منابع مشابه
Reviewing Pulsar Spectra
Pulsar research must be considered 35 years after the detection of pulsars a mature science, where the basic questions have been raised and discussed. One would hope that many if not all generic and important problems have found some kind of answer and that scientific work can concentrate now on specific details requiring more in depth investigation. We know, however, that this picture is not t...
متن کاملAnomalous X-ray Pulsar 1E 1048.1–5937: Pulsed Flux Flares and Large Torque Variations
We report on continued monitoring of the Anomalous X-ray pulsar (AXP) 1E 1048.1–5937 using the Rossi X-ray Timing Explorer. We confirm that this pulsar has exhibited significant pulsed flux variability. The principal features of this variability are two pulsed X-ray flares. Both flares lasted several months and had well-resolved few-week–long rises. The long rise times of the flares are a pheno...
متن کاملPulsar spectra of radio emission
We have collected pulsar flux density observations and compiled spectra of 281 objects. The database of Lorimer et al. (1995) has been extended to frequencies higher than 1.4 GHz and lower than 300 MHz. Our results show that above 100 MHz the spectra of the majority of pulsars can be described by a simple power law with average value of spectral index < α >= −1.8 ± 0.2. A rigorous analysis of s...
متن کاملInterstellar modulation of the flux density and arrival time of pulses from pulsar
Observations of the millisecond pulsar B1937+214 made at Nançay over 6 years show 30% rms flux variations over 13± 4 days due to Refractive Interstellar Scintillations. The arrival times (TOA) also show variations over a similar time scale 16 ± 10 days with an rms amplitude of about 0.3μsecs. These “rapid” TOA variations are anti-correlated (∼ −40%) with the flux and so are also caused by propa...
متن کاملElectric field representation of pulsar intensity spectra
Pulsar dynamic spectra exhibit high visibility fringes arising from interference between scattered radio waves. These fringes may be random or highly ordered patterns, depending on the nature of the scattering or refraction. Here we consider the possibility of decomposing pulsar dynamic spectra – which are intensity measurements – into their constituent scattered waves, i.e. electric field comp...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1973
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/165.2.133