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J/MNRAS/338/253      K extinction near the Galactic Centre        (Dutra+, 2003)

Extinction within 10 degrees of the Galactic Centre using 2MASS Dutra C.M., Santiago B.X., Bica E.L.D., Barbuy B. <Mon. Not. R. Astron. Soc. 338, 253 (2003)> =2003MNRAS.338..253D
ADC_Keywords: Interstellar medium ; Extinction ; Infrared sources Keywords: The Galaxy - interstellar medium - extinction - dust Description: We extract J and Ks magnitudes from the 2MASS Point Source Catalog for approximately 6 million stars with 8<Ks<13 in order to build an AK extinction map within 10 degrees of the Galactic centre. The extinction was determined by fitting the upper giant branch of (Ks, J-Ks) colour-magnitude diagrams to a dereddened upper giant branch mean locus built from previously studied Bulge fields. The extinction values vary from A_K=0.05 in the edges of the map up to A_K=3.2 close to the Galactic centre. The resulting extinction map is given in the file 'extmap.dat'. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file extmap.dat 30 32761 Extinction map (181 x 181 points)
See also: B/2mass : The 2MASS database (IPAC/UMass, 2000) II/62 : Catalogue of Extinction Data (Neckel+, 1980) II/114 : UV Interstellar Extinction (Savage+ 1985) J/A+A/349/L69 : Interstellar extinction towards inner Galactic Bulge (Schultheis+, 1999) J/A+A/359/347 : Reddening in open and globular clusters (Dutra+, 2000) J/A+A/383/631 : Catalogue of dust clouds in the Galaxy (Dutra+, 2002) Byte-by-byte Description of file: extmap.dat
Bytes Format Units Label Explanations
1- 6 F6.3 deg GLON [-6/6] Galactic longitude of the cell centre 9- 14 F6.3 deg GLAT [-6/6] Galactic latitude of the cell centre 16- 22 F7.3 mag AK K band extinction 25- 30 F6.3 mag e_AK Error in extinction determination
Acknowledgements: Carlos Dutra References: Dutra et al., Low-extinction windows in the inner Galactic Bulge, 2002A&A...381..219D
(End) Patricia Bauer [CDS] 24-Sep-2002
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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