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Rewriting the textbooks MOST science is doing that.

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Presentation on theme: "Rewriting the textbooks MOST science is doing that."— Presentation transcript:

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5 Rewriting the textbooks MOST science is doing that

6 Photometric precision has been maintained or improved upon, due to: As good as – or better than – ever excellent pointing (better than ± 1 arcsec) optimised on-board image stacking continuing refinements to the Fabry and Direct Imaging data reduction experience Photometric performance

7 January – August 2010

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9 WASP-12 and NASA GO T Tauri field came within 10° of illuminated Earth and lost pointing lock Problems with acquisition of Z CMa as a switch target ‘anchor’ for HD False sun sensor readings part of the cause For last 6 days of ρ Pup (& HD 57682) campaign both stars eclipsed for part of each MOST orbit Pointing on Regulus interrupted by SEU (Single Event Upset) corruption of ACS (not a crash) Slightly reduced time on science targets Operations

10 “refquality” used to diagnose guide star problem with AD Leo, W Crv, (40 Ser), HR 5999, ε Oph A new statistic now gathered for the number of lit pixels per guide star Smaller values of the ADU counts on the lit pixels could lead to a poorer guide star centroid calculation Extra lit pixels would cause inaccurate guide star centroid value ACS now evaluates “centroid radius” as one possible cause of anomalous guide star jitter Modifications to ACS software Operations

11 6¾, going on 7 “Advanced old age. in 2003 MOST years” over 65 in microsat years

12 6¾, going on 7 “Over the hill?”. in CoRoT and Kepler years” 8 track iPod vs. ?

13 Spacebased photometry MOST has been joined by CoRoT and Kepler and will be joined soon by BRITE Constellation on this scientific frontier CoRoT smallsat BRITE nanosat MOST microsat 6 kg 54 kg630 kg brite-constellation/main5.html not to scale

14 Convection, Rotation and. planetary Transits. CoRoT

15 CoRoT CVZ

16 Continuous observations MOST CVZ

17 kepler.nasa.gov Kepler

18 Kepler CVZ

19 MOST CVZ Kepler 3½ years + ? 5 months CoRoT 5 months CoRoT 2 months

20 Publications 6 refereed scientific papers by MOST Team and collaborators published or in press since last Ops Review 61 refereed papers in total

21 6 refereed scientific papers by MOST Team and collaborators published or in press since last Ops Review 61 refereed papers in total 4 papers currently being refereed at least 3 manuscripts should be ready for submission within the next month Publications

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23 Flares, spots and rotation Spectroscopic binary II Pegasi

24 Flares, spots and rotation Eleven flares observed

25 Flares, spots and rotation Mean flare profile

26 Flares, spots and rotation Mean flare profile Differential rotation

27 Flares, spots and rotation Mean flare profile Differential rotation

28 Flares, spots and rotation Results of analysis of the almost-continuous, one-month-long MOST photometry of the active binary system II Pegasi Eleven flares were observed (one lasting about 24 hr and six moderately long ones, lasting typically 5 to 10 hr) The primary eclipse of the visible star by its companion (probably an M dwarf) was not detected, which sets an upper limit on the orbital inclination of the system i < 76° From our analysis of the dark-spot modulated light curve, and the absence of internal variability of spots during the MOST observations, we obtain an estimate of the differential rotation parameter k = ( −0.0020)

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30 6 refereed scientific papers by MOST Team and collaborators published or in press since last Ops Review 61 refereed papers in total 4 papers currently being refereed at least 3 manuscripts should be ready for submission within the next month 2010 CASCA meeting 5 talks and 1 poster on MOST science Publications

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33 MOST data use by others MOST Public Data Archive 2009 user statistics: 23,471 files downloaded (11.9 GB of data in total ) 182 distinct IPs

34 MOST data use by others MOST Public Data Archive 2009 user statistics: 23,471 files downloaded (11.9 GB of data in total ) 182 distinct IPs Canada 33 USA 23 Brazil 8 India 4 Poland 4 UK 4 Austria 3 Germany 3 Hungary 3 Russia 3 France 2 Italy 2 Japan 2 Mexico 2 Taiwan 2 Australia 1 Belgium 1 Bosnia 1 Bulgaria 1 China 1 Croatia 1 Czech Republic 1 Indonesia 1 Israel 1 Philippines 1 Romania 1 Slovenia 1 South Africa 1 Spain 1 Sweden 1 TOTAL 113

35 MOST data archiving

36 We have allocated 56 days of time to 4 of the 5 top-ranked proposals NASA GO Cycle 2

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40 40 Status of MOST James Wells

41 How Are We Doing? On June 30 th, MOST will enter its 8 th year of operations! You Are Here (11.9 AUs from the Sun)

42 Several Target Campaigns, Including the Conclusion of the First Round of NASA GO Targets 42 Next round of NASA GO observations starts this Fall

43 43 Additional Targets From HARPS Observed four exo- planet target stars over 14 ten-hour periods, centered on expected transit times On-going campaign - still more to be observed

44 MOST Ground Stations Repairs were done on IFA Ground Station, and checkouts done at UTIAS and UBC Currently, all 3 stations are running well, though now and then get degraded passes at UBC IFA UTIAS UBC 44

45 Much Calmer 6-Months, In Terms of Radiation Induced Crashes 45 4 software crashes likely due to radiation between 12/1/2009 and 6/1/2010 (6 months) 13 crashes during the previous 6-month period SAA

46 Long Term Power Situation for MOST 46 Power generation drops below consumption at the beginning of 2015 (outside eclipse times)

47 Monitoring Eclipse Season in 2011 / Can trade-off between two variables to keep the battery charged: –Sun angle to main panel (ie. target selection) –Total transmission time Will depend on duration of the eclipse for the given day Need a new monitoring system: –Calculate power generation from Snapshot panel voltages and currents –Alarm if it below what is required for the eclipse duration of the day –Either need to reduce transmission time or switch to another target (can plan ahead to try to avoid unnecessary target switches)

48 Looking Ahead to Power Situation by 2013 Will need to change power setup on MOST “Engineering” anchor targets for part of an orbit –Main panel pointed more directly at sun Peak Power Trackers –Have yet to be turned on Change to CCD clocking? –Might save some power 48

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