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  • ASTROPHYSICS  (819)
  • INSTRUMENTATION AND PHOTOGRAPHY  (724)
  • SPACE RADIATION  (683)
  • 1985-1989  (1.281)
  • 1970-1974  (945)
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  • 1
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    SMM X-ray polychromator (1988)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The range of observing and analysis programs accomplished with the X-Ray Polychromator (XRP) instruments during the decline of solar cycle 21 and the rise of the solar cycle 22 is summarized. Section 2 describes XRP operations and current status. This is meant as a guide on how the instrument is used to obtain data and what its capabilities are for potential users. The science section contains a series of representative abstracts from recently published papers on major XRP science topics. It is not meant to be a complete list but illustrates the type of science that can come from the analysis of the XRP data. There then follows a series of appendixes that summarize the major data bases that are available. Appendix A is a complete bibliography of papers and presentations produced using XRP data. Appendix B lists all the spectroscopic data accumulated by the Flat Crystal Spectrometer (FCS). Appendix C is a compilation of the XRP flare catalogue for events equivalent to a GOES C-level flare or greater. It lists the start, peak and end times as well as the peak Ca XIX flux.
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Materialart: NASA-CR-180791 , NAS 1.26:180791
    Format: application/pdf
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  • 2
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    Carbon monoxide detector (1973)
    In:  CASI
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: A sensitive carbon monoxide detector, developed specifically for spacecraft use, is described. An instrument range of 0 to 60 ppm CO in air was devised. The fuel cell type detector is used as a highly sensitive electrolysis cell for electrochemically detecting gases. The concept of an electrochemical CO detector is discussed and the CO oxidation behavior in phosphoric and sulfuric acid electrolytes is reported.
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Materialart: NASA-CR-120171
    Format: application/pdf
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  • 3
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    Occultation studies of the solar system (1986)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: Determination of the size, shape, mean density, and albedo of Ceres was made. Predictions for 133 occultations of bright stars occurring in 1986 and 1987 were completed and published, as have predictions of occultations of stars by Comet Halley. Twenty-nine mutual events involving Galilean satellites were observed at Flagstaff in 1985.
    Schlagwort(e): ASTROPHYSICS
    Materialart: NASA, Washington Reports of Planetary Astronomy, 1985; p 108-109
    Format: text
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  • 4
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    The molecular gas in the supernova remnant IC443 (1986)
    In:  CASI
    Details
    Publikationsdatum: 2016-06-07
    Beschreibung: Although a few highly perturbed regions characterized by gas motions with velocities larger than 20 km/s have been discovered during the last several years in the supernova remnant (SNR) IC 443, the nature of these perturbed clumps and their relationship to the quiescent molecular gas near the SNR remains unknown. In part, this is due to a lack of large-scale, high angular resolution observations. Therefore, a systematic survey of this SNR in the CO (J=1 yields 0) line has been conducted, covering a roughly 50' x 50' region spaced by 2'. The observations were made with the 14 m telescope of the Five College Radio Astronomy Observatory (FCRAO), which has a resolution of 45" and a single sideband receiver temperature of 200 K at 2.6 mm wavelength. Five new clumps were discovered, bringing the total number of known perturbed regions to eight. To study the physical structure of these clumps in more detail, more complete maps of the clumps have been made in both the CO(J=1 yields 0) and (J=2 yields 1) transitions with the FCRAO telescope. These maps show that the extent of perturbed gas in a typical clump is several arcmin, or a few pc at a distance of 1.5 kpc.
