A high sensitivity HI survey of the sky at δ ≤− 25 ◦ Final data release

We present the final data release of the high sensitivity λ  21-cm neutral hydrogen survey of the sky south of $\delta \le -25 \degr$. A total of 50 980 positions lying on a galactic coordinate grid with points spaced by ($\Delta l, \Delta b$) = (0$\fdg$5/cos b, 0$\fdg$5) were observed with the 30-m dish of the Instituto Argentino de Radioastronomia (IAR). The angular resolution of the survey is HPBW = 0$\fdg$5 and the velocity coverage spans the interval -450 ${\rm km\,s^{-1}}$ to +400 ${\rm km\,s^{-1}}$ (LSR). The velocity resolution is 1.27 ${\rm km\,s^{-1}}$ and the final rms noise of the entire database is 0.07 K. The data are corrected for stray radiation and converted to brightness temperatures.