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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-6pc, more than 10 million times fainter than the Orion Nebula. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 60 37565 WHAM Northern Sky Survey - V 1.1 2880 16400 *FITS version of the catalog
Note on this file includes the array of 101 intensities for the velocity range
See also: : WHAM Home Page Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
4- 10 F7.3 deg GLON Galactic Longitude 14- 20 F7.3 deg GLAT Galactic Latitude 24- 30 F7.3 2.4x10-7mW/m2/sr IHa Hα intensity (1) 36- 40 F5.3 2.4x10-7mW/m2/sr e_IHa Standard error of the intensity (1) (2) 47- 50 I4 -- Block Block designation of observation (3) 53- 60 F8.3 2.4x10-7mW/m2/sr Iori Original Intensity (4)
Note (1): 1 Rayleigh = 10+6/(4*pi)photons/cm2/s/sr = 2.4x10-7erg/cm2/s/sr at Hα. Note (2): Formal propagation only. This error does not reflect systematic issues discussed int the text. If listed as zero, the original observation is likely contaminated by a bright star (see text). The intensity listed in IHa is then an average of the nearest neighbors within one degree of the original. Note (3): The numeric block designation for this observation. Blocks of data are taken sequentially in time and are physically close on the sky (see text). Systematics remaining in the data are thus often linked to this parameter. Note (4): If column 3 represents the average of nearest neighbors (e_IHa=0; see Note 2), this column contains the original (unmodified) intensity for reference.
Acknowledgements: L.M. Haffner
(End) Patricia Bauer [CDS] 02-Aug-2003
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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