Zobrazeno 1 - 10
of 431
pro vyhledávání: '"Waddell S"'
Autor:
Krishnan, S., Markowitz, A. G., Krumpe, M., Homan, D., Brogan, R., Haemmerich, S., Gromadzki, M., Saha, T., Schramm, M., Reichart, D. E., Winkler, H., Waddell, S., Wilms, J., Rau, A., Liu, Z., Grotova, I.
Extreme continuum variability in AGNs can indicate extreme changes in accretion flows onto supermassive black holes. We explore the multiwavelength nature of a continuum flare in the Seyfert LCRS B040659.9$-$385922. The all-sky X-ray surveys conducte
Externí odkaz:
http://arxiv.org/abs/2409.16060
Autor:
Baldini, P., Lanzuisi, G., Brusa, M., Merloni, A., Gkimisi, K., Perna, M., Lopez, I. E., Bertola, E., Igo, Z., Waddell, S., Musiimenta, B., Aydar, C., Arcodia, R., Matzeu, G. A., Luminari, A., Buchner, J., Vignali, C., Dadina, M., Comastri, A., Cresci, G., Marchesi, S., Gilli, R., Tombesi, F., Serafinelli, R.
Publikováno v:
A&A 686, A217 (2024)
Powerful outflows from active galactic nuclei (AGN) can significantly impact the gas reservoirs of their host galaxies. However, it is still unclear how these outflows can propagate from the very central regions of galaxies to their outskirts, and wh
Externí odkaz:
http://arxiv.org/abs/2402.16966
Autor:
Nandra, K., Waddell, S. G. H., Liu, T., Buchner, J., Dwelly, T., Salvato, M., Shen, Y., Wu, Q., Arcodia, R., Boller, Th., Brunner, H., Brusa, M., Collmar, W., Comparat, J., Georgakakis, A., Grau, M., Hämmerich, S., Ibarra-Medel, H., Igo, Z., Krumpe, M., Lamer, G., Merloni, A., Musiimenta, B., Wolf, J., Assef, R. J., Bauer, F. E., Brandt, W. N., Rix, H. -W.
During its calibration and performance verification phase, the eROSITA instrument aboard the SRG satellite performed a uniform wide--area X-ray survey of approximately 140 deg$^{2}$ in a region of the sky known as the eROSITA Final Equatorial Depth S
Externí odkaz:
http://arxiv.org/abs/2401.17300
Autor:
Boller, Th., Freyberg, M., Buchner, J., Haberl, F., Maitra, C., Schwope, A., Robrade, J., Rau, A., Grotova, I., Waddell, S., Ni, Q., Salvato, M., Krumpe, M., Georgakakis, A., Merloni, A., Nandra, K.
The extended ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Spectrum-Roentgen-Gamma (SRG) mission with its first All-Sky Survey (eRASS1) has offered an unprecedented, comprehensive view of the variable X-ray sky. With enhanced
Externí odkaz:
http://arxiv.org/abs/2401.17280
Autor:
Merloni, A., Lamer, G., Liu, T., Ramos-Ceja, M. E., Brunner, H., Bulbul, E., Dennerl, K., Doroshenko, V., Freyberg, M. J., Friedrich, S., Gatuzz, E., Georgakakis, A., Haberl, F., Igo, Z., Kreykenbohm, I., Liu, A., Maitra, C., Malyali, A., Mayer, M. G. F., Nandra, K., Predehl, P., Robrade, J., Salvato, M., Sanders, J. S., Stewart, I., Tubín-Arenas, D., Weber, P., Wilms, J., Arcodia, R., Artis, E., Aschersleben, J., Avakyan, A., Aydar, C., Bahar, Y. E., Balzer, F., Becker, W., Berger, K., Boller, T., Bornemann, W., Brüggen, M., Brusa, M., Buchner, J., Burwitz, V., Camilloni, F., Clerc, N., Comparat, J., Coutinho, D., Czesla, S., Dannhauer, S. M., Dauner, L., Dauser, T., Dietl, J., Dolag, K., Dwelly, T., Egg, K., Ehl, E., Freund, S., Friedrich, P., Gaida, R., Garrel, C., Ghirardini, V., Gokus, A., Grünwald, G., Grandis, S., Grotova, I., Gruen, D., Gueguen, A., Hämmerich, S., Hamaus, N., Hasinger, G., Haubner, K., Homan, D., Chitham, J. Ider, Joseph, W. M., Joyce, A., König, O., Kaltenbrunner, D. M., Khokhriakova, A., Kink, W., Kirsch, C., Kluge, M., Knies, J., Krippendorf, S., Krumpe, M., Kurpas, J., Li, P., Liu, Z., Locatelli, N., Lorenz, M., Müller, S., Magaudda, E., Mannes, C., McCall, H., Meidinger, N., Michailidis, M., Migkas, K., Muñoz-Giraldo, D., Musiimenta, B., Nguyen-Dang, N. T., Ni, Q., Olechowska, A., Ota, N., Pacaud, F., Pasini, T., Perinati, E., Pires, A. M., Pommranz, C., Ponti, G., Poppenhaeger, K., Pühlhofer, G., Rau, A., Reh, M., Reiprich, T. H., Roster, W., Saeedi, S., Santangelo, A., Sasaki, M., Schmitt, J., Schneider, P. C., Schrabback, T., Schuster, N., Schwope, A., Seppi, R., Serim, M. M., Shreeram, S., Sokolova-Lapa, E., Starck, H., Stelzer, B., Stierhof, J., Suleimanov, V., Tenzer, C., Traulsen, I., Trümper, J., Tsuge, K., Urrutia, T., Veronica, A., Waddell, S. G. H., Willer, R., Wolf, J., Yeung, M. C. H., Zainab, A., Zangrandi, F., Zhang, X., Zhang, Y., Zheng, X.
Publikováno v:
A&A, vol. 682, A34 (2024)
The eROSITA telescope array aboard the Spektrum Roentgen Gamma (SRG) satellite began surveying the sky in December 2019, with the aim of producing all-sky X-ray source lists and sky maps of an unprecedented depth. Here we present catalogues of both p
Externí odkaz:
http://arxiv.org/abs/2401.17274
Autor:
Velović, Velibor, Filipović, M. D., Barnes, L., Norris, R. P., Tremblay, C. D., Heald, G., Rudnick, L., Shabala, S. S., Pannuti, T. G., Andernach, H., Titov, O., Waddell, S. G. H., Koribalski, B. S., Grupe, D., Jarrett, T., Alsaberi, R. Z. E., Carretti, E., Collier, J. D., Einecke, S., Galvin, T. J., Hotan, A., Manojlović, P., Marvil, J., Nandra, K., Reiprich, T. H., Rowell, G., Salvato, M., Whiting, M.
We present the discovery of highly-collimated radio jets spanning a total of 355 kpc around the nearby elliptical galaxy NGC 2663, and the possible first detection of recollimation on kiloparsec scales. The small distance to the galaxy (~28.5 Mpc) al
Externí odkaz:
http://arxiv.org/abs/2207.06713
Autor:
Boller, Th., Liu, T., Weber, P., Arcodia, R., Dauser, T., Wilms, J., Nandra, K., Buchner, J., Merloni, A., Freyberg, M. J., Krumpe, M., Waddell, S. G. H.
Publikováno v:
A&A 647, A6 (2021)
The ultra-soft narrow-line Seyfert 1 galaxy 1H 0707-495 is a well-known and highly variable active galactic nucleus (AGN), with a complex, steep X-ray spectrum, and has been studied extensively with XMM-Newton. 1H 0707-495 was observed with the exten
Externí odkaz:
http://arxiv.org/abs/2011.03307
A multi-epoch X-ray spectral and variability analysis is conducted for the narrow-line Seyfert 1 (NLS1) active galactic nucleus (AGN) Mrk 478. All available X-ray data from XMM-Newton and Suzaku satellites, spanning from 2001 to 2017, are modelled wi
Externí odkaz:
http://arxiv.org/abs/1909.01897
We have carried out a systematic analysis of the nearby (z=0.0279) active galaxy Zw 229.015 using multi-epoch, multi-instrument and deep pointed observations with XMM-Newton, Suzaku, Swift and NuSTAR. Spectral and temporal variability are examined in
Externí odkaz:
http://arxiv.org/abs/1907.07048
Autor:
Gallo, L. C., Randhawa, J. S., Waddell, S. G. H., Hani, M. H., Garcia, J. A., Reynolds, C. S.
A number of works point to the presence of narrow emission features at unusual energies in the X-ray spectra of active galactic nuclei (AGN) or to potentially low iron abundances as possible evidence for the spallation of iron. With the imminence of
Externí odkaz:
http://arxiv.org/abs/1901.08383