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VIII/76     Leiden/Argentine/Bonn (LAB) Survey of Galactic HI  (Kalberla+ 2005)

Leiden/Argentine/Bonn (LAB) Survey of Galactic HI Kalberla P.M.W., Burton W.B., Hartmann D., Arnal E.M., Bajaja E., Morras R., Poeppel W.G.L. <Astron. Astrophys., 440, 775 (2005) > =2005A&A...440..775K
ADC_Keywords: H I data ; Interstellar medium; Surveys; Radio sources; Atlases Keywords: surveys - ISM: general - Galaxy: general - radio lines: ISM - ISM: clouds Description: The LAB survey contains the final data release of observations of 21-cm emission from Galactic neutral hydrogen over the entire sky, merging the Leiden/Dwingeloo Survey (LDS: Hartmann & Burton 1997, Cat. VIII/54) of the sky north of -30° with the Instituto Argentino de Radioastronomia Survey (IAR: Arnal et al. 2000A&AS..142...35A and Bajaja et al. 2005, Cat. VIII/75) of the sky south of -25°. The angular resolution of the combined material is HPBW ∼ 0.6°. The LSR velocity coverage spans the interval -450 km/s to +400 km/s, at a resolution of 1.3km/s. 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 0.07-0.09 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 20-40 mK. It would be necessary to construct a telescope with a main beam efficiency of ηMB>99% 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. The Survey is available as 3-D maps, with or without Hanning smoothing, covering the whole ±458km/s or limited to ±250km/s range. The resolution of the 3-D maps is 0.5° in galactic longitude and latitude, and up to 1km/s in velocity. The survey exists also as (b,v) maps at longitude intervals stepped by 0.5° -- these files supersedes the FITS files given in the Hartmann and Burton Atlas (Cat. VIII/54) File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file lab.fit 2880 161052 The LAB Survey (full velocity range, 1km/s resolution) labh.fit 2880 161052 The LAB Survey (full velocity range, Hanning smoothed, 1km/s resolution) lab2.fit 2880 80438 The LAB Survey (full velocity range, 2km/s resolution) lab250.fit 2880 87668 The LAB Survey (±250km/s range, 1km/s resolution) lab250h.fit 2880 87668 The LAB Survey (±250km/s range, Hanning smoothed, 1km/s resolution) lab250hs.fit 2880 87668 The LAB Survey (±250km/s range, Hanning smoothed, including stray radiation) bvmaps.dat 16 721 List of the 721 (v,b) maps in "bvmaps" subdirectory bvmaps/* 0 721 HI Maps for constant Galactic Longitude
See also: http://www.astro.uni-bonn.de/~webrai/german/tools_labsurvey.php : the LAB Home Page Byte-by-byte Description of file: bvmaps.dat
Bytes Format Units Label Explanations
1- 5 F5.1 deg GLON Galactic longitude of the map 7- 16 A10 --- FITSfile Name of fits file in "bvmaps" subdirectory, made of 893x361 points (±450km/s velocity range, ±90° galactic latitude range)
Acknowledgements: Peter Kalberla, Bonn University
(End) Francois Ochsenbein [CDS] 18-Jul-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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