/ftp/cats/II/249



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II/249              WHAM Northern Sky Survey, V-1.1         (Haffner+, 2003)
The following files can be converted to FITS (extension .fit .fgz or .fiZ)
	catalog.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=II/249
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drwxr-xr-x 351 cats archive 8192 Mar 25 10:13 [Up] drwxr-xr-x 2 cats archive 312 Jan 12 2023 [TAR file] -rw-r--r-- 1 cats archive 461 Dec 19 2022 .message -r--r--r-- 1 cats archive 3905 Jan 24 2004 ReadMe -rw-r--r-- 1 cats archive 1017 Nov 12 2012 +footg5.gif -rw-r--r-- 1 cats archive 16685 Nov 12 2012 +footg8.gif -r--r--r-- 1 cats archive 353256 Aug 2 2003 catalog.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 44172492 Aug 2 2003 wham-11.fit.gz [Uncompressed]
Beginning of ReadMe : II/249 WHAM Northern Sky Survey, V-1.1 (Haffner+, 2003) ================================================================================ The Wisconsin H-Alpha Mapper Northern Sky Survey Haffner L.M., Reynolds R.J., Tufte S.L., Madsen G.J., Jaehnig K., Percival J.W. <Astrophys. J. Suppl. Ser. 149, 405 (2003)> =2003ApJS..149..405H ================================================================================ ADC_Keywords: Surveys ; Photometry, H-alpha Keywords: Galaxy: halo - H II regions - ISM: atoms - ISM: structure Description: The Wisconsin H-Alpha Mapper has been designed to produce a survey of H-Alpha emission from the interstellar medium (ISM) over the entire northern sky. The instrument combines a 0.6 meter telescope and a dual-etalon 15cm Fabry-Perot spectrometer. In the primary spectral mode, an exposure captures a 200km/s spectral region with 8-12km/s velocity resolution from a one-degree beam on the sky. With a large-aperture design and modern CCD technology, WHAM can detect Galactic emission as faint as 0.05 Rayleighs in a 30 second exposure. For gas at 10000K, this observed intensity corresponds to an emission measure of about 0.1cm^-6^pc, more than 10 million times fainter than the Orion Nebula.