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55
Nov 19, 2009
11/09
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NASA/Marshall Space Flight Center
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The family of High Energy Astronomy Observatory (HEAO) instruments consisted of three unmarned scientific observatories capable of detecting the x-rays emitted by the celestial bodies with high sensitivity and high resolution. The celestial gamma-ray and cosmic-ray fluxes were also collected and studied to learn more about the mysteries of the universe. High-Energy rays cannot be studied by Earth-based observatories because of the obscuring effects of the atmosphere that prevent the rays from...
Topics: What -- HEAO 1, What -- Earth, What -- HEAO 2, What -- HEAO 3
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1383
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65
Nov 19, 2009
11/09
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NASA/Marshall Space Flight Center
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The launch of an Atlas/Centaur launch vehicle is shown in this photograph. The Atlas/Centaur, launched on November 13, 1978, carried the High Energy Astronomy Observatory (HEAO)-2 into the required orbit. The second observatory, the HEAO-2 (nicknamed the Einstein Observatory in honor of the centernial of the birth of Albert Einstein) carried the first telescope capable of producing actual photographs of x-ray objects.
Topic: What -- HEAO 2
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1553
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89
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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favorite 2
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This Atlas/Centaur launch vehicle, carrying the High Energy Astronomy Observatory (HEAO)-3, lifted off on September 20, 1979. The HEAO-3's mission was to survey and map the celestial sphere for gamma-ray flux and make detailed measurements of cosmic-ray particles. It carried three scientific experiments: a gamma-ray spectrometer, a cosmic-ray isotope experiment, and a heavy cosmic-ray nuclei experiment. The HEAO-3 was originally identified as HEAO-C but the designation was changed once the...
Topics: What -- HEAO 3, What -- Spectrometer
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1566
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60
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 60
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This schematic details the third High Energy Astronomy Observatory (HEAO)-3. The HEAO-3's mission was to survey and map the celestial sphere for gamma-ray flux and make detailed measurements of cosmic-ray particles. It carried three scientific experiments: a gamma-ray spectrometer, a cosmic-ray isotope experiment, and a heavy cosmic-ray nuclei experiment. The HEAO-3 was originally identified as HEAO-C but the designation was changed once the spacecraft achieved orbit.
Topics: What -- HEAO 3, What -- Spectrometer
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1388
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103
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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The Atlas-Centaur-52 launch vehicle on the launch pad. The Atlas-Centaur-52 placed the High Energy Astronomy Observatory-2 (HEAO-2) in orbit on November 13, 1978.
Topics: What -- Atlas, What -- Centaur, What -- HEAO 2
Source: http://mix.msfc.nasa.gov/abstracts.php?p=907
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213
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 213
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This image of the suspected Black Hole, Cygnus X-1, was the first object seen by the High Energy Astronomy Observatory (HEAO)-2/Einstein Observatory. According to the theories to date, one concept of a black hole is a star, perhaps 10 times more massive than the Sun, that has entered the last stages of stelar evolution. There is an explosion triggered by nuclear reactions after which the star's outer shell of lighter elements and gases is blown away into space and the heavier elements in the...
Topics: What -- Cygnus, What -- HEAO 2, What -- Sun
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1568
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65
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 65
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This picture is of an Atlas/Centaur launch vehicle, carrying the High Energy Astronomy Observatory (HEAO)-1, on Launch Complex 36 at the Air Force Eastern Test Range prior to launch on August 12, 1977. The Kennedy Space Center managed the launch operations that included a pre-aunch checkout, launch, and flight, up through the observatory separation in orbit.
Topics: What -- HEAO 1, Where -- Kennedy Space Center (KSC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1550
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52
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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This photograph shows the High Energy Astronomy Observatory (HEAO)-2 experiment level testing after integration at TRW, Inc., the prime contractor for the HEAO. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual photographs of x-ray objects. TRW, Inc. designed and developed the HEAOs under the project management of the Marshall Space Flight Center. The HEAO-2 was originally identified as HEAO-B but the designation was changed once the...
Topics: What -- HEAO 2, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1380
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125
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 125
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This photograph was taken during the assembly of the High Energy Astronomy Observatory (HEAO)-2 at TRW, Inc., the prime contractor for the HEAOs. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual photographs of x-ray objects. TRW, Inc. designed and developed the HEAO, under the project management of the Marshall Space Flight Center. The HEAO-2 was originally identified as HEAO-B but the designation was changed once the spacecraft achieved...
