Browsing Research publications by Author "Gehrels, N."

Now showing items 1-17 of 17

    • 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)

    • Detection of a spectral break in the extra hard component of GRB 090926A 

      Ackermann, M.; Ajello, M.; Asano, K.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Baring, M.G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Bhat, P.N.; Bissaldi, E.; Blandford, R.; Bonamente, E.; Borgland, A.W.; Bouvier, A.; Bregeon, J.; Brez, A.; Briggs, M.S.; Brigida, M.; Bruel, P.; Buehler, R.; Buson, S.; Caliandro, G.A.; Cameron, R.A.; Caraveo, P.A.; Carrigan, S.; Casandjian, J.M.; Cecchi, C.; Celik, O.; Chaplin, V.; Charles, E.; Chekhtman, A.; Chiang, J.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Connaughton, V.; Conrad, J.; Cutini, S.; Dermer, C.; de Angelis, A.; de Palma, F.; Dingus, B.; do Couto e Silva, E.; Drell, P.S.; Dubois, R.; Favuzzi, C.; Fegan, S.; Ferrara, E.C.; Focke, W.B.; Frailis, M.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Gehrels, N.; Giglietto, N.; Giordano, N.; Vilchez, N. (2011)
      We report on the observation of the bright, long gamma-ray burst,GRB 090926A, by the Gamma-ray Burst Monitor (GBM) and Large Area Tele-scope (LAT) instruments on board the Fermi Gamma-ray Space Telescope. GRB 090926A shares ...

    • Detection of high-energy gamma-ray emission during the X-ray flaring activity in GRB100728A 

      Abdo, A.A.; Ackermann, M.; Ajello, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Baring, M.G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Bhat, P.N.; Bissaldi, E.; Blandford, R.; Bonamente, E.; Bonnell, I.; Borgland, A.W.; Bouvier, A.; Bregeon, J.; Brigida, M.; Bruel, P.; Buehler, R.; Buson, S.; Caliandro, G.A.; Cameron, R.A.; Caraveo, P.A.; Casandjian, J.M.; Cecchi, C.; Charles, E.; Chekhtman, A.; Chiang, J.; Ciprini, S.; Claus, R.; Connaughton, V.; Conrad, J.; Cutini, S.; de Angelis, A.; de Palma, F.; Dermer, C.; Silva, E.D.E.; Drell, P.S.; Dubois, R.; Favuzzi, C.; Fukazawa, Y.; Fusco, P.; Gargano, F.; Gehrels, N.; Germani, S.; Giglietto, N.; Giommi, P.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Granot, Jonathan; Grenier, I.A.; Guiriec, S.; Hadasch, D.; Hanabata, Y.; Hughes, R.E.; Johannesson, G.; Johnson, A.S.; Kamae, T.; Katagiri, H.; Kataoka, J.; Kerr, M.; Knodlseder, J.; Kuss, M.; Lande, J.; Latronico, L.; Lee, S.H.; Longo, F.; Loparco, F.; Lott, B.; Lubrano, P.; Mazziotta, M.N.; McEnery, J.E.; Meszaros, P.; Michelson, P.F.; Mizuno, D.; Moiseev, A.A.; Monzani, M.E.; Morselli, A.; Moskalenko, I.V.; Murgia, S.; Nakamori, T.; Naumann-Godo, M.; Nolan, P.L.; Norris, J.P.; Nuss, E.; Ohsugi, T.; Okumura, A.; Omodei, N.; Orlando, E.; Paciesas, W.S.; Pelassa, V.; Pesce-Rollins, M.; Pierbattista, M.; Piron, F.; Porter, T.A.; Racusin, J.L.; Raino, S.; Razzano, M.; Razzaque, S.; Reimer, A.; Reimer, O.; Reyes, L.C.; Roth, M.; Sadrozinski, H.F.W.; Sgro, C.; Siskind, E.J.; Smith, P.D.; Sonbas, E.; Spandre, G.; Spinelli, P.; Stamatikos, M.; Strickman, M.S.; Takahashi, H.; Tanaka, T.; Tanaka, Y.; Thayer, J.G.; Torres, D.F.; Tosti, G.; Troja, E.; Uehara, T.; Usher, T.L.; Vandenbroucke, J.; Vasileiou, V.; Vianello, G.; Vilchez, N.; Vitale, V.; von Kienlin, A.; Waite, A.P.; Wang, P.; Winer, B.L.; Wood, K.S.; Yamazaki, R.; Yang, Z.; Ziegler, M.; Piro, L. (2011)
      We present the simultaneous Swift and Fermi observations of the bright GRB 100728A and its afterglow. The early X-ray emission is dominated by a vigorous flaring activity continuing until 1 ks after the burst. In the same ...

