Packet 1: Tossup 6

A model of these phenomena consists of radiation-dominated and matter-dominated regimes driven by an “internal engine.” Data from these phenomena paradoxically predict a non-thermal spectrum from an optically thick compact source. The spectra of these phenomena, which have been recorded by the BATSE (“BAT-see”) experiment, (10[1])are modeled by (-5[1])an empirical function developed by David Band. (10[1])Models of these phenomena predict a long “afterglow.” (-5[1])These phenomena occur at irregular intervals (-5[1])from (10[1])“soft repeaters” (10[1])discovered (10[2])to be (10[1])magnetars. (10[3]-5[1])These phenomena, which can occur (10[1])as a result of neutron star mergers, (10[1]-5[2])were first (-5[1])accidentally observed (10[1])by the Vela (10[1])satellite in (-5[1])an attempt (-5[1])to detect nuclear weapon testing on Earth. For 10 points, name these extragalactic events that produce the most-energetic (10[1])electromagnetic (10[1])radiation. (10[1])■END■ (10[6]0[2])

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