    Schlagwort(e): ASTROPHYSICS
    Materialart: NASA. Ames Research Center Summer School on Interstellar Processes: Abstracts of Contributed Papers; p 69-70
    Format: application/pdf
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  • 5
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    The missing bulge globular clusters in M31 - New optical candidates (1985)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: A new method to attack the question of the 'missing' globular clusters in the bulge of M31 is used. Image-processing techniques were used on 13 videocamera fields to obtain an accurate photometric census of stellar objects in M31's bulge down to a limiting B magnitude of 21. This luminosity distribution is compared with the Bahcall-Soneira model of galactic foreground stars. A statistically significant excess of bright images in the luminosity range of globular clusters at M31's distance is found. If the optical candidates considered prove to be globular clusters, they would double the number of known globular clusters in the surveyed region. The colors of a subsample of the candidates are the same as those of the known globular clusters. It is concluded that the previously observed flattening away from a de Vaucouleurs law in the radial distribution of M31 may be an observational selection effect. As an offshoot of this analysis, no evidence is found for very luminous stars in the inner bulge of M31. The lack of such stars indicates that there has not been active star formation (with a normal IMF) in the recent past. Coupled with the existence of many planetary nebulae in the bulge, this may strengthen the case for a galactic wind in M31's bulge.
    Schlagwort(e): ASTROPHYSICS
    Materialart: Astrophysical Journal, Part 1 (ISSN 0004-637X); 290; 140-153
    Format: text
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  • 6
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    Construction of the Soudan 2 detector (1985)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Progress in the construction of the Soudan 2 nucleon decay detector which is being built at the Soudan iron mine in Minnesota is discussed. The expected event rate and characteristics of low energy neutrino events, muon events, multiple muon events, and other cosmic ray phenomena are discussed.
    Schlagwort(e): SPACE RADIATION
    Materialart: HE-6.2-5 , 19th Intern. Cosmic Ray Conf - Vol. 8; p 267-270; NASA-CP-2376-VOL-8
    Format: application/pdf
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  • 7
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    Reference data for thermocouple materials below the ice point. (1972)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Beschreibung: Standard thermoelectric data have been determined for four thermocouple combinations used below the ice point: commercial types E, K, and T and the special combination of KP vs Au-0.07 at.% Fe. Power series coefficients necessary to generate E = f(T) data for these combinations are given. In addition, extensive tests were carried out to ascertain the variability between materials from different manufacturers. Typical wires processed for low-temperature usage often have slightly thermoelectric properties (up to 1%) from those, nominally identical, wires made for high-temperature applications. Generally, type E is the most satisfactory standardized commercial combination. The Au-0.07 at.% Fe material has been examined in particular detail, because it is not yet an ISA standard material. It has excellent sensitivity in the liquid helium/liquid hydrogen temperature range and a nearly linear thermovoltage at higher temperatures.
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Materialart: Symposium on Temperature; Jun 21, 1971 - Jun 24, 1971; Washington, DC
    Format: text
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  • 8
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    Calibration of capsule platinum resistance thermometers at the triple point of water. (1972)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-07-13
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Materialart: Symposium on Temperature; Jun 21, 1971 - Jun 24, 1971; Washington, DC
    Format: text
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  • 9
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    A magnetic bubble domain flight recorder (1974)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: A feasibility model of an all-electronic bubble memory system has been constructed. It uses a small 60k bit bubble recorder consisting of 6 chips of 10k bits each mounted in three separate packages operating as a FIFO at a 150 KHz bubble data rate. In addition to serving as a direct tape recorder replacement, the bubble recorder can be programmed for random access to each individual chip for ranom block access operation or for self-checking or by-passing any malfunctioning memory chip. Read and write operations can be performed asynchronously from very low frequency up to basic recording field frequency. A large 50M bit prototype is planned.
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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  • 10
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    Acceleration of trapped particles during a magnetic storm on 18 April 1965 (1971)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Acceleration of trapped particles during magnetic storm on 18 Apr. 1965 observed by Explorer 26
    Schlagwort(e): SPACE RADIATION
    Materialart: REDUCTION AND ANALYSIS OF PARTICLE DATA FROM EXPLORER 15 AND EXPLORER 26 28 FEB. 1971 (SEE N71-30919 18-29)
    Format: text
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