1. Astrochemistry with the Upgraded Combined Array for Research in Millimeter-wave Astronomy D. N. Friedel Department of Astronomy University of Illinois

2. CARMA has been operating for several years observations @ 3mm and 1mm continuum and spectral line multipoint mosaics Present highlights of upgrades to the array (current and near future) Upgrades to: Antennas Receivers Correlator System

3. Antennas Incorporation of 8 x 3.5m antennas 23 total antennas – 6 x 10 m, 9 x 6.1 m, 8 x 3.5 m Observations at 1 cm, 3 mm, & 1 mm 253 baselines give large instantaneous u-v coverage Array configurations give resolutions of: 11” - 0.4” @ 3mm 5” - 0.17” @ 1mm 2.1' @ 1cm Paired Antenna Calibration System (PACS) uses 3.5 m antennas as “buddy” for larger antennas

4. New block downconverters – double the IF bandwidth 8 Ghz IF (each sideband) Large frequency coverage in 1 track Dual polarization @ 1 mm Circular polarization receivers Increased sensitivity (by √2) Allow observations of polarized continuum and spectral lines Receivers

5. Correlator New boards giving a total of 8 bands (16 windows) Bandwidths and resolutions: Any combination of bandwidths and LO frequencies (within IF) is possible Some projects are observing 90+ transitions from 16 molecular species at one time Minimizes calibration uncertainties between transitions

6. System Dual Science Subarrays Allows for 2 simultaneously operating subarrays 1 for spectral line or continuum, 1 for continuum only Antennas can be switched between subarrays via software Online passband calibration Automated data reduction pipeline All data from CARMA will be reduced by an automated system Applies all calibration and creates images

7. Upgrades and additions to the antennas are mostly complete Correlator is fully upgraded Receiver upgrades are to be complete by the end of the year System upgrades nearly complete The many upgrades to CARMA will allow more and varied science to be accomplished Next proposal call will be in September 2010 Summary