ASTR()PHYSICS

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quasar rather than a cluster of galaxies or a star in ... 0.4 - 3. 5 keV energy band. An upper limit for the. X-ray flux from PHL 5200 was reported by Zamorani et al .
1987A&A...172L..11S

1987A&A...172L..11S

1987A&A...172L..11S