* Astronomy

Title: GRB 080407: an ultra-long burst discovered by the IPN
Authors: V. Pal'shin, K. Hurley, J. Goldsten, I. G. Mitrofanov, W. Boynton, A. von Kienlin, J. Cummings, M. Feroci, R. Aptekar, D. Frederiks, S. Golenetskii, E. Mazets, D. Svinkin, D. Golovin, M. L. Litvak, A. B. Sanin, C. Fellows, K. Harshman, R. Starr, A. Rau, V. Savchenko, X. Zhang, S. Barthelmy, N. Gehrels, H. Krimm, D. Palmer, E. Del Monte, M. Marisaldi

We present observations of the extremely long GRB 080407 obtained with the instruments of the Interplanetary Network (IPN). The observations reveal two distinct emission episodes, separated by a ~1500 s long period of quiescence. The total burst duration is about 2100 s. We compare the temporal and spectral characteristics of this burst with those obtained for other ultra-long GRBs and discuss these characteristics in the context of different models.

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