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Using the NSF's Karl G. Jansky Very Large Array (VLA), we report sixdetections of CO(J=1-0) emission and one upper limit in z=2-3 galaxiesoriginally detected in higher-J CO emission in the Atacama Largesubmillimeter/Millimeter Array (ALMA) Spectroscopic Survey in the Hubble UltraDeep Field (ASPECS). From the CO(J=1-0) line strengths, we measure total coldmolecular gas masses of M_gas = 2.4-11.6 x 10^10 (alpha_CO/3.6) Msun. We alsomeasure a median CO(J=3-2) to CO(J=1-0) line brightness temperature ratio ofr_31 = 0.84 +/- 0.26, and a CO(J=7-6) to CO(J=1-0) ratio range of r_71 <0.05 to0.17. These results suggest that CO(J=3-2) selected galaxies may have a higherCO line excitation on average than CO(J=1-0) selected galaxies, based on thelimited, currently available samples from the ASPECS and VLA CO LuminosityDensity at High Redshift (COLDz) surveys. This implies that previous estimatesof the cosmic density of cold gas in galaxies based on CO(J=3-2) measurementsshould be revised down by a factor of ~=2 on average based on assumptionsregarding CO excitation alone. This correction further improves the agreementbetween the best currently existing constraints on the cold gas densityevolution across cosmic history from line scan surveys, and the impliedcharacteristic gas depletion times.

VLA-ALMA Spectroscopic Survey in the Hubble Ultra Deep Field (VLASPECS): Total Cold Gas Masses and CO Line Ratios for z=2-3 "Main Sequence" Galaxies