Browsing by Author "Croston, J.H."

Now showing items 1-20 of 70

    • Active galactic nuclei heating in the centres of galaxy groups: a statistical study 

      Jetha, N.N.; Ponman, T.J.; Hardcastle, M.J.; Croston, J.H. (2007)
      We present gas temperature, density, entropy and cooling time profiles for the cores of a sample of 15 galaxy groups observed with Chandra.We find that the entropy profiles follow a power-law profile down to very small ...

    • An active galactic nucleus driven shock in the intracluster medium around the radio galaxy 3C310 

      Kraft, R.P.; Nulsen, P.E.J.; Forman, W.R.; Jones, C.; Murray, S.S.; Birkinshaw, M.; Worrall, D.M.; Croston, J.H.; Hardcastle, M.J. (2012-04-10)
      We present results from a 57.6 ks Chandra observation of the cluster gas associated with the fat-double radio galaxy 3C 310. We find a surface brightness discontinuity in the gas outside the southern radio lobe that we ...

    • The active nuclei of z < 1.0 3CRR radio sources 

      Hardcastle, M.J.; Evans, D.A.; Croston, J.H. (2009)
      We combine Chandra and XMM–Newton X-ray data from our previous papers with new X-ray observations and with Spitzer mid-infrared (mid-IR) data in order to study the nature of the nuclei of radio galaxies and radio-loud ...

    • Chandra and XMM-Newton observations of NGC 6251 

      Evans, D.A.; Hardcastle, M.J.; Croston, J.H.; Worrall, D.M.; Birkinshaw, M. (2005)

    • Chandra evidence for AGN feedback in the spiral galaxy NGC 6764 

      Croston, J.H.; Hardcastle, M.J.; Kharb, P.; Kraft, R.P.; Hota, A. (2008)

    • A Chandra observation of 3C 288 - reheating the cool core of a 3 keV cluster from a nuclear outburst at z=0.246 

      Lal, D.V.; Kraft, R.P.; Forman, W.R.; Hardcastle, M.J.; Jones, C.; Nulsen, P.E.J.; Evans, D.A.; Croston, J.H.; Lee, J.C. (2010)
      We present results from a 42 ks Chandra/ACIS-S observation of the transitional FR I/FR II radio galaxy 3C 288 at z = 0.246. We detect ~3 keV gas extending to a radius of ~0.5 Mpc with a 0.5-2.0 keV luminosity of 6.6 × 1043 ...

    • The Chandra view of extended X-ray emission from Pictor A 

      Hardcastle, M.J.; Croston, J.H. (2005)

    • The cluster environments of radio-loud AGN 

      Ineson, Judith; Croston, J.H.; Hardcastle, M.J.; Kraft, Ralph; Evans, Daniel; Jarvis, M.J. (Cambridge University Press, 2015)
      Radio-loud AGN play an important role in galaxy evolution. We need to understand their properties, and the processes that affect their behaviour in order to model galaxy formation and development. We here present preliminary ...

    • Deep Chandra Observations of the Centaurus A Jet 

      Hardcastle, M.J.; Kraft, R.P.; Goodger, Joanna; Croston, J.H.; Sivakoff, G.R.; Jordan, A.; Evans, D.A. (Astronomical Society of the Pacific, 2008)
      Chandra has observed the jet of Centaurus A for 560 ks in 2007, giving a total on-source observation time since the launch of Chandra of 720 ks. Combining these datasets gives us a uniquely detailed X-ray view of the jet ...

    • Design concepts for the Cherenkov Telescope Array CTA : An advanced facility for ground-based high-energy gamma-ray astronomy 

