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  • Other Sources  (7)
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  • 1
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    Rosat observation of the 4U 1543-47 outburst in 1992 (1993)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Observation of 4U 1543-47 (HL Lupi) with the Rosat satellite on 21 Aug. 1992 with the PSPC (Position Sensitive Proportional Counter) and on 4 Sep. 1992 with the HRI (High Resolution Imager), four and five months after the soft X-ray transient outburst, respectively, is reported. Both observations revealed the source to be much brighter than expected from the decay rate at harder X-rays (deduced from BATSE (Gamma Ray Burst (GRB) instrument team for the Compton Gamma Ray Observatory) data). BATSE observations in Aug. 1992 do not show any significant increase in the hard X-ray flux, suggesting that the soft and hard X-ray fluxes are either decoupled or anticorrelated to some degree.
    Keywords: ASTRONOMY
    Type: Compton Symposium; Sep 01, 1993; Washington, DC; United States|Max-Planck-Inst. fuer Extraterrestrische Physik, Rosat Observation of the 4U 1543-47 Outburst in 1992 and Rosat and BATSE Observations of GRS 1915+105; 5 p
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  • 2
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    High resolution X-ray scattering measurements (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The results of high angular resolution grazing incidence scattering measurements of highly polished, coated optical flats in the X-ray spectral range of 1.5 to 6.4 keV are reported. The interpretation of these results in terms of surface microtopography is presented and the implications for grazing incidence X-ray imaging are discussed.
    Keywords: OPTICS
    Type: High resolution soft X-ray optics; Nov 18, 1981 - Nov 20, 1981; Brookhaven, NY
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  • 3
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    An association between a long-period pulsar and an old supernova remnant (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: A possible association between pulsar 2334 + 61, with a relatively long period of 0.5 s, and G114.3 + 0.3, a fairly old SNR is reported. The flat spectral index of -0.36 +/- 0.03 and large fractional polariazation suggest that the radio emission is powered by the pulsar. If so, the pulsar must have been born with a relatively short period of less than 100 ms. As the SNR is not particularly unusual morphologically, there might be many more such SNRs containing pulsars that are not beamed towards us.
    Keywords: ASTROPHYSICS
    Type: Nature (ISSN 0028-0836); 362; 6416; p. 135-137.
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  • 4
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    ART-XC: A Medium-energy X-ray Telescope System for the Spectrum-R-Gamma Mission (2008)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The ART-XC instrument is an X-ray grazing-incidence telescope system in an ABRIXAS-type optical configuration optimized for the survey observational mode of the Spectrum-RG astrophysical mission which is scheduled to be launched in 2011. ART-XC has two units, each equipped with four identical X-ray multi-shell mirror modules. The optical axes of the individual mirror modules are not parallel but are separated by several degrees to permit the four modules to share a single CCD focal plane detector, 1/4 of the area each. The 450-micron-thick pnCCD (similar to the adjacent eROSITA telescope detector) will allow detection of X-ray photons up to 15 keV. The field of view of the individual mirror module is about 18 x 18 arcminutes(exp 2) and the sensitivity of the ART-XC system for 4 years of survey will be better than 10(exp -12) erg s(exp -1) cm(exp -2) over the 4-12 keV energy band. This will allow the ART-XC instrument to discover several thousand new AGNs.
    Keywords: Optics
    Type: SPIE Conference; Jun 21, 2008 - Jun 29, 2008; Marseille; France
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  • 5
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    ART: Surveying the Local Universe at 2-11 keV (2008)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Astronomical Rontgen Telescope (ART) is a medium-energy x-ray telescope system proposed for the Russian-led mission Spectrum Rontgen-Gamma (SRG). Optimized for performance over the 2-11-keV band, ART complements the softer response of the SRG prime instrument-the German eROSITA x-ray telescope system. The anticipated number of ART detections is 50,000-with 1,000 heavily-obscured (N(sub H)〉 3x10(exp 23)/sq cm) AGN-in the SRG 4-year all-sky survey, plus a comparable number in deeper wide-field (500 deg(sup 2) total) surveys. ART's surveys will provide a minimally-biased, nearly-complete census of the local Universe in the medium-energy x-ray band (including Fe-K lines), at CCD spectral resolution. During long (approx.100-ks) pointed observations, ART can obtain statistically significant spectral data up to about 15 keY for bright sources and medium-energy x-ray continuum and Fe-K-line spectra of AGN detected with the contemporaneous NuSTAR hard-x-ray mission.
    Keywords: Astronomy
    Type: HEAD 2008: High-Energy Astrophysics Division Head of the American Astronomical Society; Mar 31, 2008 - Apr 03, 2008; Los Angeles, CA; United States
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  • 6
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    Calibration of the Rosat High Resolution Imager (HRI) (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The microchannel plate-based High Resolution Imager (HRI) is one of the focal plane instruments of the Rosat X-ray telescope that was launched on 1 June 1990. The calibration of the HRI is reported and preliminary results from the in-orbit calibration are presented. The quantum efficiency of the detector has been determined as a function of energy, the spatial variation of quantum efficiency, geometric nonlinearities, background, imaging performance, and UV sensitivity. Results of periodic tests of the temporal stability of the instrument are also reported.
    Keywords: SPACECRAFT INSTRUMENTATION
    Type: EUV, X-ray and Gamma-Ray Instrumentation for Astronomy; Jul 11, 1990 - Jul 13, 1990; San Diego, CA; United States
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  • 7
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    G359.23-0.92, the Mouse, a pulsar powered bow shock? (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: We have discovered a faint X-ray object coincident with the head of the 'Mouse' (G359.23-0.82), a member of the rare class of axially symmetric radio nebula. Such objects are believed to be excited by a fast moving central source which supplies relativistic particles that emit the observed non-thermal radiation. The origin of most such objects and the Mouse in particular is obscure. We argue that the Mouse is the wake left by a young pulsar rather than an accreting binary, a popular model for this class. On phenomenological grounds we suggest that the Mouse is similar in some ways to the bow shock of the moderately young pulsar 1951+32 embedded in the supernova remnant CTB80. The rarity of Mouse-like nebulae is puzzling and can only be explained by assuming that most pulsars are in low density media.
    Keywords: ASTROPHYSICS
    Type: Astronomy and Astrophysics (ISSN 0004-6361); 294; 2; p. L29-L31
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