Volume 440, Number 2, September III 2005
|Page(s)||775 - 782|
|Section||Catalogs and data|
|Published online||01 September 2005|
The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI
Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
Radioastronomisches Institut der Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany e-mail: firstname.lastname@example.org
2 Sterrewacht Leiden, Postbus 9513, 2300 Leiden, The Netherlands
3 National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, Virginia 22903, USA e-mail: email@example.com
4 Delft University of Technology, Postbus 5, 2600 Delft, The Netherlands e-mail: L.Hartmann@TBM.TUDelft.nl
5 Instituto Argentino de Radioastronomía, c.c. 5, (1894) Villa Elisa, Argentina e-mail: [bajaja;arnal]@iar.unlp.edu.ar; firstname.lastname@example.org; email@example.com
6 Facultad de Ciencias Astronómicas y Geofísicas, UNLP, Av. Paseo del Bosque, s/n, 1900 La Plata, Argentina
Accepted: 3 March 2005
We present the final data release of observations of λ21-cm emission from Galactic neutral hydrogen over the entire sky, merging the Leiden/Dwingeloo Survey (LDS: Hartmann & Burton 1997, Atlas of Galactic Neutral Hydrogen) of the sky north of δ = -30° with the Instituto Argentino de Radioastronomía Survey (IAR: Arnal et al. 2000, A&AS, 142, 35; and Bajaja et al. 2005, A&A, 440, 767) of the sky south of δ = -25°. The angular resolution of the combined material is HPBW ~ . The LSR velocity coverage spans the interval -450 km s-1 to +400 km s-1, at a resolution of 1.3 km s-1. The data were corrected for stray radiation at the Institute for Radioastronomy of the University of Bonn, refining the original correction applied to the LDS. The rms brightness-temperature noise of the merged database is K. Residual errors in the profile wings due to defects in the correction for stray radiation are for most of the data below a level of mK. It would be necessary to construct a telescope with a main beam efficiency of % to achieve the same accuracy. The merged and refined material entering the LAB Survey of Galactic H i is intended to be a general resource useful to a wide range of studies of the physical and structural characteristices of the Galactic interstellar environment. The LAB Survey is the most sensitive Milky Way H i survey to date, with the most extensive coverage both spatially and kinematically.
Key words: surveys / radio lines: ISM / Galaxy: structure
© ESO, 2005
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