spectra for this seemingly normal galaxy with a weird optical feature that is present in several different image sources
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by stansfoxy
http://dr12.sdss3.org/spectrumDetail?mjd=52426&fiber=614&plateid=911 - spectrum info for the object
http://portal.nersc.gov/project/cosmo/data/legacysurvey/dr2/coadd/204/2041m015/decals-2041m015-image.jpg - another source with a similar optical anomly over the same objectPosted
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by JeanTate in response to stansfoxy's comment.
http://dr12.sdss3.org/spectrumDetail?mjd=52426&fiber=614&plateid=911 - spectrum info for the object
Yep, that's the interactive spectrum of SDSS J133602.93-013631.0, with a redshift of 0.0146. The SDSS spectra pipeline classifies it as "GALAXY STARBURST", and that seems obvious: it has a "blue" continuum, and prominent H-alpha, H-beta, H-gamma emission lines, as well as the 'nebular' lines [SII], [NII], and [OIII] ([OII] likely too, but they're too far in the UV, due to the low redshift). And they're all narrow (if they were 'broad', that'd be evidence of an AGN).
http://portal.nersc.gov/project/cosmo/data/legacysurvey/dr2/coadd/204/2041m015/decals-2041m015-image.jpg - another source with a similar optical anomly over the same object
I'm not following you here, sorry. Can you point to the particular source, within this DECaLS field, which has "a similar optical anomly"?
Hope this helps, and happy hunting! 😃
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