Topics: What -- HEAO 2, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1569
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91
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 91
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This artist's concept depicts the High Energy Astronomy Observatory (HEAO)-2 in orbit. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual photographs of x-ray objects. Shortly after launch, the HEAO-2 was nicknamed the Einstein Observatory by its scientific experimenters in honor of the centernial of the birth of Albert Einstein, whose concepts of relativity and gravitation have influenced much of modern astrophysics, particularly x-ray...
Topics: What -- HEAO 2, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1385
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50
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 50
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Managed by the Marshall Space Flight Center and built by TRW, the third High Energy Astronomy Observatory was launched September 20, 1979. HEAO-3 was designed to study gamma-rays and cosmic ray particles.
Topics: What -- HEAO 3, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1947
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61
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 61
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This drawing is a schematic of the High Energy Astronomy Observatory (HEAO)-1. The first observatory, designated HEAO-1, was launched on August 12, 1977 aboard an Atlas/Centaur launch vehicle and was designed to survey the sky for additional x-ray and gamma-ray sources as well as pinpointing their positions. The HEAO-1 was originally identified as HEAO-A but the designation was changed once the spacecraft achieved orbit. The HEAO project involved the launching of three unmarned scientific...
Topics: What -- HEAO 1, What -- Earth, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1551
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47
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 47
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This photograph shows the High Energy Astronomy Observatory (HEAO)-3 being prepared for encapsulation. Designed and developed by TRW, Inc. under the direction of the Marshall Space Flight Center, the objectives of the HEAO-3 were to survey and map the celestial sphere for gamma-ray flux and make detailed measurements of cosmic-ray particles. It carried three scientific experiments: a gamma-ray spectrometer, a cosmic-ray isotope experiment, and a heavy cosmic-ray nuclei experiment. The HEAO-3...
Topics: What -- HEAO 3, What -- Spectrometer, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1565
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95
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 95
favorite 0
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This artist's concept depicts the third observatory, the High Energy Astronomy Observatory (HEAO)-3 in orbit. Designed and developed by TRW, Inc. under the direction of the Marshall Space Flight Center, the HEAO-3's mission was to survey and map the celestial sphere for gamma-ray flux and make detailed measurements of cosmic-ray particles. It carried three scientific experiments: a gamma-ray spectrometer, a cosmic-ray isotope experiment, and a heavy cosmic-ray nuclei experiment. The HEAO-3 was...
Topics: What -- HEAO 3, What -- Spectrometer, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1387
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53
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 53
favorite 0
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This photograph was taken during encapsulation of the High Energy Astronomy Observatory (HEAO)-3. Designed and developed by TRW, Inc. under the direction of the Marshall Space Flight Center, the objectives of the HEAO-3 were to survey and map the celestial sphere for gamma-ray flux and make detailed measurements of cosmic-ray particles. It carried three scientific experiments: a gamma-ray spectrometer, a cosmic-ray isotope experiment, and a heavy cosmic-ray nuclei experiment. The HEAO-3 was...
Topics: What -- HEAO 3, What -- Spectrometer, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1564
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40
Nov 9, 2010
11/10
by
Willcox, P. J
texts
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"A Hearthstone book."
Topics: Nuclear astrophysics, High Energy Astronomy Observatories, Astronomie, Vulgarisation, HEAO, Mission...
NASA grants to MIT for investigations in experimental and theoretical high energy astrophysics have, over the years, nurtured the infrastructure development and experimental activities that have led to successful proposals for the OSO 7, SAS 3, HEAO 1, and HEAO 2 missions and to the achievements in high energy astrophysics of the MIT Group. This report consists of excerpts from the progress reports of 1988 through 1990 that have been submitted as a regular feature of the renewal requests. These...
Topics: NASA Technical Reports Server (NTRS), ASTROPHYSICS, HIGH ENERGY INTERACTIONS, NASA PROGRAMS,...
