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Welcome to the HST Spectroscopic Legacy Archive (HSLA).
With no future space ultraviolet instruments currently planned, the data from the UV spectrographs aboard the Hubble Space Telescope have a legacy value beyond their initial science goals. This release of the Hubble Spectroscopic Legacy Archive (HSLA) provides to the community new combined spectra for COS far-ultraviolet (FUV) data publicly available as of February 2016. COS/NUV data, similar to the data available in the Mikulski Archive is also available in the HSLA. These data are packaged into "smart archives" according to target type and scientific themes to facilitate the construction of archival samples for common science uses. A new "quick look" capability makes the data easy for users to access and download. Coadded COS/NUV data and STIS UV spectra will be made available in future releases.
This early 2017 release includes more than 200 new targets and recent public data on targets included in last year's releases. All the data have been re-calibrated and re-coadded. For COS/FUV, the most important change is the use of the new COS FUV dispersion solutions, for Lifetime Position 1 and Lifetime Position 2. Data obtained at Lifetime Position 3 still use the old dispersion solutions.
For more information on the new wavelength solutions, see the articles linked here:
This release also contains the COS/NUV data for all targets that have FUV data as well as for targets that only have NUV data. These data have been calibrated with the most up-to-date dispersion solutions:
IMPORTANT NOTE: The content and format of the data are designed to enable users to assess the quantity and quality of data that already exists in the archive to support their science goals. In particular, this release of the Legacy database was timed to inform proposers in preparation for the Cycle 25 call for proposals.
Access to exposures and coadds, all the diagnostic plots, and cross-matched information from Simbad or NED can be found here: Pre-Sorted Target Tables - Targets sorted by target type.
Do you want the entire thing? It's only 25 GB.
The HST Spectral Legacy makes use of Spectator, written by Molly Peeples, to create its plots of demographics and spectra. Spectator is open-source python, and is available on GitHub.
Questions and Comments
We invite questions and comments about the database to firstname.lastname@example.org.