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Subject
- active galactic nuclei6
- agn3
- apparent magnitude2
- astrometry1
- astronomical object identification3
- bl lacertae objects1
- catalogs3
- ccd photometry1
- cluster of galaxies5
- dwarf stars1
- galaxies6
- galaxy clusters10
- galaxy group1
- giant stars2
- globular star clusters1
- infrared astronomy1
- infrared counterpart1
- infrared photometry2
- infrared sources2
- late-type stars4
