Zobrazeno 1 - 9
of 9
pro vyhledávání: '"S G H Waddell"'
Autor:
Velibor Velović, M D Filipović, L Barnes, R P Norris, C D Tremblay, G Heald, L Rudnick, S S Shabala, T G Pannuti, H Andernach, O Titov, S G H Waddell, B S Koribalski, D Grupe, T Jarrett, R Z E Alsaberi, E Carretti, J D Collier, S Einecke, T J Galvin, A Hotan, P Manojlović, J Marvil, K Nandra, T H Reiprich, G Rowell, M Salvato, M Whiting
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 516:1865-1880
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1450c6b0cb813563ff7bd385e0295f41
https://doi.org/10.1093/mnras/stac2012
https://doi.org/10.1093/mnras/stac2012
Autor:
J. Wolf, K. Nandra, M. Salvato, J. Buchner, M. Onoue, T. Liu, R. Arcodia, A. Merloni, S. Ciroi, F. Di Mille, V. Burwitz, M. Brusa, R. Ishimoto, N. Kashikawa, Y. Matsuoka, T. Urrutia, S. G. H. Waddell
This study aims at identifying luminous quasars at $z>5.7$ among X-ray-selected sources in the eROSITA Final Equatorial-Depth Survey (eFEDS) in order to place a lower limit on black hole accretion well into the epoch of re-ionisation. We confirm the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5025e18c7d8cbeeb348d767c04e71b64
https://hdl.handle.net/11577/3467111
https://hdl.handle.net/11577/3467111
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 489:5398-5412
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::795d771cb68708f7436223add8afd20c
https://doi.org/10.1093/mnras/stz2518
https://doi.org/10.1093/mnras/stz2518
Autor:
Luigi C. Gallo, S G H Waddell
A sample of narrow-line (NLS1) and broad-line Seyfert 1 (BLS1) galaxies observed with Suzaku is presented. The final sample consists of 22 NLS1s and 47 BLS1s, for a total of 69 AGN that are all at low redshift (z
Accepted for publication in MNRA
Accepted for publication in MNRA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82992968217a29be5c1305fb875eedc4
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7b65045495a58d3669bee72291fd8b8
http://arxiv.org/abs/1907.07048
http://arxiv.org/abs/1907.07048
Autor:
Christopher S. Reynolds, J. S. Randhawa, Luigi C. Gallo, Javier A. García, S G H Waddell, Maan H. Hani
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b5de82f99a5b1fa795405555a39accb
Autor:
Shruti Tripathi, S. Komossa, Luigi C. Gallo, Ciro Pinto, Anil K. Pradhan, A G Gonzalez, Anna Lia Longinotti, Yair Krongold, Gerard A. Kriss, Dirk Grupe, S G H Waddell, A. C. Fabian, Michael Parker, H. J. S. Ehler, Dan R. Wilkins, Smita Mathur
A triggered 140 ks XMM-Newton observation of the narrow-line Seyfert 1 (NLS1) Mrk 335 in December 2015 caught the active galaxy at its lowest X-ray flux since 2007. The NLS1 is relatively quiescent for the first ~120 ks of the observation before it f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cab4fff7192ccc4dd5563623b350c83
Autor:
P. Weber, Johannes Buchner, Th. Boller, Thomas Dauser, Joern Wilms, S. G. H. Waddell, Kirpal Nandra, R. Arcodia, Mirko Krumpe, Teng Liu, Michael Freyberg, Andrea Merloni
Publikováno v:
Astronomy & Astrophysics. 647:A6
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::682c96727138e9b41303b8d1085f6678
https://doi.org/10.1051/0004-6361/202039316
https://doi.org/10.1051/0004-6361/202039316
We report on X-ray observations of the radio-intermediate, X-ray bright Seyfert 1 galaxy, III Zw 2, obtained with XMM-Newton, Suzaku, and Swift over the past 17-years. The source brightness varies significantly over yearly time scales, but more modes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1983bffa5832af6bb6439d12d5e0996