Now showing items 1-4 of 4

    • AFTERGLOW OBSERVATIONS OF FERMI LARGE AREA TELESCOPE GAMMA-RAY BURSTS AND THE EMERGING CLASS OF HYPER-ENERGETIC EVENTS 

      Cenko, S. B.; Frail, D. A.; Harrison, F. A.; Haislip, Joshua B.; Reichart, Daniel E.; Butler, N. R.; Cobb, B. E.; Cucchiara, A.; Berger, E.; Bloom, J. S.; Chandra, P.; Fox, D. B.; Perley, Daniel; Prochaska, J. X.; Filippenko, A. V.; Glazebrook, K.; Ivarsen, K. M.; Kasliwal, M. M.; Kulkarni, S. R.; LaCluyze, Aaron P.; López, S.; Morgan, A. N.; Pettini, M.; Rana, V. R. (2011-05-01)
      We present broadband (radio, optical, and X-ray) light curves and spectra of the afterglows of four long-duration gamma-ray bursts (GRBs; GRBs 090323, 090328, 090902B, and 090926A) detected by the Gamma-Ray Burst Monitor ...
    • GRB090426: the environment of a rest-frame 0.35-s gamma-ray burst at a redshift of 2.609 

      Levesque, Emily M.; Bloom, Joshua S.; Butler, Nathaniel R.; Perley, Daniel; Cenko, S. Bradley; Prochaska, Xavier; Kewley, Lisa; Bunker, Andrew; Chen, Hsiao-Wen; Chornock, Ryan; Filippenko, Alexei V.; Glazebrook, Karl; López Morales, Sebastián; Masiero, Joseph; Modjaz, Maryam; Morgan, Adam; Poznanski, Dovi (2010)
      We present the discovery of an absorption-line redshift of z = 2.609 for GRB 090426, establishing the first firm lower limit to a redshift for a gamma-ray burst (GRB) with an observed duration of <2 s.With a rest-frame ...
    • No supernovae associated with two long-duration gamma-ray bursts 

      Fynbo, Johan P. U.; Watson, Darach; Thöne, Christina C.; Sollerman, Jesper; Bloom, Joshua S.; Davis, Tamara M.; Hjorth, Jens; Jakobsson, Páll; Jørgensen, Uffe G.; Graham, John F.; Fruchter, Andrew S.; Bersier, David; Kewley, Lisa; Cassan, Arnaud; Castro Cerón, José María; Foley, Suzanne; Gorosabel, Javier; Hinse, Tobias C.; Horne, Keith D.; Jensen, Brian L.; Klose, Sylvio; Kocevski, Daniel; Marquette, Jean-Baptiste; Perley, Daniel; Ramírez Ruiz, Enrico; Stritzinger, Maximilian D.; Vreeswijk, Paul M.; Wijers, Ralph A. M.; Woller, Kristian G.; Xu, Dong; Zub, Marta (NATURE PUBLISHING GROUP, 2006-12-21)
      It is now accepted that long-duration gamma-ray bursts (GRBs) are produced during the collapse of a massive star(1,2). The standard 'collapsar' model(3) predicts that a broad-lined and luminous type Ic core-collapse supernova ...
    • On the Source of the Dust Extinction in Type Ia Supernovae and the Discovery of Anomalously Strong Na I Absorption 

      Phillips, M. M.; Simon, Joshua D.; Morrell, Nidia; Burns, Christopher R.; Cox, Nick; Foley, Ryan J.; Karakas, Amanda; Patat, F.; Sternberg, A.; Williams, R.; Gal Yam, Avishay; Hsiao, Eric; Leonard, D.; Persson, Sven; Stritzinger, Maximilian; Thompson, I.; Campillay, Abdo; Contreras, Carlos; Folatelli, Gastón; Freedman, Wendy L.; Hamuy Wackenhut, Mario; Roth, Miguel; Shields, Gregory; Suntzeff, Nicholas B.; Chomiuk, Laura; Ivans, Inese; Madore, Barry; Penprase, B.; Perley, Daniel; Pignata Libralato, Giuliano; Preston, G.; Soderberg, Alicia (The American Astronomical Society, 2013-11-10)
      High-dispersion observations of the Na i D λλ5890, 5896 and K i λλ7665, 7699 interstellar lines, and the diffuse interstellar band at 5780 Å in the spectra of 32 Type Ia supernovae are used as an independent means of ...