Zobrazeno 1 - 10
of 175
pro vyhledávání: '"Kijak, J."'
Publikováno v:
ApJ, 2021, 922, 125
We report the detailed spectral measurements over a wide frequency range of three pulsars: J1741-3016, J1757-2223 and J1845-0743, using the Giant Metrewave Radio Telescope, which allowed us to identify them as a new gigahertz-peaked spectra pulsars.
Externí odkaz:
http://arxiv.org/abs/2109.04816
Autor:
Rozko, K., Kijak, J., Chyzy, K., Lewandowski, W., Shimwell, T., Sridhar, S. S., Curylo, M., Krankowski, A., Blaszkiewicz, L.
Publikováno v:
The Astrophysical Journal, 2020, Volume 903, Issue 2, id.144, 6 pp
In this paper we present recent Low Frequency Array (LOFAR) observations of the pulsar J1740+1000. We confirm that its spectrum has a turnover at 260 MHz, which is unusual for a typical pulsar. We argue that in this case interferometric imaging provi
Externí odkaz:
http://arxiv.org/abs/2104.00397
Publikováno v:
Astrophysics and Space Science, Volume 363, Issue 7, article id. 141, 12 pp. (2018)
We present the results of modelling of the radio spectrum evolution and dispersion measure variations of PSR B1259-63, a pulsar in a binary system with Be star LS 2883. We base our model on a hypothesis that the observed variations of the spectrum ar
Externí odkaz:
http://arxiv.org/abs/1809.05658
We report the multi-frequency observations of two pulsars: J1740+1000 and B1800-21, using the Giant Metrewave Radio Telescope and the Green Bank Telescope. The main aim of these observations was to estimate the flux density spectrum of these pulsars,
Externí odkaz:
http://arxiv.org/abs/1806.07128
We present the results of our radio interferometric observations of pulsars at 325 MHz and 610 MHz using the Giant Metrewave Radio Telescope (GMRT). We used the imaging method to estimate the flux densities of several pulsars at these radio frequenci
Externí odkaz:
http://arxiv.org/abs/1704.08494
We conducted radio interferometric observations of six pulsars at 610 MHz using the Giant Metrewave Radio Telescope (GMRT). All these objects were claimed or suspected to be the gigahertz-peaked spectra (GPS) pulsars. For a half of the sources in our
Externí odkaz:
http://arxiv.org/abs/1502.06758
Flux-density spectral analysis for several pulsars and two newly-identified gigahertz-peaked spectra
In this paper we present results from flux density measurements for 21 pulsars over a wide frequency range, using the Giant Metrewave Radio Telescope (GMRT) and the Effelsberg telescope. Our sample was a set of mostly newly discovered pulsars from th
Externí odkaz:
http://arxiv.org/abs/1409.3461
We present results of the analysis of interstellar scintillation in PSR B0823+26. Observations were conducted at a frequency of 1.7 GHz using the 32-m Torun Centre for Astronomy radio telescope. More than 50 observing sessions, lasting on average 10
Externí odkaz:
http://arxiv.org/abs/1310.8076
We study the radio spectra of two magnetars PSR J1550-5418 and J1622-4950. We argue that they are good candidates for the pulsars with gigahertz-peaked spectra as their observed flux density decreases at frequencies below 7 GHz. We suggest this behav
Externí odkaz:
http://arxiv.org/abs/1305.5346
Aims. To investigate the flux density modulation from pulsars and the existence of specific behaviour of modulation index versus frequency. Methods. Several pulsars have been observed with the Effelsberg radio telescope at 8.35 GHz. Their flux densit
Externí odkaz:
http://arxiv.org/abs/1304.6807