      Allekotte, I.; Arnaldi, H.; Asorey, H.; Berisso, M.G.; Haro, M.S.; Cillis, A.; Rovero, A.C.; Supanitsky, A.D.; Actis, M.; Antico, F.; Bottani, A.; Ochoa, I.; Ringegni, P.; Vallejo, G.; de la Vega, G.; Etchegoyen, A.; García, B.; Sánchez, F.; Videla, M.; González, F.; Otero, L.; Pallota, J.; Quel, E.; Ristori, P.; Romero, G.E.; Suárez, A.; Akhperjanian, A.; Papyan, G.; Pogosyan, L.; Sahakian, V.; Bissaldi, E.; Egberts, K.; Reimer, A.; Reimer, O.; Shellard, R.C.; Santos, E.M.; de Gouveia Dal Pino, E.M.; Kowal, G.; de Souza, V.; Peixoto, C.J.T.; Maneva, G.; Temnikov, P.; Vankov, H.; Golev, V.; Ovcharov, E.; Bonev, T.; Dimitrov, D.; Hrupec, D.; Nedbal, D.; Rob, L.; Lindfors, E.; Sillanpää, A.; Takalo, L.; Beckmann, V.; Benallou, M.; Boutonnet, C.; Corlier, M.; Courty, B.; Djannati-Ataï, A.; Dufour, C.; Gabici, S.; Guglielmi, L.; Olivetto, C.; Pita, S.; Punch, M.; Selmane, S.; Terrier, R.; Yoffo, B.; Brun, P.; Carton, P.H.; Cazaux, S.; Corpace, O.; Delagnes, E.; Disset, G.; Durand, D.; Glicenstein, J.-F.; Guilloux, F.; Kosack, K.; Medina, C.; Micolon, P.; Mirabel, F.; Moulin, E.; Peyaud, B.; Reymond, J.-M.; Veyssiere, C.; Brau-Nogué, S.; Jean, P.; Knödlseder, J.; Le Padellec, A.; Webb, N.; Cerruti, B.; Dubus, G.; Henri, G.; Petrucci, P.O.; Barbier, C.; Brunetti, L.; Cailles, M.; Deleglise, G.; Elles, S.; Fouque, N.; Gasq, C.; Geffroy, N.; Komin, N.; Kossakowski, R.; Lamanna, G.; Le Flour, T.; Lieunard, B.; Monteiro, I.; Panazol, J.L.; Rosier-Lees, S.; Vialle, J.P.; Becherini, Y.; Clerc, C.; Couturier, S.; de Naurois, M.; Edy, E.; Fillin-Martino, E.; Fontaine, G.; Giebels, B.; Khélifi, B.; Manigot, P.; Moal, B.; Spyrou, S.; Bourgeat, M.; Compin, M.; Feinstein, F.; Gallant, Y.; Lavalley, C.; Renaud, M.; Rivoire, S.; Royer, S.; Vasileiadis, G.; Vorobiov, S.; Boisson, C.; Cerruti, M.; Mottez, F.; Roy, F.; Sol, H.; Venter, L.; Zech, A.; Dournaux, J.-L.; Huet, J.-M.; Laporte, P.; Castarede, H.; Bolmont, J.; Corona, P.; Huppert, J.-F.; Jacholkowska, A.; Naumann, C.; Nayman, P.; Tavernet, J.-P.; Toussenel, F.; Vincent, P.; Carr, J.; Costantini, H.; Ernenwein, J.-P.; Hoffmann, D.; Karkar, S.; Mendes, A.; Artmann, S.; Becker, J.; Schlickeiser, R.; Federici, S.; Pohl, M.; Ruppel, J.; Telezhinsky, I.; Bähr, J.; Behera, B.; Birsin, E.; Decerprit, B.; Heller, R.; Kostka, P.; Kretzschmann, A.; Maier, G.; Melkumyan, D.; Naumann, D.; Arribas, M.P.; Platzer, R.; Prokoph, H.; Schlenstedt, S.; Schmidt, T.; Schultze, J.; Shayduk, M.; Skole, C.; Sternberger, R.; Sulanke, K.H.; Wegner, P.; Welsing, R.; Winde, M.; Wischnewski, R.; Lohse, T.; Oya, I.; Schwanke, U.; Doert, M.; Rhode, W.; Jung, I.; Lopatin, A.; Schulz, A.; Stegmann, C.; Stinzing, F.; Horns, D.; Kneiske, T.; Raue, M.; Tluczykont, M.; Hauser, M.; Quirrenbach, A.; Reimann, C.; Tam, P.H.; Tchernin, C.; Wagner, S.; Walter, P.; Bauer, C.; Bernlöhr, K.; de Oña Wilhelmi, E.; Deil, C.; Domainko, W.; Föhr, C.; Förster, A.; Hahn, J.; Hermann, G.; Hofmann, W.; Hofverberg, P.; Kankanyan, R.; Kihm, T.; Köck, F.; Panter, M.; Rieger, F.; van