2289 20160706142138.0 DOI 10.1051/0004-6361/201014658 ASTROimport-446 Ladjal, D. 2010 Herschel PACS and SPIRE images have been obtained over a 30' × 30' area around the well-known carbon star CW Leo (IRC +10 216). An extended structure is found in an incomplete arc of 22' diameter, which is cospatial with the termination shock due to interaction with the interstellar medium (ISM) as defined by Sahai Chronopoulos from ultraviolet GALEX images. Fluxes are derived in the 70, 160, 250, 350, and 550 µm bands in the region where the interaction with the ISM takes place, and this can be fitted with a modified black body with a temperature of 25 ± 3 K. Using the published proper motion and radial velocity for the star, we derive a heliocentric space motion of 25.1 km s-1. Using the PACS and SPIRE data and the analytical formula of the bow shock structure, we infer a de-projected standoff distance of the bow shock of R0 = (8.0 ± 0.3) × 1017 cm. We also derive a relative velocity of the star with respect to the ISM of (106.6 ± 8.7)/v{n_ISM} km s-1, where nISM is the number density of the local ISM. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. Herschel PACS and SPIRE imaging of CW Leonis Barlow, M. J. Groenewegen, M. A. T. Ueta, T. Blommaert, J. A. D. L. Cohen, M. Decin, L. De Meester, W. Exter, K. Gear, W. K. Gomez, H. L. Hargrave, P. C. Huygen, R. Ivison, R. J. Jean, C. Kerschbaum, F. Leeks, S. J. Lim, T. L. Olofsson, G. Polehampton, E. Posch, T. Regibo, S. Royer, P. Sibthorpe, B. Swinyard, B. M. Vandenbussche, B. Waelkens, C. Wesson, R. L141 Astronomy and Astrophysics 518 2010 http://esoads.eso.org/abs/2010A%26A...518L.141L published in REFERD