Outflow forces of low-mass embedded objects in Ophiuchus: a quantitative comparison of analysis methodsN. van der Marel, L. E. Kristensen, R. Visser, J. C. Mottram, U. A. Yıldız and E. F. van DishoeckA&A, 556 (2013) A76DOI: https://doi.org/10.1051/0004-6361/201220717