We present in this letter a high resolution ( 22 ” FWHM ) extended map at 2.1mm of the Sunyaev-Zel ’ dovich effect toward the most luminous X-ray cluster , RXJ1347-1145 .
These observations have been performed with the DIABOLO photometer working at the focus of the 30m IRAM radiotelescope .
We have derived a projected gas mass of ( 1.1 \pm 0.1 ) \times 10 ^ { 14 } h _ { 50 } ^ { -5 / 2 } M _ { \odot } within an angular radius of \theta = 74 ^ { \prime \prime } ( ie : projected radius of 0.6 Mpc , H _ { 0 } = 50 km/s/Mpc , \Omega _ { m } = 0.3 , \Omega _ { \Lambda } = 0.7 ) .
This result matches very well the expected gas mass from the cluster models of X-ray data .
With an unprecedented sensitivity level our measurement does not show significant departure from a spherical distribution .
The data analysis also allows us to characterize the 2.1mm flux of a well known radio source lying in the center of the cluster : F _ { RS } ( 2.1 \textrm { mm } ) = 5.7 \pm 1.6 mJy .