A high sensitivity HI survey of the sky at delta <= -25: final data release

Abstract

We present the final data release of the high sensitivity λ 21-cm neutral hydrogen survey of the sky south of δ ≤ -25 °. A total of 50 980 positions lying on a galactic coordinate grid with points spaced by (Δ l, Δ b) = (0.5deg/cos b, 0.5deg) were observed with the 30-m dish of the Instituto Argentino de Radioastronomía (IAR). The angular resolution of the survey is HPBW = 0.5deg and the velocity coverage spans the interval -450 km s-1 to +400 km s-1 (LSR). The velocity resolution is 1.27 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.