spectrum is a blue star, shape is a galaxy
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by
Budgieye
moderator
SDSS took spectrum of the star, because it thought that it was a galaxy. But it was a star overlapping a galaxy. See the spectral chart.
ObjID centered on galaxy, extended source, therefore a galaxy
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237665329853497363
ObjID centered on bright spot in extended source.
http://skyserver.sdss3.org/dr8/en/tools/explore/obj.asp?id=1237665329853497362
spectrum target is bright spot in galaxy
http://skyserver.sdss3.org/dr8/en/get/specById.asp?id=2219201826073372672
The spectral chart is a blue star. Maybe the software thought that it had targeted a blue galaxy? since there was a galaxy shape there.
Maybe the blue spot might have been a distant quasar, or blue "pea" star-forming galaxy, or lensed galaxy, or possibly supernova. But the spectrum says star in our Milky Way galaxy.
For more reading, see Spectra guide for Galaxy Zoo http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000ulp?page=3&comment_id=53fef2ee3d5a77490c0001b6
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