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Subject
- ccd photometry[remove]90
- infrared photometry[remove]90
- open star clusters[remove]90
- photometry90
- optical astronomy86
- wide-band photometry80
- kron-cousins photometry7
- pre-main sequence stars5
- h alpha photometry4
- proper motions4
- astronomical object identification2
- infrared astronomy2
- late-type stars2
- variable stars2
- x-ray sources2
- emission line stars1
- galaxies1
- infrared sources1
- ob stars1
- peculiar variable stars1