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Astron. Astrophys. 351, 472-476 (1999)

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2. Observations and data reduction

For both objects we observed small spectral ranges covering the positions of the OH lines at 34 µ, 53 [FORMULA] 115 µ, and 119 µ (rest frame wavelengths). With the LWS we took on-source and off-source spectra. The observational parameters are given in Table 1. The spectrum of IRAS 20100-4156 observed on Nov. 9th, 1996 seemed to show some emission roughly at the position of the 115 µ line, but the observational data were not conclusive. We therefore took in March 1998 an additional spectrum covering only the region of the 115 µ line. - For 3 Zw 35 we took in addition a low resolution spectrum covering the whole LWS range, in order to determine possible fringes.


Table 1. Observational parameters

The date were processed using the ISO spectral analysis package (ISAP).

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© European Southern Observatory (ESO) 1999

Online publication: November 3, 1999