SIMBAD references

We present the results of a spectral line survey from 138.3 to 150.7 GHz toward Orion-KL. The observations were made using the 14 m radio telescope of Taeduk Radio Astronomy Observatory. Typical system temperatures were between 500 and 700 K, with the sensitivity between 0.02 and 0.06 K in units of T^*_A. A total of 149 line spectra are detected in this survey. Fifty lines have been previously reported; however, we find 99 new detections. Among these new lines, 33 are ``unidentified'', while 66 are from molecular transitions with known identifications. There is no detection of H or He recombination lines. The identified spectra are from a total of 15 molecular species and their isotopic variants. In the range from 138.3 to 150.7 GHz, the strongest spectral line is the J=3-2 transition of the CS molecule, followed by transitions of H₂CO, CH₃OH, CH₃CN, and SO₂. Spectral lines from the large organic molecules such as CH₃OH, CH₃OCH₃, HCOOCH₃, C₂H₅CN, and CH₃CN are prominent, with 80% of the identified lines arising from transitions of these molecules. The rotational temperatures and column densities are derived using the standard rotation diagram analysis for CH₃OH (13CH₃OH), HCOOCH₃, CH₃CN, and SO₂ at 10-270 K and 0.2-20x10¹⁵ cm^–2. These estimates are fairly comparable to the values for the same molecules found in other frequency regions by other studies.