Bahram Mobasher

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We have discovered 16 Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST ) and have used them to provide the first conclusive evidence for cosmic deceleration that preceded the current epoch of cosmic acceleration. These objects, discovered during the course of the GOODS ACS Treasury program, include 6 of the 7 highest redshift SNe Ia known,(More)
A comparative study of the rest-frame morphology and structural properties of optically selected starburst galaxies at redshift z . 1 is carried out using multi-waveband (BV iz) high resolution images taken by the Advanced Camera for Surveys (ACS) as part of the Great Observatories Origins Deep Survey (GOODS). We classify galaxies into starburst, early and(More)
We have discovered 21 new Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST ) and have used them to trace the history of cosmic expansion over the last 10 billion yr. These objects, which include 13 spectroscopically confirmed SNe Ia at z 1, were discovered during 14 epochs of reimaging of theGOODSfields North and South over 2 yr with the(More)
Based on observations obtained with the NASA/ESA Hubble Space Telescope obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under NASA contract NAS 5-26555; observations collected at the European Southern Observatory, Chile (ESO Programmes 168.A-0845, 64.O-0643,(More)
We present imaging data and photometry for the COSMOS survey in 15 photometric bands between 0.3 and 2.4 m. These include data taken on the Subaru 8.3 m telescope, the KPNO and CTIO 4 m telescopes, and the CFHT 3.6 m telescope. Special techniques are used to ensure that the relative photometric calibration is better than 1%across the field of view. The(More)
We present the first results from the Australia Telescope Large Area Survey, which consists of deep radio observations of a 3.7 deg field surrounding the Chandra Deep Field–South, largely coincident with the infrared Spitzer Wide-Area Infrared Extragalactic (SWIRE) Survey.We also list cross-identifications to infrared and optical photometry data from SWIRE,(More)