# Presentation: 151458

## The HEASARC

- Coordinate data, software, and media standards with other astrophysics sites.

*Established December 1990*

- _The HEASARC Charter:_

- Maintain and disseminate data from previous and concurrent high-energy astrophysics missions

- Provide software and data analysis support for these data sets

- Maintain and provide the necessary scientific and technical expertise for the processing and interpretation of the data holding

- Develop and maintain multi-mission analysis and support tools

- Provide catalogs of observations and ancillary information for the data holdings

## Active Mission Support

## The Physical Archive

- _Active Missions_
- RXTE (1995- )
- BeppoSAX (1997- )
- Chandra (1999- ) [data at CXC]
- XMM-Newton (1999- )
- HETE-II (2000- )

- _Past Missions_
- Ariel 5	EXOSAT
- ASCA 	Ginga
- BBXRT	HEAO 1
- CGRO 	HEAO 3
- Copernicus	OSO 8
- COS B 	ROSAT
- DXS 	SAS 2
- Einstein 	SAS 3
- EUVE 	Vela 5B

- •	Data from 25 missions currently in the archive
- •	About 280 astronomical catalogs & mission tables
- •	The archive volume was
- 2500 Gigabytes as of the end
- of 2001

- _Upcoming Missions_
- Integral (2002 Launch)
- Swift (2003 Launch)
- GLAST (2006 Launch)

## Data Restoration

## The HEASARC Web

- Assist astrophysicists in all stages
- of their archival research:

- Information and latest news about HEASARC Catalogs

- • Mission information

- • Search catalogs & retrieve data

- • Download analysis software

- • Access documentation

- • Astronomical Web site links

- • Public outreach & education

## Education & Public Outreach

*A service of the High Energy Astrophysics Learning Center*
- http://imagine.gsfc.nasa.gov/

- Multi-level discussion of astronomy
- Lesson plans using actual satellite data
- CD-ROM’s, posters, support teacher conferences
- Created by HEASARC scientists and programmers collaborating with teachers
- NCTM and NSTS standards listed
- Ask A High Energy Astronomer service

## HEASARC CD-ROM’s

- The HEASARC publishes CD-ROM’s containing
- selections of important data products (images,
- spectra, and light curves).
- Thirteen CDs have been published for a variety
- of high-energy astrophysics missions (CGRO,
- ROSAT, EXOSAT, and Einstein.
- CD-ROM’s contain URL links directly back to
- the data archives at the HEASARC.
- CD-ROM’s are distributed by the HEASARC at
- AAS and other astronomical meetings, and are
- also available free of charge on request.

## Software: Ftools & Xanadu

- FTOOLS is a general software package which can manipulate any type of FITS files, and can do selection, analysis, and other scientifically useful tasks on FITS files from high-energy astrophysics missions. Currently supported missions include ASCA, ASTRO-E, CGRO, Einstein, EXOSAT,  OSO-8, ROSAT, RXTE, and Vela 5B.
- XANADU is a software package comprising high-level programs for spectral (XSPEC), timing (XRONOS), and imaging (XIMAGE) analysis of X-ray and gamma-ray astronomy data files.

- In early 2000, FTOOLS and XANADU will work in an integrated common environment and be distributed (either together or separately, according to the user’s requirement) on a common release schedule.

## Software: Xanadu

- Multi-mission analysis software

- Spectral analysis: XSPEC

- Timing analysis: XRONOS

- •	Image analysis: XIMAGE

## Software: Ftools

- All code written in ANSI standard C or FORTRAN. Machine-independent and portable.
- All data input/output is in the form of FITS files via the CFITSIO subroutine interface, or occasionally, ASCII files.
- All user input to the task is done via a parameter file.

## Data Format Standards

- The HEASARC develops, coordinates and promotes standardized FITS formats for use within the High-Energy Astrophysics community.
- These standards allow multi-mission analysis packages and encourage recycling of software at considerable cost savings.
- The HEASARC publishes these standards on the Web and in its journal, *Legacy*. It also collaborates with new missions to ensure that their data products conform to these standards.

## The HEASARC Customers

- Investigators selected to use the ASCA, ASTRO-E, BeppoSAX, CGRO, ROSAT, and RXTE observatories which include scientists
- 	- at US universities
- 	- at NASA’s GSFC and other government labs
- 	- from around the world
- Archival researchers
- The general public, who are interested in what NASA is doing
- Teachers, parents, and school children for education and outreach

- The HEASARC has 4 groups of users:

## Usage & Data Statistics

- Gigabytes (GB) transferred  by ftp per year:

-      _1998_               _1999__	_            _2000_	          _2001_
-    842 GB         1391 GB       1846 GB           2251 GB

-     Gigabytes (GB) transferred by the www (http) per year:
- _1998_             _1999__	_           _2000_              _2001_
- 424 GB      603 GB         1083 GB         1428 GB

- Gigabytes retrieved per quarter