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Subject
- novae[remove]115
- photometry67
- optical astronomy44
- infrared photometry39
- wide-band photometry35
- cataclysmic variable stars33
- spectroscopy26
- variable stars13
- galaxies8
- x-ray sources8
- sloan photometry6
- ccd photometry5
- line intensities5
- apparent magnitude4
- multiple stars4
- radial velocity4
- radio astronomy4
- ultraviolet photometry4
- infrared astronomy3
- surveys3
