P Eisenhardt

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The Spitzer Space Telescope, NASA's Great Observatory for infrared astronomy, was launched 2003 August 25 and is returning excellent scientific data from its Earth-trailing solar orbit. Spitzer combines the intrinsic sensitivity achievable with a cryogenic telescope in space with the great imaging and spectroscopic power of modern detector arrays to provide(More)
Infrared source counts at wavelengths 3 < λ < 10 µm cover more than 10 magnitudes in source brightness, four orders of magnitude in surface density, and reach an integrated surface density of 10 5 sources deg −2. At m < 14 mag, most of the sources are Galactic stars, in agreement with models. After removal of Galactic stars, galaxy counts are consistent(More)
We briefly review our current knowledge of the space density of distant X-ray clusters as measured by several ROSAT serendipitous surveys. We compare old and new determinations of the cluster X-ray Luminosity Function (XLF) at increasing redshifts, addressing the controversial issue of the evolution of its high end. We use complete subsamples, drawn from(More)
  • Marc Davis, Sandra M Faber, Jeffrey A Newman, Andrew C Phillips, R S Ellis, C C Steidel +15 others
  • 2002
The DEIMOS spectrograph has now been installed on the Keck-II telescope and commissioning is nearly complete. The DEEP2 Redshift Survey, which will take approximately 120 nights at the Keck Observatory over a three year period and has been designed to utilize the power of DEIMOS, began in the summer of 2002. The multiplexing power and high efficiency of(More)
  • K S Dawson, G Aldering, R Amanullah, K Barbary, L F Barrientos, M Brodwin +29 others
  • 2009
We present a new survey strategy to discover and study high redshift Type Ia supernovae (SNe Ia) using the Hubble Space Telescope (HST). By targeting massive galaxy clusters at 0.9 < z < 1.5, we obtain a twofold improvement in the efficiency of finding SNe compared to an HST field survey and a factor of three improvement in the total yield of SN detections(More)
We present the results of a study on the properties and evolution of massive (M * > 10 11 M ⊙) galaxies at z ∼ 0.4 − 2 utilising Keck spectroscopy, Near-Infrared Palomar imaging, and Hubble, Chandra, and Spitzer data covering fields targeted by the DEEP2 galaxy spectroscopic survey. Our sample is K-band selected and stellar mass limited, based on wide-area(More)
The color-magnitude relation has been determined for the RDCS J0910+5422 cluster of galaxies at redshift z = 1.106. Cluster members were selected from HST Advanced Camera for Surveys (ACS) images, combined with ground–based near–IR imaging and optical spectroscopy. Postman et al. (2005) morphological classifications were used to identify the early-type(More)
We investigate the properties of massive galaxies at z ∼ 1 − 3.5 using Hubble Space Telescope observations at optical wavelengths, ground–based near–infrared (IR) imaging, and Spitzer Space Telescope observations at 3–24 µm. From K s –selected galaxies over a ≃ 130 arcmin 2 field in the southern Great Observatories Origins Deep Surveys (GOODS–S), we(More)
  • P Barmby, J.-S Huang, G G Fazio, J A Surace, R G Arendt, J L Hora +12 others
  • 2004
As part of the In-Orbit Checkout activities for the Spitzer Space Telescope, the IRAC team carried out a deep observation (average integration time ∼ 8 hours) of a field surrounding the bright QSO HS 1700+6416. This field contains several hundred z ∼ 3 Lyman-break galaxy candidates, and we report here on their mid-infrared properties, including the IRAC(More)