Showing papers on "Magnetar published in 1987"
01 Jan 1987
TL;DR: The 15 ms pulsar PSR1937+21 has been observed using the Dugway 1000 GeV gamma ray telescopes and the observations show evidence for pulsed VHE gamma ray emission, significant at better than the 35 sd level as discussed by the authors.
Abstract: The 15 ms pulsar PSR1937+21 has been observed using the Dugway 1000 GeV gamma ray telescopes and the observations show evidence for pulsed VHE gamma ray emission, significant at better than the 35 sd level The signal comprises two pulses separated by half the period which is similar to the radio emission The total energy flux in VHE gamma rays is 2x10 erg s-l and agrees with the prediction of a current model that the peak emission of electromagnetic energy should be near 100 GeV
7 citations
TL;DR: One possibility is that the slower-than-radioactive decay typically seen in the type II light curves is itself the sign of powering by the underlying pulsar, with the decline representing not the spinning down of the pulsar but rather the declining nebular opacity that would allow increasing amounts of the energy to escape as gamma rays.
Abstract: The means by which a pulsar might be detected in the remnant of supernova 1987a in the Large Magelanic Cloud is examined. One possibility is that the slower-than-radioactive decay typically seen in the type II light curves is itself the sign of powering by the underlying pulsar, with the decline representing not the spinning down of the pulsar but rather the declining nebular opacity that would allow increasing amounts of the energy to escape as gamma rays. The test of this hypothesis (if the supernova conforms to type II expectations) would be to look for the "missing" energy in the form of those gamma rays that escape from the remnant instead of powering it.
5 citations