    • Evidence for a Canonical Gamma-Ray Burst Afterglow Light Curve in the Swift XRT Data 

      Nousek, J.A.; Kouveliotou, C.; Grupe, D.; Page, K.L.; Granot, J.; Ramirez-Ruiz, E.; Patel, S.K.; Burrows, D.N.; Mangano, V.; Barthelmy, S.; Beardmore, A.P.; Campana, S.; Capalbi, M.; Chincarini, G.; Cusumano, G.; Falcone, A.D.; Gehrels, N.; Giommi, P.; Goad, M.R.; Godet, O.; Hurkett, C.; Kennea, J.A.; Moretti, A.; O'Brien, P.T.; Osborne, J.P.; Romano, P.; Tagliaferri, G.; Wells, A.A. (2006)

    • An expanding radio nebula produced by a giant flare from the magnetar SGR 1806-20 

      Gaensler, B.M.; Kouveliotou, C.; Gelfand, J.D.; Taylor, G.B.; Eichler, D.; Wijers, R.A.M.J.; Granot, J.; Ramirez-Ruiz, E.; Lyubarsky, Y.E.; Hunstead, R.W.; Campbell-Wilson, D.; van der Horst, A.J.; McLaughlin, M.A.; Fender, R.P.; Garrett, M.A.; Newton-McGee, K.J.; Palmer, D.M.; Gehrels, N.; Woods, P.M. (2005)

    • The Gamma Ray Burst section of the White Paper on the Status and Future of Very High Energy Gamma Ray Astronomy: A Brief Preliminary Report 

      Falcone, A.D.; Williams, D.A.; Baring, M.G.; Blandford, R.; Connaughton, V.; Coppi, P.; Dermer, C.; Dingus, B.; Fryer, C.; Gehrels, N.; Granot, J.; Horan, D.; Katz, J.I.; Kuehn, K.; Meszaros, P.; Norris, J.; Parkinson, P.S.; Pe'er, A.; Ramirez-Ruiz, E.; Razzaque, S.; Wang, X.; Zhang, B. (2008)

    • The Gamma Ray Burst section of the White Paper on the Status and Future of Very High Energy Gamma Ray Astronomy: A Brief Preliminary Report 

      Falcone, A.D.; Williams, D.A.; Baring, M.G.; Blandford, R.; Connaughton, V.; Coppi, P.; Dermer, C.; Dingus, B.; Fryer, C.; Gehrels, N.; Granot, J.; Horan, D.; Katz, J.I.; Kuehn, K.; Meszaros, P.; Norris, J.; Parkinson, P.S.; Pe'er, A.; Ramirez-Ruiz, E.; Razzaque, S.; Wang, X.; Zhang, B. (American Institute of Physics (AIP), 2008)
      This is a short report on the preliminary findings of the gamma ray burst (GRB) working group for the white paper on the status and future of very high energy (VHE; >50 GeV) gamma-ray astronomy. The white paper discusses ...

    • A giant y-ray flare from the magnetar SGR 1806-20 

      Palmer, D.M.; Barthelmy, S.; Gehrels, N.; Kippen, R.M.; Cayton, T.; Kouveliotou, C.; Eichler, D.; Wijers, R.A.M.J.; Woods, P.M.; Granot, J.; Lyubarsky, Y.E.; Ramirez-Ruiz, E.; Barbier, L.; Chester, M.; Cummings, J.; Fenimore, E.E.; Finger, M.H.; Gaensler, B.M.; Hullinger, D.; Krimm, H.; Markwardt, C.B.; Nousek, J.A.; Parsons, A.; Patel, S.K.; Sakamoto, T.; Sato, G.; Suzuki, M.; Tueller, J. (2005)

    • GRB 080503: Implications of a Naked Short Gamma-Ray Burst Dominated by Extended Emission 

      Perley, D.A.; Metzger, B.D.; Granot, J.; Butler, N.R.; Sakamoto, T.; Ramirez-Ruiz, E.; Levan, A.; Bloom, J.S.; Miller, A.A.; Bunker, A.; Chen, H-W.; Filippenko, A.; Gehrels, N.; Glazebrook, K.; Hall, P.B.; Hurley, K.; Kocevski, D.; Li, W.; Lopez, S.; Norris, J.; Piro, A.L.; Poznanski, D.; Prochaska, J.X.; Quataert, E.; Tanvir, N. (2009)
      We report on observations of GRB 080503, a short gamma-ray burst (GRB) with very bright extended emission (about 30 times the gamma-ray fluence of the initial spike) in conjunction with a thorough comparison to other short ...

