ATCA search for 21 cm emission from a candidate damped Ly-

We report a deep search for 21 cm emission/absorption from the $z \sim 0.101$ candidate damped Lyman-α system towards PKS 0439-433, using the Australia Telescope Compact Array (ATCA). The spectrum shows a weak absorption feature -at the $3.3 \sigma$ level -which yields a lower limit of 730 K on the spin temperature of the system. No H