Stromgren photometry in M67

Precision CCD uvbyCaH{beta} photometry is presented of the old cluster, M67, covering one square degree with typical internal precision at the 0.005-0.020mag level to V~17. The...

本文针对老年星团M67，给出了高精度电荷耦合器件（Charge-Coupled Device，CCD）uvbyCaHβ测光观测数据，观测天区覆盖1平方度，典型内部精度可达0.005~0.020星等，测光极限可达V≈17。