    • GRB 081028 and its late-time afterglow re-brightening 

      Margutti, R.; Genet, F.; Granot, J.; Duran, R.B.; Guidorzi, C.; Chincarini, G.; Mao, J.; Schady, P.; Sakamoto, T.; Miller, A.A.; Olofsson, G.; Bloom, J.S.; Evans, P.A.; Fynbo, J.; Malesani, D.; Moretti, A.; Pasotti, F.; Starr, D.; Burrows, D.N.; Barthelmy, S.; Roming, P.W.A.; Gehrels, N. (2010)
      Swift captured for the first time a smoothly rising X-ray re-brightening of clear non-flaring origin after the steep decay in a long gamma-ray burst (GRB): GRB 081028. A rising phase is likely present in all GRBs but is ...

    • A limit on the variation of the speed of light arising from quantum gravity effects 

      Abdo, A.A.; Ackermann, M.; Ajello, M.; Asano, K.; Atwood, W.B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Baring, M. G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Bhat, P.N.; Bissaldi, E.; Bloom, E. D.; Bonamente, E.; Bonnell, J.; Borgland, A.W.; Bouvier, A.; Bregeon, J.; Brez, A.; Briggs, M.S.; Brigida, M.; Bruel, P.; Burgess, J. M.; Burnett, T. H.; Caliandro, G.A.; Cameron, R.A.; Caraveo, P.A.; Casandjian, J.M.; Cecchi, C.; Celik, Oe; Chaplin, V.; Charles, E.; Cheung, C. C.; Chiang, J.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Cominsky, L. R.; Connaughton, V.; Conrad, J.; Cutini, S.; Dermer, C. D.; de Angelis, A.; de Palma, F.; Digel, S.W.; Dingus, B. L.; do couto silva, E.; Drell, P.S.; Dubois, R.; Dumora, D.; Farnier, C.; Favuzzi, C.; Fegan, S. J.; Finke, J.; Fishman, G.; Focke, W.B.; Foschini, L.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Gehrels, N.; Germani, S.; Gibby, L.; Giebels, B.; Giglietto, N.; Giordano, F.; Glanzman, T.; Godfrey, G.; Granot, J.; Greiner, J.; Grenier, I.A.; Grondin, M. -H.; Grove, J. E.; Grupe, D.; Guillemot, L.; Guiriec, S.; Hanabata, Y.; Harding, A. K.; Hayashida, M.; Hays, E.; Hoversten, E. A.; Hughes, R.E.; Johannesson, G.; Johnson, A.S.; Johnson, R. P.; Johnson, W. N.; Kamae, T.; Katagiri, H.; Kataoka, J.; Kawai, N.; Kerr, M.; Kippen, R.M.; Knoedlseder, J.; Kocevski, D.; Kouveliotou, C.; Kuehn, F.; Kuss, M.; Lande, J.; Latronico, L.; Lemoine-Goumard, M.; Longo, F.; Loparco, F.; Lott, B.; Lovellette, M. N.; Lubrano, P.; Madejski, G. M.; Makeev, A.; Mazziotta, M.N.; McBreen, S.; McEnery, J.E.; McGlynn, S.; Meszaros, P.; Meurer, C.; Michelson, P.F.; Mitthumsiri, W.; Mizuno, T.; Moiseev, A.A.; Monte, C.; Monzani, M.E.; Moretti, E.; Morselli, A.; Moskalenko, I.V.; Murgia, S.; Nakamori, T.; Nolan, P.L.; Norris, J.P.; Nuss, E.; Ohno, M.; Ohsugi, T.; Omodei, N.; Orlando, E.; Ormes, J. F.; Ozaki, M.; Paciesas, W. S.; Paneque, D.; Panetta, J. H.; Parent, D.; Pelassa, V.; Pepe, M.; Pesce-Rollins, M.; Petrosian, V.; Piron, F.; Porter, T.A.; Preece, R.; Raino, S.; Ramirez-Ruiz, E.; Rando, R.; Razzano, M.; Razzaque, S.; Reimer, A.; Reimer, O.; Reposeur, T.; Ritz, S.; Rochester, L. S.; Rodriguez, A. Y.; Roth, M.; Ryde, F.; Sadrozinski, H.F.W.; Sanchez, D.; Sander, A.; Parkinson, P. M. Saz; Scargle, J. D.; Schalk, T. L.; Sgro, C.; Siskind, E.J.; Smith, D. A.; Smith, P.D.; Spandre, G.; Spinelli, P.; Stamatikos, M.; Stecker, F. W.; Strickman, M.S.; Suson, D. J.; Tajima, H.; Takahashi, H.; Takahashi, T.; Tanaka, T.; Thayer, J. B.; Thayer, J.G.; Thompson, D.J.; Tibaldo, L.; Toma, K.; Torres, D.F.; Tosti, G.; Troja, E.; Uchiyama, Y.; Uehara, T.; Usher, T.L.; van der Horst, A. J.; Vasileiou, V.; Vilchez, N.; Vitale, V.; von Kienlin, A.; Waite, A.P.; Wang, P.; Wilson-Hodge, C.; Winer, B.L.; Wood, K.S.; Wu, X. F.; Yamazaki, R.; Ylinen, T.; Ziegler, M. (2009-11-19)
      A cornerstone of Einstein's special relativity is Lorentz invariance-the postulate that all observers measure exactly the same speed of light in vacuum, independent of photon-energy. While special relativity assumes that ...

