The ROSAT Deep Survey IV. A distant lensing cluster of galaxies with a bright arc

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dc.creatorHasinger, G.
dc.creatorGiacconi, R.
dc.creatorGunn, J. E.
dc.creatorLehmann, I.
dc.creatorSchmidt, M.
dc.creatorSchneider, D. P.
dc.creatorTruemper, J.
dc.creatorWambsganss, J.
dc.creatorWoods, D.
dc.creatorZamorani, G.
dc.date1998-10-21
dc.date.accessioned2026-07-07T02:28:40Z
dc.date.available2026-07-07T02:28:40Z
dc.descriptionAn unusual double-lobed extended X-ray source (RX J105343+5735) is detected in the ROSAT ultra-deep HRI image of the Lockman Hole. The angular size of the source is 1.7 X 0.7 arcmin^2 and its X-ray flux is 2 X 10^-14 erg cm^-2 s^-1. R-band imaging from the Keck telescope revealed a marginal excess of galaxies brighter than R=24.5, but Keck LRIS spectroscopy of 24 objects around the X-ray centroid did not yield a significant number of concordant redshifts. The brightest galaxy close to the centre of the eastern emission peak appears to be a gravitationally lensed arc at z=2.570, suggesting that the X-ray object is associated with the lens, most likely a cluster of galaxies. Based on a comparison of lensing surface mass density, X-ray luminosity, morphology and galaxy magnitudes with clusters of known distance, we argue that RX J105343+5735 is a cluster at a redshift around 1. Future X-ray, ground-based optical/NIR and high resolution HST observations of the system will be able to clarify the nature of the object.
dc.descriptionAccepted for publication in A&A letters, 4 pages, LaTeX text, 2 postscript figures, psfig.sty and l-aa.sty
dc.identifierhttps://arxiv.org/abs/astro-ph/9810347
dc.identifierhttp://arxiv.org/abs/astro-ph/9810347
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/13163
dc.subjectAstrophysics
dc.titleThe ROSAT Deep Survey IV. A distant lensing cluster of galaxies with a bright arc
dc.typetext

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