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The first low radio frequency (<1.4 GHz) detection of the outburst of therecurrent nova RS Ophiuchi is presented in this letter. Radio emission wasdetected at 0.61 GHz on day 20 with a flux density of ~48 mJy and at 0.325 GHzon day 38 with a flux density of ~ 44 mJy. This is in contrast with the 1985outburst when it was not detected at 0.327 GHz even on day 66. The emission atlow radio frequencies is clearly non-thermal and is well-explained by asynchrotron spectrum of index alpha ~ -0.8 (S propto nu^alpha) sufferingforeground absorption due to the pre-existing, ionized, warm, clumpy red giantwind. The absence of low frequency radio emission in 1985 and the earlierturn-on of the radio flux in the current outburst are interpreted as being dueto higher foreground absorption in 1985 compared to that in 2006, suggestingthat the overlying wind densities in 2006 are only ~30% of those in 1985.

GMRT Observations of the 2006 outburst of the Nova RS Ophiuchi: First detection of emission at radio frequencies < 1.4 GHz