Transcript SO-AllHands-20060614.ppt

GLAST
Gamma-ray Large
Area Space
Telescope
ISOC All Hands June 14 2006
GLAST Large Area Telescope:
Science Operations
The 10 Minute Tour
Eduardo do Couto e Silva and Seth Digel
Stanford Linear Accelerator Center
[email protected]
[email protected]
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GLAST
ISOC All Hands June 14 2006
An Overview…
• Routine monitoring of instrument performance, celestial sources and
particle background on orbit
– Event classification, monitoring and optimization of instrument
performance; monitoring, detection
• characterization of transient sources (including GRBs)
– with support from LAT Science groups
• generation of instrument response functions for high-level analyses
• Provide science data products to GSSC, alerts to GCN and event data
to LAT Collaboration
• Coordinate shift activities for on-orbit monitoring (instrument and
science)
• Coordinate investigation of anomalies, calibrations and propose
changes in configuration to optimize scientific return
– in coordination with the LAT Science Groups
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There is more…
• Data Analysis for Ground tests (IA Workshops) and moving toward
data Analysis for on-orbit operations
• Data analysis to support monitoring of trigger and data flow
conditions
– work together with FSW folks when performing data analysis on
trigger, on-board filters, etc
– work with CHS when correlating science data and housekeeping
data
• Monitor Instrument data processing , configure and operate pipeline
• Provide input to SAS to develop tools, database, web development
and software for science operations
– test and provide feedback
• Integrate with the LAT Collaboration
– not only SLAC people, rely on support from the LAT collaboration
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The usual suspects…at SLAC
What is wrong with this
people? Either eating or
sleeping
Tracy
Warren
Leon
Anders
+ 4 postdocs
Jim
Mutsumi
ZZZ
Z….
Martin
Eating can
be tiresome
Eric
Hiro
ZZZ
Z….
Eduardo
Seth
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We expect LAT collaboration support…
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•
•
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GLAST
ISOC All Hands June 14 2006
Instrument Analysis Workshops
Exercise reconstruction algorithms and data analysis
tools
– Use simulated and real data
Uncover and quantify instrumental effects
– Could potentially affect science data
Create a core and trained group
–
to participate in the analysis of the beam
test data
– to lay foundations of the LAT Science
Operations Group of the ISOC
RMS by Tower
6 Workshops at SLAC
from Jun/2004 to Feb/2006
(Now under new management)
TKR Calibrations (gains)
are stable!
April 2005
Jun 2005
Oct 2005
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ISOC All Hands June 14 2006
Data Analysis: GLAST/LAT Beam Test @ CERN
•
Science performance verification strategy
– LAT performance phase space is huge
– MC simulation used to verify requirements by analysis
– Beam test used to tune and check the simulation and aspects of
the reconstruction.
» Essential component of our overall strategy
» Previous beam tests 1997, 1999/2000
•
Objectives
– Characterize performance at high energies
– corrections for leakage, inter-tower gaps, and backsplash (SSD in
TKR and ACD).
– trigger performance (e.g., CAL-HI), comes “free” with same data
– Verify MC simulations of detector’s response
• electromagnetic showers (gamma, electron)
• Point Spread Function and Energy reconstruction methods.
• Compare distributions of quantities related to those used in
background rejection with hadron beams.
Primary purpose is to constrain systematic
uncertainties in science analysis
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Service Challenge in 2007
We will have Data Challenge 3 in 2007… but it will be a service challenge
Data Analysis with simulated sky data to test ISOC tools and software
•
Data Challenge Series
– Test the data analysis system
• HEP software and Astro FTOOLS
– “Blind “ Analysis
• Details of physics and detector performance
not revealed to the collaboration until
closeout
– Engage the collaboration
• to start thinking science
DC2: Two months with celestial sources (also
variable) and background
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Timeline: Milestones
ISOC
“DC3”
Beamtest
2006
Offline data analysis
study of beam
configurations
2007
Launch!
2008
Create Science
Data Products
in operations
framework
First Prototype
Monitoring
for on-orbit
operations
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I hope this will be over by noon…
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