GLAST Large Area Telescope - OperationsDOE Review, 15 June GLAST Large Area Telescope Operations Review Rob Cameron Instrument Science Operations Center Manager Stanford Linear Accelerator Center Gamma-ray Large Area Space Telescope

GLAST Large Area Telescope - OperationsDOE Review, 15 June Outline  LAT Integration and Test –Schedule –Activities  GLAST Operations at SLAC –GLAST Ground System –LAT Instrument Science Operations Center –Online operations –Offline operations  Looking ahead

GLAST Large Area Telescope - OperationsDOE Review, 15 June Master Schedule  LAT complete and testedJanuary 9, 2006 –To NRL for environmental testing  Delivery to Observatory Integration June 1, 2006 –Mate with spacecraft and GBM and test  Launch August 31, 2007 –Kennedy Space Flight Center Spitzer Telescope Launch on a Delta II Heavy

GLAST Large Area Telescope - OperationsDOE Review, 15 June Integration and Test - Organization Integration Facilities Configuration and Test (IFCT) Mechanical Ground Support Equipment (MGSE) Particle Test Integration, Test, and Calibration Electrical Ground Support Equipment (EGSE) / Online Software Science Verification Analysis and Calibration (SVAC) Management Lead: Elliott Bloom

GLAST Large Area Telescope - OperationsDOE Review, 15 June LAT Integration and Test Schedule

GLAST Large Area Telescope - OperationsDOE Review, 15 June LAT Integration and Test at SLAC

GLAST Large Area Telescope - OperationsDOE Review, 15 June LAT Anti-Coincidence Detector

GLAST Large Area Telescope - OperationsDOE Review, 15 June Overview of LAT Data Taking Configurations Cosmic rays and a low energy photon beam are used to characterize the instrument performance at different phases of LAT integration By the end of the LAT integration there will be a couple TBytes of data to be analyzed. A LAT wide collaboration effort driven by SLAC is being organized to understand these data

GLAST Large Area Telescope - OperationsDOE Review, 15 June Cosmic Rays: Data and MC Simulations From Leon Rochester/Tracy Usher/Bill Atwood/Johann Cohen-Tanugi Good agreement between true and reconstructed distributions for 100 MeV muons in MC Simulations From Zach Fewtrell and Dave Smith

GLAST Large Area Telescope - OperationsDOE Review, 15 June First Light ! - Photon candidate From Anders Borgland based on Bill Atwood selection

GLAST Large Area Telescope - OperationsDOE Review, 15 June GLAST MISSION ELEMENTS GN HEASARC GSFC - - DELTA 7920H White Sands TDRSS SN S & Ku LAT Instrument Science Operations Center GBM Instrument Operations Center GRB Coordinates Network Telemetry 1 kbps - S Alerts Data, Command Loads Schedules Archive Mission Operations Center (MOC) GLAST Science Support Center  sec GLAST Spacecraft Large Area Telescope & GBM GPS GLAST MISSION OPERATIONS ELEMENTS

GLAST Large Area Telescope - OperationsDOE Review, 15 June LAT ISOC Objectives LAT ISOC Objectives  The LAT ISOC is organized to: –Safely operate the instrument –Reconstruct LAT events and produce selected science data  Main Functions: –Command planning and construction –Instrument health and safety monitoring –Maintain and modify FSW and the LAT Testbed –LAT performance verification and optimization –Process, archive and deliver LAT data –Maintain and optimize the software that produces science data products

GLAST Large Area Telescope - OperationsDOE Review, 15 June The ISOC in the LAT Collaboration  ISOC has close connections to LAT Science Groups –e.g. Working with Calibration and Analysis Methods Group to incorporate improvements to event reconstruction into ISOC processing and products  ISOC has broad involvement in the LAT collaboration –e.g. instrument performance analysis and tool development are coordinated by the ISOC across the collaboration See Elliott Bloom’s talk

GLAST Large Area Telescope - OperationsDOE Review, 15 June Online Operations  Mission Support –Build command loads –Monitoring and trending –Anomaly resolution  Data Management –Interfaces –Database Ingest –Product delivery  Configuration control –Config tracking –Config updates  Flight software –Maintenance –Updates Data resources are shared between Online and Offline –Databases –Interface tools

GLAST Large Area Telescope - OperationsDOE Review, 15 June LAT Data Flow Lab Online operations will be supported by the LAT Data Flow Lab –Command load verification –Instrument configuration validation –Flight software development and test platform DAQ TestbedSimulator

