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Overview of MOST Guide Star Photometry: Statistical Analysis and Performance Insights

This document presents a comprehensive overview of the Guide Star Photometry from the MOST satellite, detailing the statistical analysis conducted by Rainer Kuschnig and the MOST team during COROT Week 10 (June 5-9, 2006) in Nice. The study covers up to 20 guide stars per field within a magnitude range of 6.5-11 and outlines parameters such as exposure time, noise statistics, and target locations. Performance metrics highlight the ability to process various types of stars, including eclipsing binaries and other variable stars, captured through direct imaging techniques.

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Overview of MOST Guide Star Photometry: Statistical Analysis and Performance Insights

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  1. MOST Guide Star Photometry Overview, Statistical Analysis by Rainer Kuschnig & the MOST Team COROT WEEK 10 - 5-9 June 2006 – Nice

  2. MOST Photometry Sources Science CCD open field direct imaging Fabry target Guide stars Direct imaging targets micro Lens Array Star Tracker CCD COROT WEEK 10 - 5-9 June 2006 – Nice

  3. MOST Guide Star Photometry • up to 20 guide stars per field • the magnitude range 6.5-11 • exposure time is 1.5 sec • no images are recovered • brightest guide stars -> 30ppm COROT WEEK 10 - 5-9 June 2006 – Nice

  4. MOST Guide Star Photometry 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 10 - 5-9 June 2006 – Nice

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

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

  7. MOST Guide Stars - Stats Total number of 263 – Feb 2006 time base: 7 to 47 days COROT WEEK 10 - 5-9 June 2006 – Nice

  8. MOST Guide Stars – Locations • typically field stars • clusters: NGC2264,NGC2244 • dense fields: WR123,WR103 COROT WEEK 10 - 5-9 June 2006 – Nice

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

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

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

  12. 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 10 - 5-9 June 2006 – Nice

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