Processing SMA Data
1.2 m Telescopes
The 1.2 meter Millimeter-Wave Telescope at the CfA has been studying the
distribution and properties of dense, star-forming molecular clouds in
our Galaxy and its nearest neighbors for over three decades. The
telescope was operated from a Columbia University rooftop overlooking
the Manhattan skyline for over 10 years before being moved to the CfA in
1986. A twin instrument was constructed at Columbia and shipped to
Cerro Tololo, Chile in 1982. Together, these two instruments have
obtained what is by far the most extensive, uniform, and widely-used
Galactic survey of interstellar carbon monoxide (CO), the best general
tracer of the largely invisible molecular hydrogen that constitutes most
of the mass in molecular clouds.
This archive contains essentially all of the data presented in the 2001 paper as raw, interpolated, and noise-suppressed v-l-b FITS cubes as well as lb, lv, and bv integrated images (jpg). Most of the 37 individual surveys listed in Table 1 of DHT01 are available (see Individual Surveys), as are larger, composite FITS cubes covering the entire Galaxy (see Compsite Surveys). An explanation of the noise-suppression technique used for the so-called moment-masked cubes is also available (see Moment Masking). Also included is the CO survey of the entire northern sky described in Dame & Thaddeus 2022 (see Northern Sky Survey).