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The Hubble Advanced Spectral Product (HASP) Program
Authors:
John Debes,
Ravi Sankrit,
Travis Fischer,
Elaine Frazer,
Alec Hirschauer,
Kate Rowlands,
Matthew Burger,
Robert Swaters,
Robert Jedrzejewski,
Sierra Gomez,
Leonardo Dos Santos,
Svea Hernandez,
Lauren Miller,
Anna Payne,
Marc Rafelski,
Thomas Wevers,
Sara Anderson,
Tom Bair,
Kathryn Bello,
Joleen Carlberg,
Brian Charlow,
Andrew Cortese,
Nadia Dencheva,
Tracy Ellis,
Ben Falk
, et al. (17 additional authors not shown)
Abstract:
The Hubble Advanced Spectral Products (HASP) program is designed to robustly coadd Cosmic Origins Spectrograph (COS) and Space Telescope Imaging Spectrograph (STIS) spectra within the Mikulski Archive for Space Telescopes (MAST) in an automated fashion such that coadds are available for new data or archival data with updated calibrations. For each target within a visit or program, HASP employs a m…
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The Hubble Advanced Spectral Products (HASP) program is designed to robustly coadd Cosmic Origins Spectrograph (COS) and Space Telescope Imaging Spectrograph (STIS) spectra within the Mikulski Archive for Space Telescopes (MAST) in an automated fashion such that coadds are available for new data or archival data with updated calibrations. For each target within a visit or program, HASP employs a meticulous multi-stage filtering process to ensure data quality and creates coadded products for all central wavelengths (CENWAVEs) within specific gratings, as well as combined products using different gratings and instruments. The project also emphasizes making the code accessible to the user community for custom coaddition. As calibrations improve and new data are added to the archive, HASP products are re-created automatically so that they represent the best reduction of a given visit or program. Automated coadditions like those achieved by HASP can significantly enhance the combination of different CENWAVES, increase signal-to-noise ratios, and increase wavelength coverage. These properties make HASP a vital resource for astronomers using archival spectroscopic data from HST.
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Submitted 7 May, 2026;
originally announced May 2026.
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Overview of the New Hubble Spectroscopic Legacy Archive
Authors:
Ravi Sankrit,
John Debes,
Matthew Burger,
Van Dixon,
Anna Payne,
Leonardo Dos Santos,
Thomas Wevers,
Travis Fischer,
Peter Forshay,
Svea Hernandez,
Robert Jedrzejewski,
Rich Kidwell,
Lauren Miller,
Marc Rafelski,
David Rodriguez,
Robert Swaters,
Dan Welty,
Sara Anderson,
Thomas Bair,
Joleen Carlberg,
Brian Charlow,
Andrew Cortese,
Tracy Ellis,
Ben Falk,
Scott Fleming
, et al. (12 additional authors not shown)
Abstract:
The new Hubble Spectroscopic Legacy Archive (HSLA) provides coadded spectra of individual targets that have been observed with the Cosmic Origins Spectrograph (COS) and the Space Telescope Imaging Spectrograph (STIS) over their operating lifetime. HSLA uses data available in the Mikulski Archive for Space Telescopes (MAST). It automatically produces coadds whenever new data become publicly availab…
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The new Hubble Spectroscopic Legacy Archive (HSLA) provides coadded spectra of individual targets that have been observed with the Cosmic Origins Spectrograph (COS) and the Space Telescope Imaging Spectrograph (STIS) over their operating lifetime. HSLA uses data available in the Mikulski Archive for Space Telescopes (MAST). It automatically produces coadds whenever new data become publicly available or when there is newly recalibrated data. HSLA defines individual targets by their associated coordinates, accounting for proper motions, and uses SIMBAD, NED and the Phase II observing proposals to obtain astronomical classifications for each object. Coadded spectra are produced for each observing mode. In the case of COS far-ultraviolet observations there is one coadded spectrum for each lifetime position (LP). Additionally, a spectrum spanning the entire wavelength range covered by the observations is produced by abutting the spectra from a selection of individual modes. For each individual target, HSLA also provides a human-readable metadata file with key information that can be used in searches or for further exploration of the data. The HSLA project also makes the code used for coadding spectra publicly available along with several other tools (using Jupyter notebooks) for custom coaddition required in special cases. In this report we will describe the main components of HSLA and provide a brief description of how the data and metadata can be accessed.
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Submitted 5 May, 2026;
originally announced May 2026.
