UBV photometry of SGP AGNs
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https://b2find.eudat.eu/dataset/9d477e8d-5c07-576c-bba5-b3daa5050656
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资源简介：
Spectra, position, magnitudes and colors are presented for 485 faint (B_J_<20.5) emission line objects selected with the ultraviolet-excess (UVX) criterion on a area of 24.6...
