Access to Astronomical Catalogues

Search catalogue
obsoleted
in preparation
catalog without ftp or VizieR link
VII/244A       Atlas and Catalog of Dark Clouds      (Dobashi+, 2005)

Atlas and Catalog of Dark Clouds Based on Digitized Sky Survey I Dobashi K., Uehara H., Kandori R., Sakurai T., Kaiden M., Umemoto T., Sato F. <Publ. Astron. Soc. Japan, 57, S1-S386 (2005)> =2005PASJ...57S...1D
ADC_Keywords: Molecular clouds ; Extinction ; Interstellar medium Keywords: ISM: cloud - ISM: dust - ISM: extinction Description: Here we release the first version of the atlas and catalog of dark clouds derived by using the optical database Digitized Sky Survey I (DSS). Applying a traditional star-count technique to 1043 plates contained in DSS, we have produced an Av map covering the entire region in the galactic latitude range |b|=<40°. The map was drawn at two different angular resolutions of 6' and 18', and is released in FITS format. Based on the Av map, we identified 2448 dark clouds and 2841 clumps located inside them. Physical parameters, such as the position, extent, and optical extinction, were measured for each of the clouds and clumps. We also searched for counterparts among already known dark clouds in the literature. The catalog of dark clouds presented here lists the cloud parameters as well as the counterparts. Printed version of the atlas and catalog was published in a special issue of Publications of the Astronomical Society of Japan (PASJ) in February 2005 (Dobashi et al., 2005, PASJ, 57, pp.S1-S386). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file hclumps.dat 88 5046 Catalog of dark clouds and clumps identified in the high-resolution Av map (hpbw=6') hassoc.dat 94 2460 List of associated dark clouds in the high-resolution Av map lclumps.dat 88 243 Catalog of dark clouds and clumps identified in the low-resolution Av map (hpbw=18') lassoc.dat 94 37 List of associated dark clouds in the low-resolution Av map
See also: http://astro.u-gakugei.ac.jp/~tenmon/Atlas/index.html : Catalog home page VII/7 : Lynds' Catalogue of Dark Nebulae (LDN) (Lynds 1962) V/112 : Catalog of Star-Forming Regions in the Galaxy (Avedisova, 2002) VII/191 : Catalogue of Southern Dark Clouds (Hartley+ 1986) VII/68 : Dark Nebulae and Globules for l=240-360deg (Feitzinger+ 1984) J/A+A/383/631 : Catalogue of dust clouds in the Galaxy (Dutra+, 2002) Byte-by-byte Description of file: hclumps.dat lclumps.dat
Bytes Format Units Label Explanations
1- 5 A5 --- TGU [LH0-9 ] Cloud designation (1) 7- 9 I3 --- Ncl ? Number of clumps in the cloud 11- 14 A4 --- Clump [P0-9 ] Sequential number (PNNN) of clump (1) 16- 21 F6.2 deg GLON Galactic longitude of the clouds and clumps 23- 28 F6.2 deg GLAT Galactic latitude of the clouds and clumps 30- 34 F5.2 deg dGLON Extent of the clouds and clumps in galactic longitude 36- 40 F5.2 deg dGLAT Extent of the clouds and clumps in galactic latitude 42- 49 E8.3 deg2 S Surface area of the clouds and clumps 51- 54 F4.1 mag Av Peak Av value of the clouds and clumps in the original Av map 56- 59 F4.1 mag Av2 ? Peak Av value of the clouds and clumps in the filtered Av map (2) 61- 65 F5.2 mag dAv ? Noise level (2) 67- 74 E8.3 mag.deg2 SAv Extinction integrated over the surface area in the original Av map 76- 83 E8.3 mag.deg2 SAv2 ? Extinction integrated over the surface area in the filtered Av map (2) 85- 86 I2 --- Nc Number of counterparts found in the literature 88 I1 --- Flag [0,1]? Flag for a large uncertainty due to a very small number of stars (=<2) found in the high-resolution (6') map; or a large cloud extending outside the Av map
Note (1): the cloud number starts by L or H (for low of high resolution), is followed by a sequence number, and eventually by a clump number. TGU stands for "Tokyo Gakugei University catalog". Note (2): in the high-resolution maps only (hpbw=6')
Byte-by-byte Description of file: hassoc.dat lassoc.dat
Bytes Format Units Label Explanations
1- 5 A5 --- TGU [LH0-9 ] Cloud designation 6- 9 A4 --- Clump [P0-9 ] Sequential number of the clump 13- 14 I2 --- Seq Sequential number for associated dark cloud 16- 94 A79 --- Names Names of associated dark clouds found in a list compiled by Dutra and Bica (J/A+A/383/631)
History: * 21-Jun-2005: Preparation of the ReadMe by Koichi Nakajima [ADAC] * 24-May-2007: Addition of 'L' and 'H' in the cloud designation, to differentiate the clouds found from the 2 resolutions.
(End) Koichi Nakajima [ADAC], Francois Ochsenbein [CDS] 21-Jun-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

catalogue service

© UDS/CNRS

Contact