Eldik, C.; Volpe, F.; de Almeida, U.B.; Colin, P.; Dettlaff, T.; Fink, D.; Fruck, C.; Haefner, D.; Haubold, T.; Jablonski, C.; Jogler, T.; Krause, J.; Lorenz, E.; Mirzoyan, R.; Nowak, N.; Paneque, D.; Reimann, O.; Rodriguez, S.; Saito, K.; Saito, T.; Schweizer, T.; Sun, S.; Takami, H.; Teshima, M.; Wagner, R.M.; Wetteskind, H.; Barnstedt, J.; Bonardi, A.; Dick, J.; Gäbele, W.; Kalkuhl, C.; Kendziorra, E.; Luz, O.; Pühlhofer, G.; Renner, S.; Santangelo, A.; Schanz, T.; Schwarzburg, S.; Tenzer, C.; Spanier, F.; Tibolla, O.; Bais, A.; Balis, D.; Eleftheriadis, C.; Gianakaki, E.; Kokkotas, K.; Liolios, A.; Nikolaidis, A.; Seiradakis, J.; Stergioulas, N.; Vlahos, L.; Mastichiadis, A.; Vlahakis, N.; Aravantinos, A.; Farakos, K.; Fokitis, E.; Maltezos, S.; Aharonian, F.; Drury, L.; Agnetta, G.; Catalano, O.; Cusumano, G.; Giarrusso, S.; La Barbera, N.; La Parola, V.; La Rosa, G.; Maccarone, M.C.; Mangano, A.; Mineo, T.; Romano, P.; Russo, F.; Sacco, B.; Vercellone, S.; Di Pierro, F.; Morello, C.; Vallania, P.; Cavazzani, S.; Zitelli, V.; Basso, S.; Canestrari, R.; Cantu, S.; Casiraghi, M.; Conconi, P.; Covino, S.; Ghigo, M.; Motta, G.; Pareschi, G.; Salini, A.; Spiga, D.; Tagliaferri, G.; Belluso, M.; Billotta, S.; Bonanno, G.; Giro, E.; Lessio, L.; Antonelli, L.A.; Carosi, A.; Di Paolo, A.; Fontana, A.; Testa, V.; Tavani, M.; Ghedina, A.; Molinari, E.; Tosti, G.; Bastieri, D.; Busetto, G.; Buson, S.; Corti, D.; Doro, M.; Giubilato, P.; Lombardi, S.; Mariotti, M.; Mattiazzo, S.; Paiano, S.; Pepato, A.; Pivato, G.; Prandini, E.; Rando, R.; Saggion, A.; Scalzotto, V.; Scarcioffolo, M.; Schultz, C.; Tibaldo, L.; Meucci, M.; Paoletti, R.; Stamerra, A.; Angelis, A.d.; de Lotto, B.; Scapin, V.; Dazzi, F.; Persic, M.; Bamba, A.; Sakaki, N.; Shibata, T.; Yamaoka, K.; Yamazaki, R.; Yoshida, A.; Fukazawa, Y.; Kakuwa, J.; Mizuno, T.; Yonetani, M.; Takahashi, H.; Katagiri, H.; Yanagita, S.; Yoshida, T.; Okumura, A.; Ioka, K.; Kawanaka, N.; Kohri, K.; Nakayama, K.; Ohira, Y.; Tanaka, M.; Chikawa, M.; Muraishi, H.; Yamamoto, T.; Hayashida, M.; Inoue, S.; Totani, T.; Kubo, H.; Tanimori, T.; Nagataki, S.; Mori, K.; Takahashi, K.; Matsumoto, H.; Tajima, H.; Fujita, Y.; Toma, K.; Terada, Y.; Kodani, K.; Kushida, J.; Nishijima, K.; Kabuki, S.; Orito, R.; Sugawara, R.; Asano, K.; Enomoto, R.; Inoue, Y.; Kifune, T.; Murase, K.; Ohishi, M.; Ohka, H.; Yoshikoshi, T.; Nakamori, T.; Gunji, S.; Hagiwara, R.; Tokanai, F.; Hara, S.; Naito, T.; Steenkamp, R.; Vink, J.; Markoff, S.; Bednarek, W.; Niedźwiecki, A.; Sitarek, J.; Sobczyńska, D.; Szanecki, M.; Bogacz, L.; Kozioł, J.; Małkiewicz, P.; Ostrowski, M.; Piechocki, W.; Stawarz, Ł.; Szostek, A.; Wierzcholska, A.; Zagdański, A.; Ziȩtara, K.; Bulik, T.; Cieślar, M.; Gochna, M.; Grudzińska, M.; Kapala, M.; Pojmański, G.; Suchenek, M.; Bajtlik, S.; Barnacka, A.; Borkowski, J.; Dyks, J.; Janiak, M.; Kluźniak, W.; Lubiński, P.; Moderski, R.; Rudak, B.; Sikora, M.; Zajczyk, A.; Zdziarski, A.; Dyrda, M.; Kotuła, J.; Michałowski, J.; Niemiec, J.; Stodulski, M.; Ziółkowski, P.; Zychowski, P.; Katarzyński, K.; Ciesielska, M.; Grygorczuk, J.; Karczewski, M.; Kȩdziora, B.; Płatos, Ł.; Rataj, M.; Seweryn, K.; Tokarz, M.; Wawer, P.; Wawrzaszek, R.; Wiśniewski, Ł.; Kasperek, J.; Rajda, P.; Wolczko, A.; Oziȩbło, A.; Szepieniec, T.; de Jager, O.; van der Walt, J.; Becerra, J.; Berger, K.; López, R.J.G.; Herrero, A.; Conde, M.