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Browsing by Author "O'Brien, P. T."

Browsing by Author "O'Brien, P. T."

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  • Black hole feedback in the luminous quasar PDS 456 
    Nardini, E.; Reeves, J. N.; Gofford, J.; Harrison, F. A.; Risaliti, G.; Braito, V.; Costa, M. T.; Matzeu, G. A.; Walton, D. J.; Behar, E.; Boggs, S. E.; Christensen, F. E.; Craig, W. W.; Hailey, C. J.; Matt, G.; Miller, J. M.; O'Brien, P. T.; Stern, D.; Turner, T. J.; Ward, M. J. (2015)
    The evolution of galaxies is connected to the growth of supermassive black holes in their centers. During the quasar phase, a huge luminosity is released as matter falls onto the black hole, and radiation-driven winds can ...
  • A faint optical flash in dust-obscured GRB 080603A: implications for GRB prompt emission mechanisms 
    Guidorzi, C.; Kobayashi, S.; Perley, D. A.; Vianello, G.; Bloom, J. S.; Chandra, P.; Kann, D. A.; Li, W.; Mundell, C. G.; Pozanenko, A.; Prochaska, J. X.; Antoniuk, K.; Bersier, D.; Filippenko, A. V.; Frail, D. A.; Gomboc, A.; Klunko, E.; Melandri, A.; Mereghetti, S.; Morgan, A. N.; O'Brien, P. T.; Rumyantsev, V.; Smith, R. J.; Steele, I. A.; Tanvir, N. R.; Volnova, A. (2011)
    We report the detection of a faint optical flash by the 2-m Faulkes Telescope North simultaneously with the second of two prompt ?-ray pulses in INTEGRAL gamma-ray burst (GRB) 080603A, beginning at t<sub>rest</sub>= 37 s ...
  • GRB 091024A and the Nature of Ultra-long Gamma-Ray Bursts 
    Virgili, F. J.; Mundell, C. G.; Pal'shin, V.; Guidorzi, C.; Margutti, R.; Melandri, A.; Harrison, R.; Kobayashi, S.; Chornock, R.; Henden, A.; Updike, A. C.; Cenko, S. B.; Tanvir, N. R.; Steele, I. A.; Cucchiara, A.; Gomboc, A.; Levan, A.; Cano, Z.; Mottram, C. J.; Clay, N. R.; Bersier, D.; Kopac, D.; Japelj, J.; Filippenko, A. V.; Li, W.; Svinkin, D.; Golenetskii, S.; Hartmann, D. H.; Milne, P. A.; Williams, G.; O'Brien, P. T.; Fox, D. B.; Berger, E. (2013)
    We present a broadband study of gamma-ray burst (GRB) 091024A within the context of other ultra-long-duration GRBs. An unusually long burst detected by Konus-Wind (KW), Swift, and Fermi, GRB 091024A has prompt emission ...
  • GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts 
    Schulze, S.; Malesani, D.; Cucchiara, A.; Tanvir, N. R.; Krühler, T.; de Ugarte Postigo, A.; Leloudas, G.; Lyman, J.; Bersier, D.; Wiersema, K.; Perley, D. A.; Schady, P.; Gorosabel, J.; Anderson, J. P.; Castro-Tirado, A. J.; Cenko, S. B.; De Cia, A.; Ellerbroek, L. E.; Fynbo, J. P. U.; Greiner, J.; Hjorth, J.; Kann, D. A.; Kaper, L.; Klose, S.; Levan, A. J.; Martín, S.; O'Brien, P. T.; Page, K. L.; Pignata, G.; Rapaport, S.; Sánchez-Ramírez, R.; Sollerman, J.; Smith, I. A.; Sparre, M.; Thöne, C. C.; Watson, D. J.; Xu, D.; Bauer, F. E.; Bayliss, M.; Björnsson, G.; Bremer, M.; Cano, Z.; Covino, S.; D'Elia, V.; Frail, D. A.; Geier, S.; Goldoni, P.; Hartoog, O. E.; Jakobsson, P.; Korhonen, H.; Lee, K. Y.; Milvang-Jensen, B.; Nardini, M.; Nicuesa Guelbenzu, A.; Oguri, M.; Pandey, S. B.; Petitpas, Glen R.; Rossi, A.; Sandberg, A.; Schmidl, S.; Tagliaferri, G.; Tilanus, R. P. J.; Winters, J. M.; Wright, D.; Wuyts, E. (2014)
    Context. At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with luminosities that are substantially lower (L<SUB>iso</SUB> ? 10<SUP>48.5</SUP> erg s<SUP>-1</SUP>) than the average of more distant ...

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