TSIP (Telescope System Instrumentation Program) proposal February, 2005 Carnegie submission, on behalf of Magellan Consortium: “A Second, More Sensitive Mosaic CCD Camera for IMACS” P.I. Alan Dressler Co-I’s: Ian Thompson, Pat McCarthy, Alan Uomoto Requested amount: $962,106 Duration: 1 year Start: June, 2005

Three supporting arguments for the proposal: 1.Increase the throughput of IMACS f/2 (higher q.e. CCD’s) 2.Eliminate costly, risky swapping of existing Mosaic camera 3.Access to all f/4 and f/2 modes simply, rapidly f/4: imaging, high-res spectoscopy, MOE, GISMO f/2: mutlislit low- to med-res spectroscopy; IFU, MMTF

Science presented in support of proposal: IMACS Deep Survey (McCarthy et al.) z > 1.5 old population IMACS Cluster Building Survey (Oemler et al.) Cluster infall & galaxy evolution f/4 imaging arcsec/pixel, 0.35” FWHM over 15’ x 15’ field gravitational lensing (Zaritsky et al.) – dark matter probe and cosmology test, also using lensed SNe as tests of the cosmological model (multiply imaged with spectra) galaxy morphology at high-redshift MOE & GISMO – descriptions and scientific applications

Construction plan: Duplicate the mechanical and electrical construction of the existing IMACS Mosaic Camera built by Thompson & Burley (Lupino designs executed by Carnegie shops) CCDs to be provided by E2V Technlogies -- E2V was chosen over U of A proposal after extensive discussions with Mike Lesser E2V part # CCD42-90, 2K x 4K x 15µ, grade 1, $82,000 QE values above 80% between 5200Å and 8300Å, 55% at 9000Å, compared to 30% for SITe chips – substantial gain! E2V will mount and align 8 CCDs on platten for $50,000 Total cost of E2V contract is $706,000

Other included costs: second piezo stage and controller (24K$) 2 Cryotigers + compressor (32K$) Thompson, Burley, Estrada (electronics) Uomoto – project management Casillo, Kowal – mechanical fabrication Software -- Birk Total salaries, benefits, and overhead, plus electronics and all dewar parts = $256,106

Community Observing Time Full funding of this proposal would result in a return of 22 nights of Magellan Observations to the community, awarded through NOAO process These nights would be distributed over both Magellan telescopes, Baade and Clay, over moon phase and season, as is customary. The number of nights follows from the cost per night derived from current Magellan operating expenses. (Note that these have increased since a previous TSIP proposal.) Operation annual budget (FY 05/06) : $3,482,131 Required increase to operations budget $1,000,000 Additional annual Carnegie mountain operation costs: $ 939,182 Capital investment for two telescopes (amortized $3,665,250 over 20 years) Annual instrumentation costs for two telescopes $4,000,000 Total annual costs: $13,086,563 Number of nights available on two telescopes 590 Cost per night = $22,181