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51
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 51
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The dramatic change in x-ray emission from the Terzan 2 cluster is shown in this series of 2.5-minute exposures taken with the High Energy Astronomy Observatory (HEAO)-2/Einstein Observatory immediately before, during, and after the burst. Total exposure (20 minutes) of the object, including the outburst, is shown in the fourth photograph. These images represent the first observation of an x-ray burst in progress. The actual burst lasted 50 seconds. Among the rarest, and most bizarre, phenomena...
Topics: What -- HEAO 2, What -- Sun, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1559
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379
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
image
eye 379
favorite 0
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This artist's conception depicts the High Energy Astronomy Observatory (HEAO)-1 in orbit. The first observatory, designated HEAO-1, was launched on August 12, 1977 aboard an Atlas/Centaur launch vehicle and was designed to survey the sky for additional x-ray and gamma-ray sources as well as pinpointing their positions. The HEAO-1 was originally identified as HEAO-A but the designation was changed once the spacecraft achieved orbit. The HEAO project involved the launching of three unmarned...
Topics: What -- HEAO 1, What -- Earth, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1384
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97
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 97
favorite 0
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This image is an observation of Quasar 3C 273 by the High Energy Astronomy Observatory (HEAO)-2/Einstein Observatory. It reveals the presence of a new source (upper left) with a red shift that indicates that it is about 10 billion light years away. Quasars are mysterious, bright, star-like objects apparently located at the very edge of the visible universe. Although no bigger than our solar system, they radiate as much visible light as a thousand galaxies. Quasars also emit radio signals and...
Topics: What -- HEAO 2, What -- Visible Light, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1554
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73
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 73
favorite 0
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This image is an x-ray view of Eta Carinae Nebula showing bright stars taken with the High Energy Astronomy Observatory (HEAO)-2/Einstein Observatory. The Eta Carinae Nebula is a large and complex cloud of gas, crisscrossed with dark lanes of dust, some 6,500 light years from Earth. Buried deep in this cloud are many bright young stars and a very peculiar variable star. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual photographs of x-ray...
Topics: What -- HEAO 2, What -- Earth, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1555
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57
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 57
favorite 1
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This photograph shows the High Energy Astronomy Observatory (HEAO)-1 being assembled at TRW Systems of Redondo Beach, California. The HEAO was designed and developed by TRW, Inc. under the project management of the Marshall Space Flight Center. The first observatory, designated HEAO-1, was launched on August 12, 1977 aboard an Atlas/Centaur launch vehicle and was designed to survey the sky for additional x-ray and gamma-ray sources as well as pinpointing their positions. The HEAO-1 was...
Topics: What -- HEAO 1, Where -- California, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1379
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63
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
image
eye 63
favorite 0
comment 0
This photograph shows the High Energy Astronomy Observatory (HEAO)-3 being assembled at TRW, Inc. Designed and developed by TRW, Inc. under the direction of the Marshall Space Flight Center, the objectives of the HEAO-3 were to survey and map the celestial sphere for gamma-ray flux and make detailed measurements of cosmic-ray particles. It carried three scientific experiments: a gamma-ray spectrometer, a cosmic-ray isotope experiment, and a heavy cosmic-ray nuclei experiment. The HEAO-3 was...
Topics: What -- HEAO 3, What -- Spectrometer, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1570
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47
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
image
eye 47
favorite 0
comment 0
This photograph shows the High Energy Astronomy Observatory (HEAO)-1 being assembled at TRW Systems of Redondo Beach, California. The HEAO was designed and developed by TRW, Inc. under the project management of the Marshall Space Flight Center. The first observatory, designated HEAO-1, was launched on August 12, 1977 aboard an Atlas/Centaur launch vehicle and was designed to survey the sky for additional x-ray and gamma-ray sources as well as pinpointing their positions. The HEAO-1 was...
Topics: What -- HEAO 1, Where -- California, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1563
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68
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 68
favorite 1
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Like the Crab Nebula, the Vela Supernova Remnant has a radio pulsar at its center. In this image taken by the High Energy Astronomy Observatory (HEAO)-2/Einstein Observatory, the pulsar appears as a point source surrounded by weak and diffused emissions of x-rays. HEAO-2's computer processing system was able to record and display the total number of x-ray photons (a tiny bundle of radiant energy used as the fundamental unit of electromagnetic radiation) on a scale along the margin of the...
