Datatype: gK
The datatype gK refers to lists of red giants candidates in the field of open
clusters. Such lists originated from the preparation of the radial velocity
observation survey made with the Coravel. They have been extended to most clusters.
The aim of these files is to summarize the red giant membership from proper motion (M), radial velocity (V) and photometry (P) and to list the photometric system in which
these stars have been observed.
A simple classification (A B C D has been designed to record if the red
giant is on the asymptotic giant branch (A), on the first ascending branch
(B), in the clump (C), or lies on the left of the normal sequence
in the position of a binary (D). Non-members (Filed stars) are designated by
(F). A second (B) indicates that the star is a known spectroscopic
binary.
Record structure
| No | : | Star number |
|---|
| Prob | : | Membership probability |
|---|
| MVP | : | Membership estimate (MVP) |
|---|
| Src | : | Radial velocity source |
|---|
| PHO | : | Photometry code |
|---|
| Class | : | Classification |
|---|
Symbol explanation
- Membership estimate
- + : probably member
- — : probably non-member
- ? : not decided
- Radial velocity source
- C : Coravel radial velocity scanner
- G : Griffin's scanner
- L : CfA spectrographs (Latham)
- T : Tokovinin scanner
- Photometry code
- 1 : UBV pe or CCD
- 2 : UBV pg
- 3 : Geneva
- 4 : DDO
- 5 : Washington
- 6 : RI (any)
- 7 : Eggen's uvby
- 8 : UBViyz
- 8 : Wing's photometry
- Classification
- A : Asymptotic branch star
- B : Ascending branch star
- C : Clump star
- D : Double (?) star
- F : Field star
Database access
List of clusters
Jean-Claude.Mermilliod@obs.unige.ch
Last Update: 26 February 1998