    • Magnetar twists: Fermi/Gamma-Ray Burst Monitor detection of SGR J1550-5418 

      Kaneko, Y.; Gogus, E.; Kouveliotou, C.; Granot, J.; Ramirez-Ruiz, E.; van der Horst, A.J.; Watts, A.L.; Finger, M.H.; Gehrels, N.; Pe'er, A.; van der Klis, M.; von Kienlin, A.; Wachter, S.; Wilson-Hodge, C.A.; Woods, P.M. (2010)
      SGR J1550-5418 (previously known as AXP 1E 1547.0-5408 or PSR J1550-5418) went into three active bursting episodes in 2008 October and in 2009 January and March, emitting hundreds of typical soft gamma repeater bursts in ...

    • A new y-ray burst classification scheme from GRB 060614 

      Gehrels, N.; Norris, J.P.; Barthelmy, S.; Granot, J.; Kaneko, Y.; Kouveliotou, C.; Markwardt, C.B.; Meszaros, P.; Nakar, E.; Nousek, J.A.; O'Brien, P.T.; Page, M.J.; Palmer, D.M.; Parsons, A.; Roming, P.W.A.; Sakamoto, T.; Sarazin, C.L.; Schady, P.; Stamatikos, M.; Woosley, S.E. (2006)

    • 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)

    • Rise and fall of the X-ray flash 080330: an off-axis jet? 

      Guidorzi, C.; Clemens, C.; Kobayashi, S.; Granot, J.; Melandri, A.; D'Avanzo, P.; Kuin, N.P.M.; Klotz, A.; Fynbo, J.; Covino, S.; Greiner, J.; Malesani, D.; Mao, J.; Mundell, C.G.; Steele, I.A.; Jakobsson, P.; Margutti, R.; Bersier, D.; Campana, S.; Chincarini, G.; D'Elia, V.; Fugazza, D.; Genet, F.; Gomboc, A.; Kruhler, T.; Yoldas, A.K.; Moretti, A.; Mottram, C.J.; O'Brien, P.T.; Smith, R.J.; Szokoly, G.; Tagliaferri, G.; Tanvir, N.; Gehrels, N. (2009)
      Context. X-ray flashes (XRFs) are a class of gamma-ray bursts (GRBs) with a peak energy of the time-integrated spectrum, , typically below 30 keV, whereas classical GRBs have of a few hundreds of keV. Apart from and the ...

    • SGR J1550-5418 bursts detected with the Fermi Gamma-ray burst monitor during its most prolific activity. 

      van der Horst, A. J.; Kouveliotou, C.; Gorgone, N. M.; Kaneko, Y.; Baring, M. G.; Guiriec, S.; Gogus, E.; Granot, J.; Watts, A. L.; Lin, L.; Bhat, P.N.; Bissaldi, E.; Chaplin, V. L.; Finger, M. H.; Gehrels, N.; Gibby, M. H.; Giles, M. M.; Goldstein, A.; Gruber, D.; Harding, A. K.; Kaper, L.; von Kienlin, A.; van der Klis, M.; McBreen, S.; Mcenery, J.; Meegan, C. A.; Paciesas, W. S.; Pe'er, A.; Preece, R. D.; Ramirez-Ruiz, E.; Rau, A.; Wachter, S.; Wilson-Hodge, C.; Woods, P. M.; Wijers, R. A. M. J. (2012-04)
      We have performed detailed temporal and time-integrated spectral analysis of 286 bursts from SGR J1550-5418 detected with the Fermi Gamma-ray Burst Monitor (GBM) in 2009 January, resulting in the largest uniform sample of ...

    • X-ray flare candidates in short gamma-ray bursts 

      Margutti, R.; Chincarini, G.; Bernardini, M.G.; Zaninoni, E.; Margutti, R.; Berger, E.; Soderberg, A.M.; Chincarini, G.; Granot, J.; Guidorzi, C.; Gehrels, N.; Stamatikos, M.; Stamatikos, M.; Zaninoni, E. (2011-11-01)
      We present the first systematic study of X-ray flare candidates in short gamma-ray bursts (SGRBs) exploiting the large 6-year Swift data base with the aim to constrain the physical nature of such fluctuations. We find that ...