1. MOST Guide Star Photometry
Overview,
Statistical
Analysis by
Rainer Kuschnig &
the MOST Team
COROT WEEK June – Nice

2. MOST Photometry Sources
Science CCD
Star Tracker CCD
open field
direct imaging
micro Lens Array
Fabry target
Direct imaging
targets
Guide stars
COROT WEEK June – Nice

3. MOST Guide Star Photometry
up to 20 guide stars per field
the magnitude range
exposure time is 1.5 sec
no images are recovered
brightest guide stars -> 30ppm
COROT WEEK June – Nice

4. MOST Guide Star Photometry COROT WEEK 10 - 5-9 June 2006 – Nice
1.5 sec exposure
calculate background
apply threshold
Sigexp = S (Ipix > backgr+threshold)
Sigtot = S N*Sigexp
-> stored in the science data stream
N = integer (target sampling time / guide Star exposure Time)
COROT WEEK June – Nice

5. MOST Guide Stars – Performance
COROT WEEK June – Nice

6. MOST Guide Stars – NOISE
COROT WEEK June – Nice

7. MOST Guide Stars - Stats
Total number of 263 – Feb 2006
time base:
7 to 47 days
COROT WEEK June – Nice

8. MOST Guide Stars – Locations
typically field stars
clusters: NGC2264,NGC2244
dense fields: WR123,WR103
COROT WEEK June – Nice

9. COROT WEEK 10 - 5-9 June 2006 – Nice
MOST Guide Stars – NGC2264
COROT WEEK June – Nice

10. COROT WEEK 10 - 5-9 June 2006 – Nice

11. COROT WEEK 10 - 5-9 June 2006 – Nice

12. COROT WEEK 10 - 5-9 June 2006 – Nice
MOST Guide Stars – Variables
3 eclipsing binaries
3 gam Dor
2 K puls
3 rotational variables
7 SPB(e,sg,classical)
12 LPVs
10 del Scuti
~15 to be finally classified
…….. to be continued ……
COROT WEEK June – Nice