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机译:A new reddening law for M4
Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria, BC V8W 3P6, Canada;
National Research Council Canada, 5071 West Saanich Road, Victoria, BC 2E7, Canada;
INAF-Osservatorio Astronomico di Capodimonte, Via Moiarello 16, 80131 Naples, Italy;
dust; extinction; globular clusters: individual (M4; NGC 6723); techniques: photometric;