An Upper Limit on the Contribution of Galactic Free-Free Emission to the Cosmic Microwave Background Near the North Celestial Pole

We have observed the region of the sky north of 81° declination with a wide-angle CCD camera and narrow-band (1 nm) Hα filter. After subtracting the stellar background using off-band images and smoothing to 0.̊1 resolution, we set an upper limit on the anisotropy in the Hα emission at this angular s...

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Veröffentlicht in:	Publications of the Astronomical Society of the Pacific 1996-04, Vol.108 (722), p.351-355
Hauptverfasser:	Gaustad, John E., McCullough, Peter R., Van Buren, Dave
Format:	Artikel
Sprache:	eng
Schlagworte:	Anisotropy Cosmic microwave background radiation Declination Image filters Interstellar Medium and Nebulae Microwaves North celestial pole Observatories Optical filters Pixels Stars
Online-Zugang:	Volltext
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