Browsing by Author "Chapman, R."

Now showing items 1-12 of 12

    • A case of mistaken identity GRB 060912A and the nature of the long-short GRB divide 

      Levan, A.; Jakobsson, P.; Hurkett, C.; Tanvir, N.; Gorosabel, J.; Vreeswijk, P.M.; Rol, E.; Chapman, R.; Gehrels, N.; O'Brien, O.T.; Osborne, J.P.; Priddey, R.; Kouveliotou, C.; Starling, R.L.; Vanden Berk, D.; Wiersema, K. (2007)

    • The Early-Time Optical Properties of Gamma-Ray Burst Afterglows 

      Melandri, A.; Mundell, C.G.; Kobayashi, S.; Guidorzi, C.; Gomboc, A.; Steele, I.A.; Smith, R.J.; Bersier, D.; Mottram, C.J.; Carter, D.; Bode, M.F.; O'Brien, P.T.; Tanvir, N.; Rol, E.; Chapman, R. (2008)
      We present a multiwavelength analysis of 63 gamma-ray bursts observed with the world's three largest robotic optical telescopes, the Liverpool and Faulkes Telescopes (North and South). Optical emission was detected for 24 ...

    • Gamma-Ray Bursts in the Local Universe 

      Chapman, R. (2009-01-20)
      With energy outputs >~10^51 erg in 0.1-1000 seconds, Gamma-ray Bursts (GRBs) are the most powerful events yet observed in the Universe. As such they are potential probes of the very early Universe, back to the era of ...

    • How common are long gamma-ray bursts in the local universe 

      Chapman, R.; Tanvir, N.; Priddey, R.; Levan, A. (2007)

    • On the nature of the short duration GRB 050906 

      Levan, A.; Tanvir, N.; Jakobsson, P.; Chapman, R.; Hjorth, J.; Priddey, R.; Fynbo, J.; Hurley, K.; Jensen, B.L.; Johnson, R.; Gorosabel, J.; Castro-Tirado, A.J.; Jarvis, M.J.; Watson, D.; Wiersema, K. (2008)

    • An origin in the Local Universe for some Short Gamma Ray Bursts 

      Tanvir, N.; Chapman, R.; Levan, A.; Priddey, R. (2005-12)

    • A photometric redshift of z = 6.39 0.12 for GRB 050904 

      Haislip, J.B.; Nysewander, M.C.; Reichart, D.; Levan, A.; Tanvir, N.; Cenko, S.B.; Fox, D.B.; Price, P.A.; Castro-Tirado, A.J.; Gorosabel, J.; Evans, C.R.; Figueredo, E.; MacLeod, C.L.; Kirschbrown, J.R.; Jelinek, M.; Guizy, S.; Postigo, A.; Cypriano, E.S.; Lacluyze, A.; Graham, J.; Priddey, R.; Chapman, R.; Rhoads, J.E.; Fruchter, A.S.; Lamb, D.Q.; Kouveliotou, C.; Wijers, R.A.M.J.; Bayliss, M.B.; Schmidt, B.P.; Soderberg, A.B.; Kulkami, S.R.; Harrison, F.A.; Moon, D.S.; Gal-Yam, A.; Kasliwal, M.M.; Hudec, R.; Vitek, S.; Kubanek, P.; Crain, J.A.; Foster, A.C.; Clemens, J.C.; Bartelme, J.W.; Canterna, R.; Hartmann, D.H.; Henden, A.A.; Klose, S.; Park, H.; Williams, G.; Rol, E.; O'Brien, P.; Bersier, D.; Prada, F.; Pizarro, S.; Maturana, D.; Ugarte, P.; Alvarez, E.; Fernandez, A.J.M.; Jarvis, M.J.; Moles, M.; Alfaro, E.; Ivarsen, K.M.; Kumar, N.D.; Mack, C.E.; Zdarowicz, C.M.; Gehrels, N.; Barthelmy, S.; Burrows, D.N. (2006-03)

    • Probing gamma-ray burst environments with time variability: ULTRASPEC fast imaging of GRB 080210 

      De Cia, A.; Jakobsson, P.; Bjornsson, G.; Vreeswijk, P. M.; Dhillon, V. S.; Marsh, T. R.; Chapman, R.; Fynbo, J. P. U.; Ledoux, C.; Littlefair, S. P.; Malesani, D.; Schulze, S.; Smette, A.; Zafar, T.; Gudmundsson, E. H. (2011-04)
      We present high time resolution (1.09 s) photometry of GRB 080210 obtained with ULTRASPEC mounted on the ESO/3.6-m telescope, starting 68.22 min after the burst and lasting for 26.45 min. The light curve is smooth on both ...

    • Short gamma-ray bursts from SGR giant flares and neutron star mergers: two populations are better than one 

      Chapman, R.; Priddey, R.; Tanvir, N. (2009)
      There is increasing evidence of a local population of short duration gamma-ray bursts (sGRB), but it remains to be seen whether this is a separate population to higher redshift bursts. Here we choose plausible luminosity ...

    • Short GRBs in old populations: Magnetars from WD-WD mergers 

      Levan, A.; Wynn, G.; Chapman, R.; Davies, M.B.; King, A.R.; Priddey, R.; Tanvir, N. (2006)

    • Soft Gamma Repeaters and Short Gamma Ray Bursts: Making Magnetars from WD WD Mergers 

      Chapman, R.; Levan, A.; Priddey, R.; Tanvir, N.; Wynn, G.; King, A.R.; Davies, M.B. (Astronomical Society of the Pacific, 2007)
      Recent progress on the nature of short duration Gamma Ray Bursts (GRBs) has shown that a fraction of them originate in the local universe. These systems may well be the result of giant flares from Soft Gamma Repeaters ...

    • Two populations are better than one: Short gamma-ray bursts from SGR giant flares and NS-NS mergers 

      Chapman, R.; Priddey, R.; Tanvir, N. (American Institute of Physics (AIP), 2007)
      With a peak luminosity of ~ 1047 erg s-1 the December 27th 2004 giant flare from SGR1806-20 would have been visible by BATSE (the Burst and Transient Source Experiment) out to ≈50 Mpc. It is thus plausible that some fraction ...