01614oam 2200469 a 450 991070234790332120121206153459.0(CKB)5470000002426680(OCoLC)820469938(EXLCZ)99547000000242668020121206d1988 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierVariable spectra of active galaxies[electronic resource] final technical report /prepared by Jules P. HalpernMarshall Space Flight Center, AL :National Aeronautics and Space Administration, George C. Marshall Space Flight Center,[1988]1 online resource (xi, 119 pages) illustrations[NASA contractor report] ;NASA-CR-182694Title from title screen (viewed on Dec. 6, 2012)."May 1988.""CAL-1683."Includes bibliographical references (pages 45-46).Variable spectra of active galaxies Active galaxiesnasatX ray absorptionnasatX ray sourcesnasatX ray spectranasatActive galaxies.X ray absorption.X ray sources.X ray spectra.Halpern Jules P1411245George C. Marshall Space Flight Center.GPOGPOGPOBOOK9910702347903321Variable spectra of active galaxies3501951UNINA