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... for long periods of time at selected x-ray sources previously identified by HEAO 1 . Pictures returned by HEAO-B would be the first spacecraft-generated x-ray images of objects other ... separation in orbit. Lewis Research Center managed launch-vehicle procurement and related activities for the HEAO program. MARSHALL SPACE FLIGHT CENTER MSFC would control the in-orbit HEAD observatories, in conjunction ... -control engineers operating from Goddard Space Flight Center . Cost of the three-mission HEAO program was about $248 million, HEAO -B's approximately $87 million. (NASA Release 78-165; MOR S-382 ...

... of data from 200 to 1000 or more, with further increases during the extended operation. HEAO 1 , although basically a scanning instrument, had been versatile enough to stop its rotation and ... at items of particular interest; resolution and sensitivity would increase tremendously in the pointing mode. HEAO 1 was performing about 5 daytime pointings lasting about 3hr during a week; extended mission ...

... mission unique experiment module (EM) filling the requirements of each payload segment. Dr. Fred Speer, HEAO manager at Marshall Space Flight Center , said the spacecraft, rotating end over end, would survey ... as great as all the radiant energy of earth's sun. The other experiments on HEAO 1 were a scanning-modulation collimator to make parallel observations, using instruments designed by Harvard ...

... that Dr. Noel Hinners, NASA associate administrator for space science, had praised the performance of HEAO 1 in a report to the subcommittee on space science and applications of the House ... are being analyzed as they come from the spacecraft," Hinners said. He also noted that HEAO 1 data indicated a new black-hole candidate in the constellation Ara. Scientific results such ... these had been "so significant that we made a decision to extend the operation of HEAO 1 through March 1979," Hinners concluded. (Marshall Star, Oct 11/78, 4) September 1978 September ...

... counters remained unimpaired because of their modular construction and were able to achieve overall objectives. HEAO l data clarified x-ray sources barely visible in older studies; the faintest sources seen ... Lacerta object Markarian-5011 spectra, which were extremely hard, establishing the lack of surrounding gas. HEAO 1 had discovered that the strongest active sources in the galaxy were emitting radiation into ...

... that it broke up over the South Pacific east of Australia. HEAO 1 had reentered in 1979; HEAO 3 , in December 1981. HEAO 2 had not been operational for almost a year, as ... maintain attitude and had to be powered down. Launched in September 1979 and nicknamed Einstein, HEAO 2 had operated for nearly 2½ years, carrying the largest X-ray telescope ever built ... clusters. Scientists said it would take three years longer to analyze the data from the HEAO s. ( MARSHALL SPACE FLIGHT CENTER MSFC Release 82-31) February 1982 February March 1982 March ...

... ) Marshall Space Flight Center ( MARSHALL SPACE FLIGHT CENTER MSFC ) reported that HEAO 2 , NASAs second high-energy astronomy observatory ( HEAO ), had expended its control-gas supply and ended its mission. One of ... of three "highly successful" scientific satellites managed by MARSHALL SPACE FLIGHT CENTER MSFC , HEAO 2 (like its predecessor, HEAO 1 ) had performed twice as long as its predicted design life; a third ...

... to study celestial x-rays and gamma rays, was officially a success. Primary objective of HEAO 1 was to obtain highly detailed experimental data on astrophysical phenomena by measuring sizes and ... administrator for space science, the objective had been accomplished. NASA had authorized an extension of HEAO 1 's mission to a second scan of the celestial sphere, and would broaden scientific ... a second high-energy astronomy observatory designed for detailed study of interesting sources pinpointed by HEAO 1 ; a third would be launched in 1979. (NASA Release 78-80) April 1978 April ...

... had already engendered more than 160 technical papers and scientific presentations, and analysis of the HEAO 1 data would require years of work by high-energy astrophysicists; the findings might change fundamental concepts of the universe, the NASA report said. HEAO 1 would probably reenter Earth's atmosphere in late March. (NASA Release 79-4; MARSHALL ...

NASA launched the high-energy astronomy observatory HEAO 3 at 1:28 a.m. EDT from Cape Canaveral Air Force Station on an ... sources, measure gamma-ray flux, and define the composition of cosmic-ray nuclei. The first HEAO , launched in 1977 with a 6-month design lifetime, measured and mapped X-ray and ... November 1978 with a 1-year lifetime to examine in greater detail the findings of HEAO 1 . HEAO 3 carried a gamma-ray spectrometer and experiments on a cosmic-ray isotopes and ...

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