News of the WeekGAMMA RAY ASTRONOMY

Sky Survey Finds Mysterious Strangers

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Science  31 Mar 2000:
Vol. 287, Issue 5462, pp. 2393-2395
DOI: 10.1126/science.287.5462.2393b

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Summary

Amid the diffuse bath of gamma rays coming from the galaxy, about 200 point sources--tiny gamma ray beacons--twinkle within the haze. For 2 decades, astronomers have been puzzling over what they are. Now they have discovered that these point sources come in two different varieties, one of which turned out to be surprisingly dim.