

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…

高能天体物理现象 · 物理学 2022-04-12 S. A. Tyul'bashev , M. A. Kitaeva , S. V. Logvinenko , G. E. Tyul'basheva
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