منابع مشابه
A New Search Technique for Short Orbital Period Binary Pulsars
We describe a new and efficient technique which we call sideband or phasemodulation searching that allows one to detect short period binary pulsars in observations longer than the orbital period. The orbital motion of the pulsar during long observations effectively modulates the phase of the pulsar signal causing sidebands to appear around the pulsar spin frequency and its harmonics in the Four...
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Modified versions of two “standard” pulsar search techniques are presented that allow large-scale searches for pulsations in long duration high-energy data sets using relatively modest amounts of computer time. For small numbers of photons (Nphot ∼< 10 ), optimized brute-force epoch folding searches are preferred. For larger numbers of photons, advanced Fourier domain acceleration searches are ...
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We present results from a survey for fast pulsars at the Arecibo Observatory. Approximately 260 square degrees of sky were searched, primarily at Galactic latitude jbj < 8. Signals were sampled at intervals of 517 s, allowing for the possibility of detecting pulsars with periods as short as 1 ms or less. Sensitivity varied as a function of sky position. In a typical direction, long period pulsa...
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Pulsar mode data from the Oriented Scintillation Spectrometer Experiment (OSSE) onboard the Compton Gamma Ray Observatory, with time resolution between 125 s and 8 ms, have been analyzed for the presence of short period -ray pulsations. Observations of known point sources (including SN1987A, SN1993J, GROJ0422+32, and several pulsars) and of regions where high densities of pulsars are expected (...
متن کاملAdaptive search area for fast motion estimation
In this paper a new method for determining the search area for motion estimation algorithm based on block matching is suggested. In the proposed method the search area is adaptively found for each block of a frame. This search area is similar to that of the full search (FS) algorithm but smaller for most blocks of a frame. Therefore, the proposed algorithm is analogous to FS in terms of reg...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2000
ISSN: 0252-9211
DOI: 10.1017/s0252921100058978