GLAST Large Area Telescope - OperationsDOE Review, 15 June Offline Operations  Lead: Richard Dubois  Key activities –Science data processing –Event reconstruction –Quick look science analysis –Serving data to the LAT collaboration  Uses SLAC SCS computer farm –75 CPUs –40TB disk space per year  Flexible implementation –Pipelined data processing Data Pipeline Sim Raw Data Level 0 Recon Level 1Science Tools Level 2 Recon: interpret LAT readout and estimate directions and energies; flag background Sim: full modeling of e/  /p interactions and readout in the LAT

GLAST Large Area Telescope - OperationsDOE Review, 15 June Instrument Simulation and Reconstruction CALORIMETER Detail Instrument data 3 GeV gamma interaction 3 GeV gamma recon Event reconstruction validated by beam tests Ref 1: Ref 2:

GLAST Large Area Telescope - OperationsDOE Review, 15 June Event Display and Inspection: FRED Multiple views 3D controls Graphics tree Graphics metadata: HepRep

GLAST Large Area Telescope - OperationsDOE Review, 15 June Science Verification Analysis and Calibration  Coordinated by Eduardo do Couto e Silva –The Science Verification Process prior to instrument delivery –A LAT collaboration effort, coordinated through a series of instrument analysis workshops –familiarizes LAT collaborators with the LAT instrument and LAT data taking and analysis –Prepares transition from pre-launch to on-orbit operations and data analysis  Activities –Process, archive and verify the integrity of data –in conjunction with offline processing –Produce reports to assess data quality and verify instrument configuration –Generate calibrated data analysis files and update, improve and track changes in the calibration constants –to be used in event reconstruction –Characterize the low level performance of the LAT at several stages of instrument integration –using cosmic rays and low energy photons –Refine MC simulations –using cosmic rays and low energy photons

GLAST Large Area Telescope - OperationsDOE Review, 15 June SVAC: Detector Calibrations TOT before calibration TOT after calibration From Hiro Tajima

GLAST Large Area Telescope - OperationsDOE Review, 15 June Quick-look Science Analysis 3EG catalog (Hartman et al. 1999)  Monitored sources –Release a preliminary source list that includes sources detected with very high confidence (e.g. >20σ) –Selected sources to be monitored regularly in phase 1. Source list (~20 sources) defined before launch, with community input –Quick look data include source position, average source flux, the peak source flux and estimated spectral index  Bursts and transient sources –Refine positions, fluxes, spectra for detected transients –Alerts can be generated for bursts and transient sources detected in Level 2 processing

GLAST Large Area Telescope - OperationsDOE Review, 15 June Science Tools User Interface aspects of the standard analysis environment, such as Image/plot display (UI2), Command line interface & scripting (UI4), and GUI & Web access (UI5) are not shown explicitly. 1 This tool also performs periodicity tests and the results can be used to refine ephemerides 2 These tools can also take as input binned data from other instruments, e.g., GBM; the corresponding DRMs must also be available. Pulsar ephem. (D4) Level 1 (D1) LAT Point source catalog (D5) Interstellar em. model (U5) Pointing/livetime history (D2) Astron. catalogs (D6) Level 0.5 IRFs (D3) Alternative source for testing high- level analysis Alternative for making additional cuts on already- retrieved event data Pt.ing/livetime simulator (O1) Observation simulator (O2) Pt.ing/livetime extractor (U3) Data sub- selection (U2) Data extract (U1) Exposure calc. (U4) Likelihood (A1) Map gen (U6) Src. ID (A2) Event display (UI1) Pulsar profiles (A3) 1 Catalog Access (U9) Pt.ing/livetime extractor (U3) Pulsar phase assign (U12) Pulsar period search (A4) GRB spectral-temporal modeling (A10) Source model def. tool (U7) Arrival time correction (U10) GRB temporal analysis (A7) 2 GRB LAT DRM gen. (U14) GRB spectral analysis (A8) 2 GRB event binning (A5) GRB unbinned spectral analysis (A9) GRB visual- ization (U13) IRF visual- ization (U8) Ephemeris extract (U11) GRB rebinning (A6) 2 Standard Analysis Environment Coordinated by Seth Digel

GLAST Large Area Telescope - OperationsDOE Review, 15 June Onward to Launch!  Instrument Integration and Test is proceeding well –Six flight towers integrated into the Grid –Seven Tracker modules at SLAC –Ten Calorimeters are at SLAC All 16 plus 2 spares are complete –Anti-Coincidence Detector complete and ready for environmental test  Ground system implementation is in progress –ISOC participating in GLAST ground system tests 6 Ground readiness tests, End-to-End tests, –Preparing support for late stage LAT testing LAT environmental tests, 2006 Observatory integration, –Offline operations validated by Data Challenges DC2 scheduled for January 2006 –Fourth instrument analysis workshop in July 2005