Empirical calibrations of the stellar age-rotation-activity relation (ARAR) rely on observations of the co-eval populations of stars in open clusters. The authors...

data.gov00

M 83 Chandra X-Ray Point Source Catalog

The authors of this table have obtained a series of deep X-ray images of the nearby (4.61 Mpc) galaxy M 83 using Chandra, with a total exposure of 729 ks. Combining the new data...

NASA Open Data Portal00

M 101 Chandra X-Ray Point Source Catalog

A deep (98.2ks) Chandra Cycle 1 observation has revealed a wealth of discrete X-ray sources as well as diffuse emission in the nearby face-on spiral galaxy M 101. From this rich...

NASA Open Data Portal00

M 37 Chandra X-Ray Point Source Catalog