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The Impact of the MAST Data Archive
Authors:
Richard A. Shaw,
Jenny L. Novacescu,
Sarah Weissman,
Travis A. Berger,
Clara E. Brasseur,
Jeff Chamblee,
Brian Cherinka,
Zachary R. Claytor,
Theresa Dower,
Chinwe Edeani,
Scott W. Fleming,
Jonathan R. Hargis,
Julie Imig,
Tim Januario,
Karen Levay,
Tim Kimball,
Jenn Kotler,
Hannah M. Lewis,
Steve Lubow,
Adrian Lucy,
Brian McLean,
Sunita G. Malla,
Jacob Matuskey,
Sophie J. Miller,
Susan E. Mullally
, et al. (9 additional authors not shown)
Abstract:
The Barbara A. Mikulski Archive for Space Telescopes (MAST) hosts science-ready data products from over twenty NASA missions, plus community-contributed data collections, and other select surveys. The data support forefront research in the ultraviolet, optical, and near-infrared wavelength bands. We have constructed bibliographies for each mission from publications in nearly 40 professional journa…
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The Barbara A. Mikulski Archive for Space Telescopes (MAST) hosts science-ready data products from over twenty NASA missions, plus community-contributed data collections, and other select surveys. The data support forefront research in the ultraviolet, optical, and near-infrared wavelength bands. We have constructed bibliographies for each mission from publications in nearly 40 professional journals, and have identified more than 37,000 refereed articles where investigators made a science usage of data hosted in MAST. The publication rate over the last 50 years shows that most MAST missions have had very high productivity during their in-service lifetimes, and have remained so for years or decades afterward. Annual citations to these publications, a measure of impact on research, are robust for most missions, with citations that grow over more than a decade. Most of the citations come from about 10% of articles within each mission.
We examined the bibliographies of the active missions HST and JWST in greater detail. For HST the rate of archival publications exceeded those authored by the original observing teams within a decade of launch, and is now more than 3 times higher. Early indications hint that JWST archival articles could dominate the publication rate even sooner. The production of articles resulting from any given observing program can extend for decades. Programs with small and very large allocations of observing time tend to be particularly productive per unit of observing time. For HST in general, a first publication appears within 1.5 yr for 50% of observing programs, and within 3.8 yr for 80% of programs. We discuss various external factors that affect publication metrics, their strengths and limitations for measuring scientific impact, and the challenges of making meaningful comparisons of publication metrics across missions.
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Submitted 19 December, 2025;
originally announced December 2025.
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The Multimission Archive at the Space Telescope Science Institute in the context of VO activities
Authors:
Inga Kamp,
Randall Thompson,
Alberto Conti,
Dorothy Fraquelli,
Tim Kimball,
Karen Levay,
Bernie Shiao,
Myron Smith,
Rachel Somerville,
Richard L. White
Abstract:
In the past year, the Multimission Archive at the Space Telescope Science Institute (MAST) has taken major steps in making MAST's holdings available using VO-defined protocols and standards, and in implementing VO-based tools. For example, MAST has implemented the Simple Cone Search protocol, and all MAST mission searches may be returned in the VOTable format, allowing other archives to use MAST…
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In the past year, the Multimission Archive at the Space Telescope Science Institute (MAST) has taken major steps in making MAST's holdings available using VO-defined protocols and standards, and in implementing VO-based tools. For example, MAST has implemented the Simple Cone Search protocol, and all MAST mission searches may be returned in the VOTable format, allowing other archives to use MAST data for their VO applications. We have made many of our popular High Level Science Products available through Simple Image Access Protocol (SIAP), and are implementing the VO Simple Spectral Access Protocol (SSAP). The cross correlation of VizieR catalogs with MAST missions is now possible, and illustrates the integration of VO services into MAST. The user can easily display the results from searches within MAST using the plotting tool VOPlot. MAST also participates in the NVO registry service. Thus, the user can harvest MAST holdings simultaneously with data from many other surveys and missions through the VO DataScope Data Inventory Service.
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Submitted 20 December, 2004;
originally announced December 2004.
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AGN in the Multimission Archive at STScI
Authors:
Paolo Padovani,
Tim Kimball
Abstract:
We describe a new WWW interface that allows the cross-correlation of an Active Galactic Nuclei catalog with various archives (HST, IUE, EUVE) available at the Multimission Archive at the Space Telescope Science Institute. Details of the catalog and the interface are provided.
We describe a new WWW interface that allows the cross-correlation of an Active Galactic Nuclei catalog with various archives (HST, IUE, EUVE) available at the Multimission Archive at the Space Telescope Science Institute. Details of the catalog and the interface are provided.
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Submitted 31 July, 1998;
originally announced July 1998.