Topics: What -- Vela, What -- HEAO 2, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1558
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82
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 82
favorite 0
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This illustration is a schematic of the High Energy Astronomy Observatory (HEAO)-2 and its experiments. It shows the focal plane instruments (at the right) plus the associated electronics for operating the telescope as it transmitted its observations to the ground. A fifth instrument, the Monitor Proportional Counter, is located near the front of the telescope. Four separate astronomical instruments are located at the focus of this telescope and they could be interchanged for different types of...
Topics: What -- HEAO 2, What -- Spectrometer, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1386
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85
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
image
eye 85
favorite 0
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This is an x-ray image of the Crab Nebula taken with the High Energy Astronomy Observatory (HEAO)-2/Einstein Observatory. The image is demonstrated by a pulsar, which appears as a bright point due to its pulsed x-ray emissions. The strongest region of diffused emissions comes from just northwest of the pulsar, and corresponds closely to the region of brightest visible-light emission. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual...
Topics: What -- HEAO 2, What -- Visible Light, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1556
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292
May 23, 2011
05/11
by
Haering, Edward A., Jr.; Ehernberger, L. J.; Whitmore, Stephen A
texts
eye 292
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SR-71 sonic boom signatures were measured to validate sonic boom propagation prediction codes. An SR-71 aircraft generated sonic booms from Mach 1.25 to Mach 1.6, at altitudes of 31,000 to 48,000 ft, and at various gross weights. An F-16XL aircraft measured the SR-71 near-field shock waves from close to the aircraft to more than 8,000 ft below, gathering 105 signatures. A YO-3A aircraft measured the SR-71 sonic booms from 21,000 to 38,000 ft below, recording 17 passes. The sonic booms at ground...
Topics: GALACTIC CLUSTERS, X RAY SOURCES, HIGH TEMPERATURE GASES, CLOUDS, GALACTIC EVOLUTION, HEAO 2
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101
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
image
eye 101
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Both of the High Energy Astronomy Observatory (HEAO) 2/Einstein Observatory imaging devices were used to observe the Great Nebula in Andromeda, M31. This image is a wide field x-ray view of the center region of M31 by the HEAO-2's Imaging Proportional Counter. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual photographs of x-ray objects. Shortly after launch, the HEAO-2 was nicknamed the Einstein Observatory by its scientific experimenters...
Topics: What -- HEAO 2, What -- Andromeda, Where -- M31, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1557
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114
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
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eye 114
favorite 1
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This x-ray photograph of the Supernova remnant Cassiopeia A, taken with the High Energy Astronomy Observatory (HEAO) 2/Einstein Observatory, shows that the regions with fast moving knots of material in the expanding shell are bright and clear. A faint x-ray halo, just outside the bright shell, is interpreted as a shock wave moving ahead of the expanding debris. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual photographs of x-ray objects....
Topics: What -- Cassiopeia, What -- HEAO 2, What -- FAST, Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1567
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105
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
image
eye 105
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This supernova in the constellation Cassiopeia was observed by Tycho Brahe in 1572. In this x-ray image from the High Energy Astronomy Observatory (HEAO-2/Einstein Observatory produced by nearly a day of exposure time, the center region appears filled with emissions that can be resolved into patches or knots of material. However, no central pulsar or other collapsed object can be seen. The HEAO-2, the first imaging and largest x-ray telescope built to date, was capable of producing actual...
Topics: What -- Constellation, What -- Cassiopeia, What -- HEAO 2, Where -- Marshall Space Flight Center...
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1561
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61
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
image
eye 61
favorite 0
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This photograph is of the High Energy Astronomy Observatory (HEAO)-2 telescope being evaluated by engineers in the clean room of the X-Ray Calibration Facility at the Marshall Space Flight Center (MSFC). The MSFC was heavily engaged in the technical and scientific aspects, testing and calibration, of the HEAO-2 telescope The HEAO-2 was the first imaging and largest x-ray telescope built to date. The X-Ray Calibration Facility was built in 1976 for testing MSFC's HEAO-2. The facility is the...
Topics: What -- HEAO 2, What -- Hubble Space Telescope (HST), Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1549
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260
Jul 12, 2010
07/10
by
NON
texts
eye 260
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No Abstract Available
Topics: JUPITER (PLANET), PLANETARY RADIATION, X RAY ASTRONOMY, AURORAS, GALILEAN SATELLITES, HEAO 2,...
