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  1. No Access

    Article

    Pulsed Gamma Rays from the Crab Nebula ?

    RECENTLY Vasseur et al.1 reported the possible detection of pulsed gamma emission above 50 MeV from the Crab Nebula. They analysed their data from two balloon flights and stated that the probability of the observ...

    J. P. DELVAILLE, B. MCBREEN in Nature (1970)

  2. No Access

    Article

    Discovery of an X-ray QSO

    WE report here the discovery of an X-ray emitting QSO, the first to be initially identified from X-ray observations. Previously, the only QSO known to be an X-ray source was 3C273 (refs 1 and 2). The new QSO h...

    G. R. RICKER, G. W. CLARKE, R. E. DOXSEY, R. G. DOWER, J. G. JERNIGAN… in Nature (1978)

  3. No Access

    Article

    Contribution of intermediate luminosity X-ray galaxies to the background: Anon 0945–30

    EVIDENCE that the galaxy A0945 – 30 is a new extragalactic X-ray source has been found from an analysis of rotating modulation collimator (RMC)1 quick-look data collected from 53 orbits of the SAS 3 X-ray observa...

    H. W. SCHNOPPER, M. DAVIS, J. P. DELVAILLE, M. J. GELLER, J. P. HUCHRA in Nature (1978)

  4. No Access

    Article

    Search for X-ray emission from AO0235+164

    THE BL Lacertae object, AO0235 + 164, is one of the best documented cases of the inverse-Compton scattering problem, that is, the brightness temperature of the emitting region, as implied by rapid variability ...

    BRIAN DENNISON, J. P. DELVAILLE, A. EPSTEIN, H. W. SCHNOPPER in Nature (1978)

  5. No Access

    Article

    Spectral observation of the soft x-ray background and of the north polar spur with solid state spectrometers

    The present results confirm the thermal nature of the interstellar soft X-ray emission and give rather clear evidence of the Oxygen and Carbon contribution.

    R. Rocchia, M. Arnaud, C. Blondel, C. Cheron, J. C. Christy… in Space Science Reviews (1981)