Transcript MOST data archiving

Rewriting the textbooks
MOST science
is doing that
Photometric performance
As good as – or better than – ever
Photometric precision has been maintained or
improved upon, due to:
 excellent pointing (better than ± 1 arcsec)
 optimised on-board image stacking
 continuing refinements to the Fabry and Direct
Imaging data reduction experience
January – August 2010
January – August 2010
Fourth NASA GO Target Campaign (T Tauri (2))
Dec 09
Jan 10
BD-082833 BD-082833
BD-082833
Feb 10
HD96700
HD96700
HD96700
Mar 10
HD115617
HD115617
HD115617HD115617 HD125595
Apr 10
HD125595
HD125595
HD125595
May 10
0
5
10
15
20
day of month
25
30
35
Rigel
T Tauri (2)**/WASP-12**(every 2.2 days for 10 hours)
HD80606/Z CMa
rho Pup/HD57682
rho Pup/Regulus
Regulus
AD Leo
W Crv
W Crv/WASP-14
WASP-14
HR 5999/40 Ser(needed as an anchor target)
eps Ophi**
Operations
Slightly reduced time on science targets
 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 80606
 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)
Operations
Modifications to ACS software
 “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
6¾, going on 7
over 65 in
“Advanced old age.
microsat
years
in 2003 MOST years”
6¾, going on 7
“Over the hill?”.
in CoRoT and Kepler years”
8 track
vs.
iPod
?
Spacebased photometry
MOST has been joined by CoRoT and Kepler
and will be joined soon by BRITE Constellation
on this scientific frontier
MOST
CoRoT
microsat
smallsat
BRITE
54 kg
630 kg
nanosat
6 kg
http://www.univie.ac.at/
brite-constellation/main5.html
not to scale
CoRoT
Convection,
Rotation and.
planetary Transits.
http://smsc.cnes.fr/COROT
CoRoT CVZ
MOST CVZ
Continuous
observations
Kepler
kepler.nasa.gov
Kepler CVZ
2 months
MOST CVZ
Kepler
3½ years + ?
CoRoT
CoRoT
5 months
5 months
Publications
 6 refereed scientific papers
by MOST Team and collaborators
published or in press since last Ops Review
 61 refereed papers in total
Publications
 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
Flares, spots and rotation
Spectroscopic binary II Pegasi
Flares, spots and rotation
Eleven flares observed
Flares, spots and rotation
Mean flare profile
Flares, spots and rotation
Mean flare profile
Differential rotation
Flares, spots and rotation
Mean flare profile
Differential rotation
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 = 0.0245 (+ 0.0155 −0.0020)
Publications
 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
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
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
USA
Brazil
India
Poland
UK
Austria
Germany
33
23
8
4
4
4
3
3
Hungary
Russia
France
Italy
Japan
Mexico
Taiwan
Australia
3
3
2
2
2
2
2
1
Belgium
Bosnia
Bulgaria
China
Croatia
Czech Republic
Indonesia
Israel
1
1
1
1
1
1
1
1
Philippines
Romania
Slovenia
South Africa
Spain
Sweden
1
1
1
1
1
1
TOTAL 113
MOST data archiving
NASA GO Cycle 2
 We have allocated 56 days of time to 4 of the
5 top-ranked proposals
NASA GO Cycle 2
NASA GO Cycle 2
Status of MOST
James Wells
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How Are We Doing?
• On June 30th, MOST will enter its 8th year of
operations!
You Are Here
(11.9 AUs from
the Sun)
Several Target Campaigns, Including the
Conclusion of the First Round of NASA GO Targets
Rigel
T Tauri (2)**/WASP-12**(every 2.2 days for 10 hours)
HD80606/Z CMa
rho Pup/HD57682
rho Pup/Regulus
Regulus
AD Leo
W Crv
W Crv/WASP-14
WASP-14
HR 5999/40 Ser(needed as an anchor target)
eps Ophi**
Fourth NASA GO Target Campaign (T Tauri (2))
Dec 09
Jan 10
Feb 10
Mar 10
Apr 10
May 10
0
5
10
20
15
day of month
25
30
35
• Next round of NASA GO
observations starts this
Fall
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Additional Targets From HARPS
• Observed four exoplanet target stars over
14 ten-hour periods,
centered on expected
transit times
• On-going campaign still more to be
observed
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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
UTIAS
IFA
UBC
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Much Calmer 6-Months, In Terms of Radiation
Induced Crashes
SAA
•
•
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
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Long Term Power Situation for MOST
•
Power generation drops below consumption at the beginning of 2015
(outside eclipse times)
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Monitoring Eclipse Season in 2011 / 2012
• 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)
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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
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