186
186
May 23, 2011
05/11
by
Bambah, Bindu A
texts
eye 186
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Using the 'quantum optical approach' we propose a model of multiplicity distributions in high energy collisions based on squeezed coherent states. We show that the k-mode squeezed coherent state is the most general one in describing hadronic multiplicity distributions in particle collision processes, describing not only p(bar-p) collisions but e()e(-), vp and diffractive collisions as well. The reason for this phenomenological fit has been gained by working out a microscopic theory in which the...
Topics: MICROWAVES, GALACTIC CLUSTERS, BACKGROUND RADIATION, GALACTIC RADIATION, COSMIC BACKGROUND EXPLORER...
The theory of solar gamma-ray line production is reviewed and new calculations of line production yields are presented. Observations, carried out with gamma-ray spectrometers on OSO-7, HEAO-1, HEAO-3 and SMM are reviewed and compared with theory. These observations provide direct evidence for nuclear reactions in flares and furnish unique information on particle acceleration and flare mechanisms.
Topics: NASA Technical Reports Server (NTRS), GAMMA RAY ASTRONOMY, NUCLEAR REACTIONS, PARTICLE...
The vibration, acoustic, and shock specification test criteria for spacecraft components and subassemblies and for the high Energy Astronomy Observatory (HEAO-C) experiments are presented. The HEAO-C was divided into zones and subzones to obtain simple component groupings. Zones are designated primarily to assist in determining the applicable specification. A subzone (general specification) is available for use when the location of the component is known but component design and weight are not...
Topics: NASA Technical Reports Server (NTRS), HEAO, SPACECRAFT, SPACECRAFT DESIGN, DESIGN ANALYSIS,...
71
71
Nov 19, 2009
11/09
by
NASA/Marshall Space Flight Center
image
eye 71
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This photograph is of the High Energy Astronomy Observatory (HEAO)-2 telescope being checked by engineers in the X-Ray Calibration Facility at the Marshall Space Flight Center (MSFC). The MSFC was heavily engaged in the technical and scientific aspects, testing and calibration, of the HEAO-2 telescope. The HEAO-2 was the first imaging and largest x-ray telescope built to date. The X-Ray Calibration Facility was built in 1976 for testing MSFC's HEAO-2. The facility is the world's largest, most...
Topics: What -- HEAO 2, What -- Hubble Space Telescope (HST), Where -- Marshall Space Flight Center (MSFC)
Source: http://mix.msfc.nasa.gov/abstracts.php?p=1548
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54
Sep 21, 2009
09/09
by
*Photo Credit:* Johns Hopkins University
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*Description*: Riccardo Giacconi, the "father of X-ray astronomy," has received the Nobel Prize in physics for "pioneering contributions to astrophysics," which have led to the discovery of cosmic X-ray sources. Giacconi, president of the Associated Universities Inc., in Washington, DC and Research Professor of Physics and Astronomy at Johns Hopkins University, Baltimore, MD discovered the first X-ray stars and the X-ray background in the 1960s and conceived of and led the...
Topics: What -- Discovery, What -- Uhuru, What -- HEAO 2, What -- Hubble Space Telescope (HST), Where --...
Source: http://hubblesite.org/newscenter/archive/releases/2002/26/image/a/
The number density of serendipitous sources in galactic plane Einstein Observatory IPC fields are compared with predictions based on the intensity of the HEAO-1 A2 unresolved hrd X-ray galactic ridge emission. It is concluded that theoretically predicted X-ray source populations of luminosity 8 x 10 to the 32nd power to 3 x 10 to the 34th power ergs s have 2 KeV to 10 KeV local surface densities of less than approximately .0008 L(32) pc/2 and are unlikely to be the dominant contributors to the...
Topics: NASA Technical Reports Server (NTRS), EMISSION SPECTRA, GALACTIC RADIATION, STELLAR RADIATION, X...
Topics: NASA Technical Reports Server (NTRS), EARTH ORBITS, HEAO, LAUNCHING, COMMAND AND CONTROL, DESIGN...
An in-progress investigation aimed at characterizing the X-ray luminosity of very faint QSOs is described. More than 100 faint, previously uncataloged QSOs which lie in areas imaged in X rays at very high sensitivity were discovered.
