Sentences with phrase «bl lacs»
They collected redshift data on BL Lacs using numerous instruments, including the Hobby - Eberly Telescope at McDonald Observatory in Texas, the Keck Telescope in Hawaii and NASA's Swift satellite.
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That is, the FSRQs became BL Lacs over time.
This hybrid blazar idea implies that the luminosity of BL Lacs should decrease as their core black holes continue to lose energy and spin.