Datatype: hk CCD
This datatype (hkccd) collects the CCD photometric observations of
stars in open clusters made with the combination of Strögrem and
the Ca filters measuring the CaII HK line forming the Caby system.
The hk parameter is defined by : hk = (Ca - b) (b - y) by
Twarog et al. 1991.
Record structure
| No | : | Star number |
|---|
| Ref | : | Reference |
|---|
| V | : | V magnitude |
|---|
| b-y | : | b-y colour index |
|---|
| hk | : | hk parameter |
|---|
Database access
List of clusters
Query the references
Jean-Claude.Mermilliod@obs.unige.ch
Last Update: 2005 February 4