Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Tzioumis, Anastasios"'
Autor:
Benke, Petra, Rösch, Florian, Ros, Eduardo, Kadler, Matthias, Ojha, Roopesh, Edwards, Philip G., Horiuchi, Shinji, Hyland, Lucas J., Phillips, Chris, Quick, Jonathan F. H., Stevens, Jamie, Tzioumis, Anastasios K., Weston, Stuart
Publikováno v:
A&A 681, A69 (2024)
With the emergence of very high energy astronomy (VHE; E>100 GeV), new open questions were presented to astronomers studying the multi-wavelength emission from blazars. Answers to these open questions, such as the Doppler crisis, and finding the loca
Externí odkaz:
http://arxiv.org/abs/2310.10206
Autor:
Bietenholz, Michael F., Bartel, Norbert, Dwarkadas, Vikram V., Mtshweni, Leon, Orquera-Rojas, Carlos, Ellingsen, Simon, Horiuchi, Shinji, Tzioumis, Anastasios
We present broadband radio flux-density measurements supernova (SN) 1996cr, made with MeerKAT, ATCA and ALMA, and images made from very long baseline interferometry (VLBI) observations with the Australian Long Baseline Array. The spectral energy dist
Externí odkaz:
http://arxiv.org/abs/2210.16895
Autor:
Tudor, Vlad, Miller-Jones, James C. A., Strader, Jay, Bahramian, Arash, Shishkovsky, Laura, Plotkin, Richard M., Chomiuk, Laura, Heinke, Craig O., Maccarone, Thomas J., Sivakoff, Gregory R., Tremou, Evangelia, Anderson, Gemma E., Russell, Thomas D., Tzioumis, Anastasios K.
Radio continuum observations offer a new window on compact objects in globular clusters compared to typical X-ray or optical studies. As part of the MAVERIC survey, we have used the Australia Telescope Compact Array to carry out a deep (median centra
Externí odkaz:
http://arxiv.org/abs/2204.08861
Autor:
Espinasse, Mathilde, Corbel, Stéphane, Kaaret, Philip, Tremou, Evangelia, Migliori, Giulia, Plotkin, Richard M., Bright, Joe, Tomsick, John, Tzioumis, Anastasios, Fender, Rob, Orosz, Jerome A., Gallo, Elena, Homan, Jeroen, Jonker, Peter G., Miller-Jones, James C. A., Russell, David M., Motta, Sara
The black hole MAXI J1820+070 was discovered during its 2018 outburst and was extensively monitored across the electromagnetic spectrum. Following the detection of relativistic radio jets, we obtained four Chandra X-ray observations taken between 201
Externí odkaz:
http://arxiv.org/abs/2004.06416
Autor:
Cendes, Yvette, Gaensler, Bryan, Ng, Chi-Yung, Zanardo, Giovanna, Staveley-Smith, Lister, Tzioumis, Anastasios
We report on updated radio imaging observations of the radio remnant of Supernova 1987A (SN 1987A) at 9 GHz, taken with the Australia Telescope Compact Array (ATCA), covering a 25-year period (1992-2017). We use Fourier modeling of the supernova remn
Externí odkaz:
http://arxiv.org/abs/1809.02364
Autor:
Krauß, Felicia, Wilms, Joern, Kadler, Matthias, Ojha, Roopesh, Schulz, Robert, Trüstedt, Jonas, Edwards, Philip G., Stevens, Jamie, Ros, Eduardo, Baumgartner, Wayne, Beuchert, Tobias, Blanchard, Jay, Buson, Sara, Carpenter, Bryce, Dauser, Thomas, Falkner, Sebastian, Gehrels, Neil, Gräfe, Christina, Gulyaev, Sergei, Hase, Hayo, Horiuchi, Shinji, Kreikenbohm, Annika, Kreykenbohm, Ingo, Langejahn, Marcus, Leiter, Katharina, Lovell, Jim E. J., Müller, Cornelia, Natusch, Tim, Nesci, Roberto, Pursimo, Tapio, Phillips, Chris, Plötz, Christian, Quick, Jonathan, Tzioumis, Anastasios K., Weston, Stuart
Publikováno v:
A&A 591, A130 (2016)
Simultaneous broadband spectral and temporal studies of blazars are an important tool for investigating active galactic nuclei (AGN) jet physics. We study the spectral evolution between quiescent and flaring periods of 22 radio-loud AGN through multi
Externí odkaz:
http://arxiv.org/abs/1605.00841
Autor:
Rahoui, Farid, Tomsick, John A., Coriat, Mickael, Corbel, Stephane, Fuerst, Felix, Gandhi, Poshak, Kalemci, Emrah, Migliari, Simone, Stern, Daniel, Tzioumis, Anastasios
We report on a multiwavelength observational campaign of the black hole X-ray binary Swift J1753.5-0127 that consists of an ESO/X-shooter spectrum supported by contemporaneous Swift/XRT+UVOT and ATCA data. ISM absorption lines in the X-shooter spectr
Externí odkaz:
http://arxiv.org/abs/1508.02394
Publikováno v:
Mon.Not.Roy.Astron.Soc.356:17,2005
Intermediate mass black holes have been alternatively predicted to be quite common in the centers of globular clusters or nearly impossible to form and retain in the centers of globular clusters. As it has been recently shown that radio observations
Externí odkaz:
http://arxiv.org/abs/astro-ph/0411109
Autor:
Padovani, Paolo, Perlman, Eric, Giommi, Paolo, Sambruna, Rita, Jones, Laurence R., Tzioumis, Anastasios, Reynolds, John
We have undertaken a survey for blazars by correlating the ROSAT WGACAT database with publicly available radio catalogs, restricting our candidate list to serendipitous flat-spectrum sources (alpha_r <= 0.7). We discuss here our survey methods, ident
Externí odkaz:
http://arxiv.org/abs/astro-ph/9803298
Autor:
Perlman, Eric, Padovani, Paolo, Giommi, Paolo, Sambruna, Rita, Jones, Laurence R., Tzioumis, Anastasios, Reynolds, John
Publikováno v:
AJ, 115, 1253 (1998)
We have undertaken a survey of archived, pointed ROSAT PSPC data for blazars by correlating the ROSAT WGACAT database with several publicly available radio catalogs, restricting our candidate list to serendipitous flat radio spectrum sources (alpha_r
Externí odkaz:
http://arxiv.org/abs/astro-ph/9801024