Á.S.; Berdugo, J.; Carmona, E.; Delgado, C.; Díaz, C.; Mañá, C.; Marín, J.; Martínez, G.; Colomé, J.; de Cea del Pozo, E.; Hadasch, D.; Pedaletti, G.; Torres, D.F.; Rico, J.; Aleksić, J.; Barceló, M.; Blanch, O.; Boix, J.; Cortina, J.; Firpo, R.; Gaweda, J.; Giavitto, G.; González, A.; Grañena, F.; Illa, J.M.; Klepser, S.; López, A.; Martínez, M.; Mazin, D.; Moralejo, A.; Stamatescu, V.; Baixeras, C.; Font, L.; Garrido, D.; Gaug, M.; Munar, P.; Paredes, J.M.; Ribó, M.; Zabalza, V.; Garrido, L.; Gascón, D.; Graciani, R.; Sanuy, A.; Antoranz, P.; Bernardino, T.; Fresnillo, L.; Miranda, J.M.; Vegas, I.; Barrio, J.A.; Contreras, J.L.; Dubois, F.; Hassan, T.; Mirabal, N.; Salazar, E.; Tejedor, L.A.; de la Calle Pérez, I.; Ibarra, A.; Ponz, J.D.; Dravins, D.; Ingjald, J.; Jensen, H.; Conrad, J.; Dickinson, H.; Finley, C.; Hultquist, K.; Ripken, J.; Fransson, C.; Ryde, F.; Botner, O.; Hallgren, A.; Bretz, T.; Ribordy, M.; Biland, A.; Braun, I.; Grimm, O.; Krähenbühl, T.; Roeser, U.; Vogler, P.; von Gunten, H.P.; Weitzel, Q.; Dorner, D.; Farnier, C.; Lenain, J.-P.; Lyard, E.; Walter, R.; Florin, D.; Gadola, A.; Gredig, R.; Huber, B.; Manalaysay, A.; Steiner, S.; Straumann, U.; Vollhardt, A.; Allan, D.; Chadwick, P.M.; Daniel, M.K.; Knappy, A.R.; McComb, T.J.L.; Nolan, S.J.; Rulten, C.B.; Schmoll, J.; Talbot, R.G.; Blake, S.; Parsons, R.D.; Fraser, G.W.; Hinton, J.A.; O'Brien, P.T.; Osborne, J.P.; Starling, R.L.C.; Warwick, R.; White, R.; Wilkinson, M.I.; Greenshaw, T.; Sutcliffe, P.; Green, A.; Ghag, C.; Murphy, A.S.; Kudryavtsev, V.A.; Granot, J.; Hardcastle, M.J.; McCubbin, N.; Preece, R.; Bird, T.; Croston, J.H.; Emmanoulopoulos, D.; Maccarone, T.; McHardy, I.; Cotter, G.; Karastergiou, A.; Mertsch, P.; Potter, W.; Sarkar, S.; Silk, J.; Byrum, K.; Guarino, V.; Wagner, B.; Krennrich, F.; Orr, M.; Weinstein, A.; Konopelko, A.; Smith, N.; Xiong, Q.; Bechtol, K.; Bühler, R.; Cameron, R.; Chiang, J.; Digel, S.W.; Dubois, R.; Funk, S.; Glanzman, T.; Sapozhnikov, L.; Vandenbroucke, J.; Wood, M.; Benbow, W.; Galante, N.; Schroedter, M.; Briggs, M.S.; Connaughton, V.; Arlen, T.; Bobkov, A.A.; Majumdar, P.; Ong, R.A.; Vassiliev, V.V.; Bouvier, A.; Otte, A.N.; Williams, D.A.; Bogdan, M.; Huan, H.; Humensky, T.B.; Wakely, S.P.; Kieda, D.; Beilicke, M.; Buckley, J.H.; Bugaev, V.; Krawczynski, H.; Grube, J.; Gyuk, G.; Falcone, A.D.; Finley, J.P.; Ferenc, D.; Fortson, L.; Karlsson, N.; Aliu, E.; Errando, M.; Mukherjee, R.; Kaaret, P.; Coppi, P.; Szymkowiak, A.; Knapp, J. (2011-12-01)
      Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes. Ground-based gamma-ray astronomy has a huge potential in ...

