Zobrazeno 1 - 10
of 351
pro vyhledávání: '"Campbell, R. M."'
Autor:
Radcliffe, J. F., Garrett, M. A., Muxlow, T. W. B., Beswick, R. J., Barthel, P. D., Deller, A. T., Keimpema, A., Campbell, R. M., Wrigley, N.
Publikováno v:
A&A 619, A48 (2018)
(Abridged) Conventional radio surveys of deep fields ordinarily have arc-second scale resolutions often insufficient to reliably separate radio emission in distant galaxies originating from star-formation and AGN-related activity. Very long baseline
Externí odkaz:
http://arxiv.org/abs/1808.04296
Autor:
Krehlik, P., Buczek, Ł., Kołodziej, J., Lipiński, M., Śliwczyński, Ł., Nawrocki, J., Nogaś, P., Marecki, A., Pazderski, E., Ablewski, P., Bober, M., Ciuryło, R., Cygan, A., Lisak, D., Masłowski, P., Morzyński, P., Zawada, M., Campbell, R. M., Pieczerak, J., Binczewski, A., Turza, K.
Publikováno v:
A&A 603, A48 (2017)
The quality of Very Long Baseline Interferometry (VLBI) radio observations predominantly relies on precise and ultra-stable time and frequency (T&F) standards, usually hydrogen masers (HM), maintained locally at each VLBI station. Here, we present an
Externí odkaz:
http://arxiv.org/abs/1703.09479
Autor:
Paragi, Z., Yang, J., Komossa, S., van der Horst, A., Gurvits, L. I., Campbell, R. M., Giannios, D., An, T.
A small fraction of Tidal Disruption Events (TDE) produce relativistic jets, evidenced by their non-thermal X-ray spectra and transient radio emission. Here we present milliarcsecond-resolution imaging results on TDE J1644+5734 with the European VLBI
Externí odkaz:
http://arxiv.org/abs/1701.06950
Autor:
Marcote, B., Paragi, Z., Hessels, J. W. T., Keimpema, A., van Langevelde, H. J., Huang, Y., Bassa, C. G., Bogdanov, S., Bower, G. C., Burke-Spolaor, S., Butler, B. J., Campbell, R. M., Chatterjee, S., Cordes, J. M., Demorest, P., Garrett, M. A., Ghosh, T., Kaspi, V. M., Law, C. J., Lazio, T. J. W., McLaughlin, M. A., Ransom, S. M., Salter, C. J., Scholz, P., Seymour, A., Siemion, A., Spitler, L. G., Tendulkar, S. P., Wharton, R. S.
The millisecond-duration radio flashes known as Fast Radio Bursts (FRBs) represent an enigmatic astrophysical phenomenon. Recently, the sub-arcsecond localization (~ 100mas precision) of FRB121102 using the VLA has led to its unambiguous association
Externí odkaz:
http://arxiv.org/abs/1701.01099
Autor:
Yang, J., Paragi, Z., van der Horst, A. J., Gurvits, L. I., Campbell, R. M., Giannios, D., An, T., Komossa, S.
The first-known tidal disruption event (TDE) with strong evidence for a relativistic jet -- based on extensive multi-wavelength campaigns -- is Swift J1644+5734. In order to directly measure the apparent speed of the radio jet, we performed very long
Externí odkaz:
http://arxiv.org/abs/1605.06461
Autor:
Keimpema, A., Kettenis, M. M., Pogrebenko, S. V., Campbell, R. M., Cimó, G., Duev, D. A., Eldering, B., Kruithof, N., van Langevelde, H. J., Marchal, D., Calvés, G. Molera, Ozdemir, H., Paragi, Z., Pidopryhora, Y., Szomoru, A., Yang, J.
In this paper a description is given of the SFXC software correlator, developed and maintained at the Joint Institute for VLBI in Europe (JIVE). The software is designed to run on generic Linux-based computing clusters. The correlation algorithm is e
Externí odkaz:
http://arxiv.org/abs/1502.00467
Autor:
Lebach, D. E., Bartel, N., Bietenholz, M. F., Campbell, R. M., Gordon, D., Lederman, J. I., Lestrade, J. -F., Ransom, R. R., Ratner, M. I., Shapiro, I. I.
When VLBI observations are used to determine the position or motion of a radio source relative to reference sources nearby on the sky, the astrometric information is usually obtained via: (i) phase-referenced maps; or (ii) parametric model fits to me
Externí odkaz:
http://arxiv.org/abs/1204.4642
The Galactic X-ray transient XTE J1752-223 was shown to have properties of black hole binary candidates. As reported in our previous paper, we identified transient and decelerating ejecta in multi-epoch Very Long Baseline Interferometry (VLBI) observ
Externí odkaz:
http://arxiv.org/abs/1108.3492
Autor:
Giroletti, M., Paragi, Z., Bignall, H., Doi, A., Foschini, L., Gabanyi, K. E., Reynolds, C., Blanchard, J., Campbell, R. M., Colomer, F., Hong, X., Kadler, M., Kino, M., van Langevelde, H. J., Nagai, H., Phillips, C., Sekido, M., Szomoru, A., Tzioumis, A. K.
Publikováno v:
Astronomy & Astrophysics, Volume 528, id.L11, 4 pp., 2011
There is growing evidence of relativistic jets in radio-loud narrow-line Seyfert 1 (RL-NLS1) galaxies. We constrain the observational properties of the radio emission in the first RL-NLS1 galaxy ever detected in gamma-rays, PMN J0948+0022, i.e., its
Externí odkaz:
http://arxiv.org/abs/1102.3264