Astronomy and Astrophysics – Astronomy
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.1702s&link_type=abstract
American Astronomical Society, 200th AAS Meeting, #17.02; Bulletin of the American Astronomical Society, Vol. 34, p.668
Astronomy and Astrophysics
Astronomy
Scientific paper
A Chandra Director's Discretionary Program was carried out on January 29, 2002, to take a snapshot observation of each of the three most distant quasars known, at redshifts 5.82, 5.99, and 6.28. All three were significantly detected, even in these short, 6--8 Ksec exposures. Their X-ray to optical luminosity ratios are median values for high redshift, high luminosity quasars, indicating that quasars at higher L {X}/L {O} will be detectable if they exist at even larger redshifts. These observations hint at two exciting discoveries. An extended, or multiple, X-ray source 23'' from SDSS 1306+0356 is most likely a jet, emitting inverse Compton radiation from the Cosmic Microwave Background. SDSS 1030+0524 does not appear to be a point source, and according to the probabilities predicted by Wyithe and Loeb, may be a gravitationally lensed system. Both of these are signficant as X-ray detections, but the above interpretations require confirmation by longer observations. This work was supported by NASA contract NAS8-39073 to the Chandra X-ray Center.
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