1. Name: The CO-to-H2 conversion factor Tatematsu, K., Nakai, N., et al. 2. One short paragraph with science goal(s) Indirect measurement of the mass of molecular gas from CO(1-0) intensity. Of prime importance for all CO observations of any galaxies. The conversion factor will be determined by using virial mass analysis appling to individual molecular clouds. How different (or common) is the factor at various enviroment with different metalicities, arms/interarms, galactic centers, et al.? 3. Number of sources 6, from early to late type galaxies 4. Coordinates: 4.1. all over the sky (probably) 4.2. Moving target: no 4.3. Time critical: no CO J=1-0 imaging: ---------------- 5. Spatial scales: 5.1. Angular resolution (arcsec): 0.2" (5 pc at 5 Mpc) 5.2. Range of spatial scales/FOV (arcsec): three fields for each galaxies 5.3. Single dish total power data: yes 5.4. ACA: yes 5.5. Subarrays: no 6. Frequencies: 6.1. Receiver band: Band 3 6.2. Lines and Frequencies (GHz): CO 115.0 GHz (redshifted for 5 Mpc and Ho = 75) 6.3. Spectral resolution (km/s): 2 km/s 6.4. Bandwidth or spectral coverage (km/s or GHz): 1000 km/s max 8. Line intensity: 8.1. Typical value (K or Jy): 5 - 10 K 8.2. Required rms per channel (K or Jy): 0.7 K 8.3. Spectral dynamic range: 10 9. Polarization: no 10. Integration time for each observing mode/receiver setting (hr): 9.4 hr per a field of a galaxy 11. Total integration time for program (hr): 9.4 x 3 x 6 = 169 hours 12. Comments on observing strategy (e.g. line surveys, Target of Opportunity, Sun, ...): (optional) Limit to only galaxies located at <5 Mpc to satisfy enough velocity resolution, spatial resolution, and sensitivity for reasonable total observing time. Will be important to observe early to extremely late type galaxies and inner to outer disks of a galaxy. So four field in each galaxy and different type of ten galaxies would be needed. ******************************************************************** Review Chris Carilli: this is duplicate of 1.7.3 could combine or assume two groups are doing competing experiments. Comment Ewine: leave both program is DRSP, since there will be several attempts to do this