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Physics News Update
Number 143 (Story #1), September 9, 1993 by Phillip F. Schewe and Ben Stein

SOFT GAMMA RAY REPEATERS (SGR's) are a small class of celestial objects (only 3 known specimens) that repeatingly (although not predictably) emit gammas with energies of tens of keV, in contrast to the more famous and higher-energy gamma ray bursters (more than a 1000 known) which seem never to repeat themselves. S.R. Kulkarni of Caltech and D.A. Frail of the National Radio Astronomy Observatory report that one of the repeaters, SGR1806-20, is coincident with a supernova remnant. This, along with a similar association noted for one of the other SGR's, strengthens the notion that repeaters are really neutron stars. (Nature, 2 Sep. 1993.)