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Subject
- infrared photometry[remove]455
- open star clusters[remove]455
- photometry455
- optical astronomy294
- wide-band photometry235
- ccd photometry84
- pre-main sequence stars70
- proper motions50
- x-ray sources40
- radial velocity30
- variable stars28
- h alpha photometry26
- young stellar objects24
- line intensities23
- stellar spectral types22
- stellar masses18
- astronomical object identification16
- spectroscopy16
- effective temperature15
- h ii regions14