PT Journal AU Abbas, MM Mumma, MJ Kostiuk, T Buhl, D TI Sensitivity limits of an infrared heterodyne spectrometer for astrophysical applications: errata SO Applied Optics JI Appl. Opt. PY 1977 BP 2793 VL 16 IS 11 DI 10.1364/AO.16.002793 ER