ZSpec A Dispersive MillimeterWave Spectrometer Jason Glenn From

Z-Spec: A Dispersive Millimeter-Wave Spectrometer Jason Glenn From Z-Machines to ALMA! Caltech CEA Colorado Bret Naylor Lionel Duband James Aguirre Jonas Zmuidzinas Lieko Earle Jason Glenn Cardiff Phil Maloney Peter Ade Corey Wood JPL ISAS Jamie Bock Hideo Matsuhara Matt Bradford Mark Dragovan Hien Nguyen

Bolocam 1. 1 mm Galaxy Surveys The Lockman Hole COSMOS (Aguirre et al. , 2006) (Laurent et al. , 2005; Maloney et al. , 2005; Laurent et al. , 2006)

350 m Follow Up & Photometric Redshifts 5 Galaxies All redshifted to z=2 (Laurent et al. , 2006) Based on 5 galaxies with published spectroscopic redshifts: • Photometric redshifts based on radio/FIR correlation appear to be too large by z 1 (1. 4 GHz too low) • One spectroscopic misidentification out of five?

Ultimate Science Goal: High-z CO Lines Model Spectrum with CO Rotational Ladder Z-Spec bandpass in the galaxy rest frame as a function of redshift

Overall Instrument Description 3 He/4 He Fridge 60 m. K ADR Feedhorn input • Observations from the CSO Wa. FIRS Grating: 62 × 48 × 3. 3 cm • = 1. 0 to 1. 5 mm • Waveguide-coupled diffraction grating • Resolution element: ~ 900 MHz Velocity resolution: ~ 1000 km s-1 • 160 Si 3 N 4 micromesh NTD Ge bolometers (BLIP NEP 10 -17 W Hz-1/2 design NEP = 4× 10 -18) • Technology demonstration for future orbital missions: SPICA (BLISS), SAFIR, & CCAT (Salt pill courtesy Peter Timbie’s group)

Waveguide-Coupled Grating & Bolometers are mounted on keys with reflecting backshorts The parallel plate grating diffracts and focuses incoming radiation Waveguide “bend blocks” couple radiation from the parallel plate waveguide to the bolometers Single broadband corrugated input feed

Assembled

Z-Spec at the CSO June 2005 Arrival Beam maps!

First Light!

ULIRG Line Survey • Aiming to reach BLIP limit soon • ULIRG survey to begin in spring 2006 with submillimeter galaxies to follow • IRAM 30 m?