/ftp/cats/III/170B



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III/170B    IRAS Point Source Identifications (MacConnell, 1993; rev. 2009)
The following files can be converted to FITS (extension .fit or fit.gz)
	ps_class.dat mac_iras.dat ps_id.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=III/170B
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drwxr-xr-x 259 cats archive 8192 Dec 5 19:00 [Up] drwxr-xr-x 4 cats archive 4096 Jun 29 2023 [TAR file] -rw-r--r-- 1 cats archive 483 Jun 29 2023 .message -r--r--r-- 1 cats archive 17793 Sep 12 2014 ReadMe -rw-r--r-- 1 cats archive 1242 Jun 29 2023 +footg5.gif -rw-r--r-- 1 cats archive 5611 Jun 29 2023 +footg8.gif -r--r--r-- 1 cats archive 1148628 Aug 26 2010 mac_iras.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 2432 Aug 26 2010 notes.htx -r--r--r-- 1 cats archive 729296 Aug 6 2009 ps_class.dat [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 993440 May 2 1994 ps_id.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : III/170B IRAS Point Source Identifications (MacConnell, 1993; rev. 2009) ================================================================================ IRAS Point Sources of flux at 12 microns greater than flux at 25 microns and falling within about 7 degrees of the Galactic Plane MacConnell D. J. <(unpublished, 1993; revised 2009)> =1993yCat.3170.....M ================================================================================ ADC_Keywords: Infrared sources ; Stars, late-type ; Cross identifications Abstract: The file "ps_class.dat" is an ASCII text file containing the classifications of 14,192 IRAS Point Sources with the flux at 12mum greater than the flux at 25mum and falling within about 7deg of the galactic plane. The aim has been to provide classifications of IRAS-PS with no previous associations, so most bright stars such as in the BSC, SAO, and HD which have associations and good spectral types are not included. Also, many known carbon stars from the catalogue of Stephenson known to be associated with PS are not included. Introduction: Most of the sources are south of the celestial equator and have been classified in increasing galactic longitude over the period Sept. 1985 to May 1992. They have been classified on Kodak I-N objective-prism plates taken primarily with the Curtis Schmidt telescope at Cerro Tololo, but some northern plates taken with the Burrell Schmidt at Kitt Peak were also used for classification. The spectra cover the range 680-880nm at a dispersion of 340nm/mm at the A-band, and the plate scale is 96.6"/mm. They are ideal for classifying M stars of type M3 and cooler (increasing strength of TiO and VO bands) and carbon stars (CN bands), but stars warmer than M2 and most S stars cannot be classified or identified as such. The M stars M3 and cooler can be separated into about five groups. The limiting mag of the deepest plates is I about 13.5. The IRAS PS were identified on transparent overlays made to the plate scale for each plate center, and the association of a spectrum with a given PS is usually unambiguous. In cases of doubt or offset, a comment is made. Note that there are some cases where the PSC gives an incorrect association on the basis of position, and the correct association is with a faint, uncatalogued M star.