Hubble Legacy Archive

These pages have been migrated from ST-ECF to STScI's HLA site due to the closing of that facility. The NICMOS and ACS Grism work was completed at ST-ECF as part of the ECF's contribution to the HLA.

ST-ECF ACS/WFC Grism Data Release (June 30th 2010)

Instructions for data retrieval via the VO

What is the HLA?

The Space Telescope Science Institute (STScI), the Canadian Astronomy Data Centre (CADC) and the ST-ECF are working together to optimize the future scientific return from the Hubble archives by producing enhanced data products and efficient data discovery and access services - collectively known as the Hubble Legacy Archive (HLA) - with the goal of capturing expertise in Hubble and assuring the maximum utility of Hubble data for long-term use by the community. The HLA provides footprints for ACS, WFPC2, STIS, NICMOS, FOS, and GHRS, enhanced image products for ACS and WFPC2, and grism spectra for NICMOS and ACS/WFC.

ACS/WFC grism data release

The ST-ECF is pleased to announce a release of 47919 datasets, extracted from ACS/WFC grism spectra as part of the HLA project.These spectra were extracted from 153 archival fields (or "associations") distributed across the two Galactic caps (see map).

Examples of ACS grism spectra included in the release. Top left: an M-star; top right:a low redshift star burst galaxy; bottom left: a broad-absorption line QSO identified as a Chandra X-ray source; bottom right: an early-type galaxy.

Further information is available on the following pages:

HLA FAQ Frequently asked questions
HLA ACS/WFC G800L data - data quality information and examples
Refereed paper for the NICMOS HLA DR1 release: Freudling et al. 2008, A&A 490, 1165
HLA NICMOS G141 data - data quality information and examples
Summary of the various HLA data access methods
Other high-level data products at ST-ECF

HLA Publication Acknowledgment

Users of HLA data sets are requested to include the following acknowledgment in any resulting publications:
"Based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA)."