Richard Burg

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In the construction of an X-ray selected sample of galaxy clusters for cosmological studies, we have assembled a sample of 495 X-ray sources found to show extended X-ray emission in the first processing of the ROSAT All-Sky Survey. The sample covers the celestial region with declination δ ≥ 0◦ and galactic latitude |bII | ≥ 20 ◦ and comprises sources with a(More)
The Brattleboro rat carries as a recessive trait the inability to synthesize hypothalamic vasopressin and its related neurophysin but is able to synthesize oxytocin and its neurophysin. Brattleboro rats homozygous for this trait have no immunologically detectable circulating vasopressin and manifest a complete syndrome of diabetes insipidus, which is(More)
We present the rst results of a serendipitous search for clusters of galaxies in deep ROSAT-PSPC pointed observations at high galactic latitude. The survey is being carried out using a Wavelet based Detection Algorithm which is not biased against extended, low surface brightness sources. A new ux{diameter limited sample of 10 cluster candidates has been(More)
Gas chromatography was employed to identify the mercurial compound involved in the Iraq outbreak of organomercury poisoning. Only methylmercury was detected in human blood, hair, and tissues. The quantity of methylmercury present correlates well with the quantity of organic mercury determined by selective atomic absorption.
The ROSATDeep Survey in the LockmanHole is the most sensitive X-ray survey performed to date, encompassing an exposure time of 207 ksec with the PSPC and a total of 1.32 Msec with the HRI aboard ROSAT. Here we present the complete catalogue of 50 X-ray sources with PSPC fluxes (0.5-2 keV) above 5.5 × 10−15 erg cm−2 s−1. The optical identifications are(More)
In the construction of an X-ray selected sample of galaxy clusters for cosmological studies, we have assembled a sample of 495 X-ray sources found to show extended X-ray emission in the first processing of the ROSAT All-Sky Survey. The sample covers the celestial region with declination δ ≥ 0◦ and galactic latitude |bII | ≥ 20 ◦ and comprises sources with a(More)