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HD 3203


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Rocket ultraviolet imagery of the Andromeda galaxy
Far-UV electrographic imagery of M31 is presented which was obtainedduring a sounding-rocket flight with an electrographic Schmidt camerasensitive in the wavelength range from 1230 to 2000 A. The resolution inthe imagery is such that 50% of the energy from a point source isconfined within a circle 40 arcsec in radius. Two conspicuous featuresare observed in the UV image of M31: one corresponding to a brightassociation (NGC 206) in the SW region of the disk and one centered onthe galactic nucleus. Indications of the general spiral-arm structureare also evident. Absolute photometry and brightness distributions areobtained for the observed features, and both the central region and NGC206 are shown to be diffuse sources. It is found that the brightnessdistribution of the central region is a flat ellipse with its major axisclosely aligned with the major axis of the galaxy, which favors a sourcemodel consisting of young early-type stars close to the galactic planeand constitutes strong evidence against a nonthermal point source at thegalactic center.

The photometric standard +35 1.
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观测天体数据

星座:仙女座
右阿森松:00h35m30.43s
赤纬:+35°39'32.7"
视星:7.715
距离:174.825 天文距离
右阿森松适当运动:14
赤纬适当运动:-1.2
B-T magnitude:7.792
V-T magnitude:7.722

目录:
适当名称   (Edit)
HD 1989HD 3203
TYCHO-2 2000TYC 2274-71-1
USNO-A2.0USNO-A2 1200-00261956
HIPHIP 2783

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