No Supernovae Associated with Two Long-Duration Γ-Ray Bursts
1 No supernovae associated with two long-duration γ-ray bursts Johan P. U. Fynbo1, Darach Watson1, Christina C. Thöne1, Jesper Sollerman1,2, Joshua S. Bloom3, Tamara M. Davis1, Jens Hjorth1, Páll Jakobsson4, Uffe G. Jørgensen5, John F. Graham6, Andrew S. Fruchter6, David Bersier7, Lisa Kewley8, Arnaud Cassan9, José María Castro Cerón1, Suzanne Foley10, Javier Gorosabel11, Tobias C. Hinse5, Keith D. Horne12, Brian L. Jensen1, Sylvio Klose13, Daniel Kocevski3, Jean-Baptiste Marquette14, Daniel Perley3, Enrico Ramirez-Ruiz15,16, Maximilian D. Stritzinger1, Paul M. Vreeswijk17,18, Ralph A. M. Wijers19, Kristian G. Woller5, Dong Xu1, Marta Zub6 1Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark 2Department of Astronomy, Stockholm University, Sweden 3Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720, USA 4Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield, Herts, AL10 9AB, UK 5Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark 6Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, Maryland 21218, USA 7Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD, UK 2 8University of Hawaii, Institute of Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822, US 9Astronomisches Rechen-Institut (ARI), Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchof Str.
[Show full text]