# Presentation: 691802

## Data Processing and User Software

- Ken Ebisawa
- (Astro-E2 GOF)

- presentation
- and demonstration

## Astro-E2 Software Policy

- Astro-E2 data analysis will be easy
*New* instrument (XRS), but standard and established software scheme (ftools, xspec etc)
- Hardly new *data analysis technique* required
- Astro-E2 users do not have to worry about technicality
- GOF takes care of interface between instrument/satellite team and users
- Prompt release of the *best* software and calibartion
- Users can concentrate on *SCIENCE*
- Some specific analysis may *not* be supported (e.g., spatial-spectral analysis of clusters of galaxies)

## Astro-E2 Software Characteristics

- Astro-E2 is Japan-US mission
- There are three instruments (XRS, XIS, HXD)
- Several institutes in two countries involved
*Goals:*
- Same software used in US and Japan
- Same software is used by different instrument teams and Guest Observers
- We have established a software development scheme to achieve these goals

## Data Processing Outline

- Access to RPT is restricted
- All the calibration and analysis start from FFF
- FFF complies OGIP standard

## Data Processing: Stage 0(only at ISAS)

- ISAS receive telemetry from the satellite
- FITS wrapped “Raw Packet Telemetry (RPT)” is created from satellite database
- One RPT for one pointing observation
- Time assignment is made on RPT
- RPT is not distributed.  Access to RPT restricted
- Attitude is calculated from RPT
- Orbit is determined

## Data Processing: Stage 1(at ISAS; if necessary at GFSC)

- RPT is converted to a set of First FITS Files (FFF)
*mk1stfits* is run routinely at ISAS
- mk1stfits is available *only* at ISAS and GSFC
- In case of urgent needs, GSFC is able to run mk1stfits to create FFF (back-up purpose)
- From one RPT, ~50 FFFs are created
- Separate for instruments and observational modes
- Separate for scientific data and HK data
- FFF comply OGIP standard
- All the analysis and calibration should start from FFF
- This is the only data access route
- No other data access path exist

## Data Processing: Stage 2(ISAS and GSFC; if necessary by GOs)

- Calibration is applied to FFF
- Carried out both at ISAS and GSFC
- Using Astro-E2 ftools (e.g., all the tools distributed)
- Guest Observers may repeat calibration, if necessary
- Second FITS Files (SFF) created
- Event files may be split depending on minor modes (e.g., XIS window option)
- “Filter file” is created from HK, attitude and orbit
- “makefilter” ftool used
- Later used for data screening

## Data Processing: Stage 3(ISAS, GSFC, GOs)

- Data screening (using filter file)
- We shall learn proper data selection criteria after launch
- Earth elevation, orbital condition, particle monitor condition etc.
- “Screened event files” are created
- Make images, spectra, light curves
- Standard products will be in the archives
- Extract “trend products”
- Earth data for background monitor, calibraiton source peak spectra etc.
- Used for calibration and monitoring the satellite health condition

## Astro-E2 ftools: development

- US-Japan collaborative development
- “Critical” ftools for calibration are mostly written in Japan
- Same codes for on-line monitoring system at ISAS and ftools for general users
- XRS, XIS and HXD team adopts the standardized coding style (“ANL” system)
- ANL modules are converted to FITS
- GSFC takes care of packaging, testing, distribution, maintenance

## Astro-E2 ftools: distribution

- Astro-E2 ftools are distributed as a component of the “HEAdas” package
- HEAdas:
- A new component of HEASoft
- Simpler, leaner, more portable, stable, extensible than ftools
- Clear separation of the mission dependent part and independent part
- Swift ftools is in the HEAdas package

## Pipe-line processing

- Original script written for ASCA (in shell language) at GSFC
- Improved and rewritten in Perl for Astro-E1
- Adopted for Swift with some modification
- Identical script will be running at GSFC and ISAS
- Data distribution package for users made
- Same data will be also put in archives

## Ground data processing

- Function test data (full satellite) are taken at ISAS in 2004/12/15,16
- FFFs created successfully
- Testing further processing
- SFF (calibration), filter file, data products

## XRS specific development

- How to make XRS ARFs?
- When select particular XRS pixels
- Extended sources?
- Planning many ray-tracing simulations
- How to combine XRS RMFs
- XRS RMFs are different for different chips
- Need to combine different RMFs
- How to handle different resolution events
- High and Med-p combined?
- How to adjust normalization?