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. Author manuscript; available in PMC: 2018 May 30.
Published in final edited form as: Astrophys J Lett. 2017 Dec 21;851:L49. doi: 10.3847/2041-8213/aaa01b

Table 3.

Column density upper limits

Molecule Freq (GHz) rms1 (mK) NX2 (cm−2)
S2H2 139.885 9 <8.5×1011
HSO 158.391 30 <1.5×1012
HO2 130.260 11 <4.7×1011
H2O2   90.365 4 <1.0×1012
(1)

The rms has been calculated for a channel width of ≈0.3 km s−1. The obtained rms is similar in the two surveyed positions.

(2)

3σ upper limits assuming LTE, Trot=10 K and a linewidth of 0.6 km s−1