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BAO Radio - US team members

BAO Radio - US team members. Carnegie-Mellon: Jeff Peterson, Kevin Bandura (at McGill), Tabitha Voytek , Bruce Taylor Pittsburgh Cylinder Prototype (PCT ), Feed/LNA development, correlator Fermilab : Scott Dodelson , Nick Gnedin , John Marriner , Dave McGinnis, Ralph

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BAO Radio - US team members

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  1. BAO Radio - US team members Carnegie-Mellon: Jeff Peterson, Kevin Bandura (at McGill), Tabitha Voytek, Bruce Taylor Pittsburgh Cylinder Prototype (PCT), Feed/LNA development, correlator Fermilab: Scott Dodelson, Nick Gnedin, John Marriner, Dave McGinnis, Ralph Pasquinelli, Vic Scarpine, Hee-Jong Seo (now at UCB), Albert Stebbins, Jason Steen, and Chris Stoughton instrument design and optimization, sensitivity projections, cost studies, foregrounds and calibration University of Wisconsin-Madison: Peter Timbie, Le Zhang Feed design, power spectrum recovery simulations, correlator

  2. Pittsburgh CRT • 2 cylinders • 32 dipole feeds/channels/cyl • 50 MHz BW • 64-channel software correlator +90° 25 m Dec -13° 10 m 25 m 2h 30m 16h RA

  3. Feed Antennas/LNAs • For cylinders – crossed slots, ‘4-square’ • For dishes – sleeve dipole 4-square for SKAMP

  4. Simulations/projections • FermiLab: Seo et al. ApJ 721(1), 164 (2010) • 2 • UW/Brown(Tucker)/Richmond (Bunn)/ IAP (Wandelt): power spectrum estimation with ‘Gibbs sampler’ 256 dual-polarization feeds/cylinder

  5. Proposed GPU Correlator

  6.  (1) Interferometers not being sensitive to small variation of Tsys (signal cross-correlations)  (2) Developments done at Pittsburgh (Cylinders) and in France (electronics, dishes ...)  (3) Possibility to have a phased deployment and future extensibility     >>> Phase 1 :   15x15 m^2 or 20x20 m^2 , and 32 or 48 channels (dual polarisation)     6 months to one year observations        Starting with the existing electronic (250 MHz) and software correlator, developping the GPU correlator and data analysis software       Science goal :  Optical - radio cross correlation signal    >>> Phase 2 :  6 or 8 times bigger , 50x50 m^2 , ~ 200 channels   (dual polarisation)    ~ 1.5 to 2 years observations       Better understanding of the foregrounds and component separation      Enhancement of the electronic chain - maybe reaching > 500 MHz bandwidth ??      Science goal :   BAO at 21 cm around z ~ 0.7 - 1.0 ??   >>> Phase 3 :  5  times bigger , 100x100 m^2 , ~ 1000 channels   (dual polarisation)    ~ 2 to 3 years observations , possibly with larger bandwidth > 500 MHz bandwidth

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