Summary of the SIM EPICS/Marcy Database
The Radial Velocity Vetting aspects of the The SIM EPICS/Marcy target
list are managed using a database stored in IDL Structures (LINK).
These structures are saved as IDL save files, and can be restored
in the usual way, eg: IDL> restore,'sim_st.dat'
The two important structures are:
sim_st.dat contains all Tier 1 SIM reference stars,
and associated data. These include star specific data
(RA, Dec, V, B-V etc.) and an array of data for each of
(up to 40) reference stars associated with that target
star. The REF star data are housed in tags beginning
with "REF_", eg.
REF_NAME STRING Array[40]
A final tag described the overall status of the reference
stars.
REFOBSERVED STRING 'Picked'
simref_st.dat contains data relevant to the reference stars.
For the most part this structure is in a format designed to mesh with
the Marcy et al planet search team's doppler analysis package.
This explains some of the unusual tags. There is also a tag
identifying which target star this reference star is associated with.
Two other structures were used in selecting REF stars for
each Target.
- tyc2m.dat a full cross correlation of Tycho/2MASS (2.3 M)
- t2g.dat Subset of above contaning only suspected Giant stars (500k) Ciardi
Both these files were created by Dave Ciardi in the context of
the SIM Grid. We found them useful for selecting ref. stars.
If the ref star selection process should be reconsidered, these
files could be used. Or one could repeat the
work Ciardi did
if one wanted to try to find giant stars using different criteria.
Download
sim_st.dat
simref_st.dat
tyc2m.dat
t2g.dat
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