    • The dynamics and environmental impact of 3C452 

      Shelton, D.L.; Hardcastle, M.J.; Croston, J.H. (2011)
      We present a detailed analysis of a new XMM-Newton observation of the Fanaroff-Riley type II (FR II) radio galaxy 3C452 and its environment. We detect X-ray emission from the hot intragroup medium and measure its temperature ...

    • The Dynamics of Radio Galaxies and Double-Double Radio Galaxies 

      Konar, C.; Jamrozy, M.; Hardcastle, M.J.; Croston, J.H.; Nandi, S.; Saikia, D. J.; Machalski, J. (2011-12)
      Relativistic and magnetized plasma ejected by radio loud AGNs through jets form the diffuse lobes of radio galaxies. The radiating particles (electron/electron-positron) in lobes emit in radio via the synchrotron process ...

    • The dynamics of the giant radio galaxy 3C 457 

      Konar, C.; Hardcastle, M.J.; Croston, J.H.; Saikia, D.J. (2009)
      We present multifrequency radio observations with the Giant Metrewave Radio Telescope and Very Large Array, and X-ray observations with the X-ray Multi-Mirror Mission (XMM–Newton) telescope of the giant radio source (GRS) ...

    • Episodic radio galaxies J0116-4722 and J1158+2621 : Can we constrain the quiescent phase of nuclear activity? 

      Konar, C.; Hardcastle, M.J.; Jamrozy, M.; Croston, J.H. (2013-04-11)
      We present multifrequency radio observations of two well-known episodic Fanaroff-Railey type II (FR II) radio galaxies (J0116-4722 and J1158+2621) and a detailed investigation of the life cycle of episodic radio galaxies ...

    • Evidence for Non-Hydrostatic Gas Motions in the Hot Interstellar Medium of Centaurus A 

      Kraft, R.P.; Hardcastle, M.J.; Sivakoff, G.R.; Jordan, A.; Nulsen, P.E.J.; Birkinshaw, M.; Forman, W.R.; Jones, C.; Worrall, D.M.; Croston, J.H.; Evans, D.A.; Raychaudhury, S.; Murray, S.S.; Brassington, Nicola; Goodger, Joanna; Harris, W.E.; Juett, A.M.; Sarazin, C.L.; Woodley, K.A. (2008)
      We present preliminary results from a deep (600 ks) Chandra observation of the hot interstellar medium of the nearby early-type galaxy Centaurus A. We find a surface brightness discontinuity in the gas ~3.5 kpc from the ...

    • Evidence for radio-source heating of groups 

      Croston, J.H.; Hardcastle, M.J.; Birkinshaw, M. (2005-02)

    • A flare in the jet of Pictor A 

      Marshall, H.L.; Hardcastle, M.J.; Birkinshaw, M.; Croston, J.H.; Evans, D.; Landt, H.; Lenc, E.; Massaro, F.; Perlman, E.; Schwartz, D.A.; Siemiginowska, A.; Stawarz, L.; Urry, C.M.; Worrall, D.M. (2010)
      A Chandra X-ray imaging observation of the jet in Pictor A showed a feature that appears to be a flare that faded between 2000 and 2002. The feature was not detected in a follow-up observation in 2009. The jet itself is ...

    • FRII sources at z>0.5: X-ray properties of the core and extended emission 

      Belsole, E.; Croston, J.H.; Worrall, D.M.; Hardcastle, M.J. (2005)

    • Galaxy cluster X-ray luminosity scaling relations from a representative local sample (REXCESS) 

      Pratt, G.W.; Croston, J.H.; Arnaud, M.; Boehringer, H. (2009)

    • Galaxy-cluster gas-density distributions of the Representative XMM-Newton Cluster Structure Survey (REXCESS) 

      Croston, J.H.; Pratt, G.W.; Boehringer, H.; Arnaud, M.; Pointecouteau, E.; Ponman, T.J.; Sanderson, A.J.R.; Temple, R.F.; Bower, R.; Donahue, M. (2008)