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  • 1
    Electronic Resource
    Electronic Resource
    Urokinase receptors in human monocytes
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Molecular Cell Research 1052 (1990), S. 399-407 
    Details
    ISSN: 0167-4889
    Keywords: (Human macrophage) ; (Human monocyte) ; Urokinase ; Urokinase receptor
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4889(90)90149-8
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Spectrophotometry of the unusual optical candidate for 3U 1728-24 (=GX 2+5 = GX 1+4) a recurrent nova? (1976)
    In:  CASI
    Details
    Publication Date: 2006-04-18
    Description: The spectrum of the object suggested as a possible optical counterpart of GX 2+5, was studied, using the image tube scanner attached to the 3-m telescope of Lick Observatory. An improved X-ray error box obtained with Copernicus strongly supports this proposed identification. The candidate displays all the characteristics of the symbiotic stars and the related recurrent novae. The spectrum reveals the presence of an M star together with a blue component and a large number of emission lines displaying a wide range of ionization. There is evidence of variability of both the continuum and the line intensities. This object provides strong support for the often proposed association of some X-ray sources with nova-like systems.
    Keywords: ASTRONOMY
    Type: NASA. Goddard Space Flight Center X-ray Binaries; p 691-701
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Absence of iron line emission in Cyg X-3 (1976)
    In:  CASI
    Details
    Publication Date: 2006-04-18
    Description: An observation of Cygnus X-3 was made with soft X-ray detectors launched on an Aerobee rocket. The iron line emission observed one month later and in May 1975 was not found. A 3 sigma upper limit for this feature is 0.006 ph/2 cm/s.
    Keywords: ASTRONOMY
    Type: NASA. Goddard Space Flight Center X-ray Binaries; p 285-292
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Review of results from the Hopkins Ultraviolet Telescope aboard the Astro-1 mission (1992)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The Hopkins Ultraviolet Telescope (HUT), flown aboard the Space Shuttle Columbia in the Astro-1 mission, provided the first spectrophotometry in the sub Kyman alpha region for many astronomical sources. Observations of 77 sources were made throughout the far ultraviolet (912 to 1850 A, delta lambda approximately 3 A), and for a few objects in the extreme ultraviolet (415 to 912 A, delta lambda approximately 1.5 A). Among the objects observed were quasars, galaxy clusters, active and normal galaxies, cataclysmic variables, globular clusters, supernova remnants, planetary nebulae, and white dwarfs.
    Keywords: ASTRONOMY
    Type: ESA, Environment Observation and Climate Modelling Through International Space Projects. Space Sciences with Particular Emphasis on High-Energy Astrophysics; p 105-110
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Rocket instrument for far-UV spectrophotometry of faint astronomical objects (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A sensitive sounding rocket instrument for moderate (about 10-A) resolution far-UV (1160-1750-A) spectrophotometry of faint astronomical objects has been developed. The instrument employes a photon-counting microchannel plate imaging detector and a concave grating spectrograph behind a 40-cm Dall-Kirkham telescope. A unique remote-control pointing system, incorporating an SIT vidicon aspect camera, two star trackers, and a tone-encoded command telemetry link, permits the telescope to be oriented to within 5 arc sec of any target for which suitable guide stars can be found. The design, construction, calibration, and flight performance of the instrument are discussed.
    Keywords: ASTRONOMY
    Type: Applied Optics; 19; Mar. 1
    Format: text
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  • 6
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    The Hopkins ultraviolet telescope (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The Shuttle is scheduled to carry the Hopkins UV Telescope (HUT) aloft in 1986. HUT will be one of three telescopes on the mission and will be sensitive to the 450-1800 A interval. Its primary goals will be observations of Halley's Comet, the planets, distant galaxies and quasars. It will be controlled by Spacelab personnel and features a 0.9 m primary mirror, a spectrograph on the focal plane, and an Si intensified image television camera for on-line image monitoring. The main component of the spectrograph will be a 1024 channel self-scanning Reticon photodiode array coupled by optic fibers to the microchannel detector plates. HUT is presently undergoing qualification testing.
    Keywords: ASTRONOMY
    Type: Johns Hopkins APL Technical Digest (ISSN 0270-5214); 6; 28-37
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  • 7
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    Optical and X-ray observations of the PSR 1913 + 16 field (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: We have obtained medium-resolution spectra in the yellow of seven stars in the error box of the binary radio pulsar PSR 1913 + 16, using the image-tube scanner at the Lick 3-m telescope. None of the objects is spectroscopically abnormal and thus a strong candidate for membership in the system. The data are used to establish the extinction in the field, which is modest for this low galactic latitude. For three of the stars, limits of the order V exceeding 23 mag on optical pulsations with the frequency of the radio pulsar are derived. X-ray observations of the field have been obtained in the 2.5-7.5 keV band, using the UCL experiment aboard OAO Copernicus. No source is detected, with a 2 sigma upper limit on the time-averaged flux of 1.0 times 10 to the -10th power ergs per sq cm per sec.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal; 200; Aug. 15
    Format: text
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  • 8
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    Optical pulsations in HZ Herculis. 5. Pulse-resolved spectrophotometry (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Digital spectra of HZ Herculis were obtained with 10 A resolution in the 3,600 - 6,000 A region, synchronously dividing the 1.24-s optical pulsation period into eight 155-ms phase bins. The optical pulses are detected in the data, but their fractional amplitude is only 0.08 percent, a factor of 4 less than typically observed. The separate spectra of each one-eighth of the pulse are identical to within the statistics of the observation. If the X-ray to optical pulse reprocessing mechanism concentrates the optical pulsations into discrete spectral line features, data require the pulses to be distributed among more than four such lines.
    Keywords: ASTRONOMY
    Type: NASA-CR-147107
    Format: application/pdf
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  • 9
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    The soft X-ray spectrum of the Perseus cluster (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The X-ray spectrum of the Perseus cluster in the range 0.1-4.0 keV has been observed. Contrary to the results of previous low-energy rocket observations, no large flux of soft X-rays was found. The X-ray spectrum from 0.1 to 56 keV is consistent with bremsstrahlung from an intracluster gas with T approximately equal to 100 million K. attenuated by the interstellar column density inferred from 21-cm observations. The low-energy X-ray spectrum is not consistent with a nonthermal power-law model with the same slope as that observed at higher energies. The mass of hot intracluster gas required to produce the observed X-ray flux is a small fraction of the gravitational binding mass. The soft X-ray flux, when combined with limits on the radio flux, implies that the cluster is not gravitationally bounded by ionized gas at any temperature.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal; 198; May 15
    Format: text
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  • 10
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    Rapid X-ray variability of PKS 2155-304 (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The X-ray emitting BL Lacertae object PKS 2155-304 was observed with NRL's Large Area Sky Survey Experiment on HEAO 1 during November 10-16, 1977. Variations of a factor of 2 in the 0.5-20 keV intensity are found on time scales as short as 6 hours. Variations on time scales of 1 s, as reported by the HEAO A-2 LED experiment, are not confirmed in near-simultaneous observations. Optical spectroscopy is also presented which does not confirm the presence of previously reported redshifted (Z = 0.17) forbidden O III line emission. The question of the redshift of this object is still open.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal; vol. 237
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