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most citedThe Infrared Array Camera (IRAC) for the Spitzer Space Telescope

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astro-ph2001★ 164 cited

The ROSAT Deep Survey: VI. X-ray sources and Optical identifications of the Ultra Deep Survey

I. Lehmann, G. Hasinger, M. Schmidt +10

We describe in this paper the ROSAT Ultra Deep Survey (UDS), an extension of the ROSAT Deep Survey (RDS) in the Lockman Hole. The UDS reaches a flux level of 1.2 x 10E-15 erg/cm2/s…