Topics: NASA Technical Reports Server (NTRS), HEAO 2, LUMINOSITY, X RAYS, IMAGING TECHNIQUES, QUASARS,...
Results concerning the research on photomultiplier tubes required for the HEAO program are reported. The general specifications are discussed for providing a series of tests for helping the operational reliability of its application, and for permitting comparison of performance of similar types, from various manufacturers.
Topics: NASA Technical Reports Server (NTRS), HEAO, PHOTOMULTIPLIER TUBES, RELIABILITY ANALYSIS, CERAMICS,...
Topics: NASA Technical Reports Server (NTRS), GAMMA RAY ASTRONOMY, HEAO 2, X RAY ASTRONOMY, INTERGALACTIC...
A sample of 25 QSOs was used to investigate the average spectrum between the soft X-ray energy band of the Einstein Observatory image proportional counter, and the higher energy band of the HEAO 1 A2 experiment. The spectrum is similar to thoe exhibited by Seyfert galaxies and narrow emission line galaxies above 2 keV. The spectrum is soft enough that if these objects are typical of the higher redshift, more radio-quiet QSOs, then it is possible to exclude QSOs as being the dominant origin of...
Topics: NASA Technical Reports Server (NTRS), BROADBAND, QUASARS, SEYFERT GALAXIES, X RAY SOURCES, X RAY...
The primary function of the study was to assess the impact upon the HEAO telecommunications system of the proposed relay satellite-to-ground-link configuration. The system is designed to perform the function of most of the NASA ground tracking and communications network at a net cost savings for NASA.
Topics: NASA Technical Reports Server (NTRS), HEAO, TDR SATELLITES, TELECOMMUNICATION, COST ESTIMATES,...
Environment criteria are presented for the High Energy Astronomy Observatory Program. Information in selected disciplinary areas is given for the region of space that is within 1000 km from the earth's surface.
Topics: NASA Technical Reports Server (NTRS), ENVIRONMENTAL ENGINEERING, HEAO, HUMAN FACTORS ENGINEERING,...
A high resolution spectrum of Cygnus X-1 in the 45 to 600 keV range is presented. The measurement was made by the HEAO 3 gamma ray spectrometer during 82 days in the fall of 1979 and spring of 1980, when the source was in its normal low state. Results of a search for narrow emission lines from the source are reported. The spectrum shows no significant narrow features. The 3 delta upper limit to a narrow 511 keV annihilation line is 3 x 0.0001 photons/sq cm/s. There is also no evidence in HEAO 3...
Topics: NASA Technical Reports Server (NTRS), EMISSION SPECTRA, GAMMA RAYS, HEAO 3, HIGH RESOLUTION, LINE...
The X-ray spectra of broad line active galactic nuclei (AGN) of all types (Seyfert I's, NELG's, broadline radio galaxies) are well fit by a power law in the .5 to 100 keV band of man energy slope alpha = .68 + or - .15. There is, as yet, no strong evidence for time variability of this slope in a given object. The constraints that this places on simple models of the central energy source are discussed. BL Lac objects have quite different X-ray spectral properties and show pronounced X-ray...
Topics: NASA Technical Reports Server (NTRS), ACTIVE GALACTIC NUCLEI, GALACTIC RADIATION, VARIABILITY, X...
During the period of this grant two main tasks were performed: a determination of a selection criterion for starburst galaxies most likely to emit X-rays, and performance of a pilot study of the X-ray emission from nine such systems. Starburst galaxies may be expected to emit flat-spectrum X-ray at energies above 10 keV resulting from the various remnants of the short-lived massive stars which characterize the starburst. The investigation to determine the optimum sample resulted in a change...
Topics: NASA Technical Reports Server (NTRS), BACKGROUND RADIATION, DISK GALAXIES, MASSIVE STARS, SKY...
An analysis and conceptual design of a baseline mission and spacecraft are presented. Aspects of the HEAO-C discussed include: baseline experiments with X-ray observations of space, analysis of mission requirements, observatory design, structural analysis, thermal control, attitude sensing and control system, communication and data handling, and space shuttle launch and retrieval of HEAO-C.
Topics: NASA Technical Reports Server (NTRS), HEAO, MISSION PLANNING, SCIENTIFIC SATELLITES, SPACECRAFT...
