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NASA ADS, the NASA Astrophysics Data System, is a literature discovery and citation service for astronomy, astrophysics and related space-science research. Researchers usually reach it through the web address ui.adsabs.harvard.edu, which is why it is also searched for as “adsabs”. It is a discovery index, not an identifier registry: it finds papers and tracks citations, while persistent identifiers such as ORCID iDs are issued elsewhere and connected to ADS.
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What is NASA ADS?
NASA ADS is a digital library portal for astronomy and astrophysics literature. The ADS team describes it, in its paper “Decades of Transformation: Evolution of the NASA Astrophysics Data System’s Infrastructure” (arXiv:2401.09685), as the primary digital library portal for researchers in astronomy and astrophysics, and as an open digital library system that has been expanding into space and eventually Earth sciences. In the late 2010s the system moved to a cloud-based microservices architecture with an open-source search engine, which the same paper credits with full-text search, a modern API, better uptime and new visualizations and analytics.
People shorten the name several ways: ADS, ADSABS, “the Astrophysics Data System”, or by the address of its search interface. They all refer to the same service. For comparison with other citation databases, see the CASRAI entries on Scopus and Web of Science. ADS is a subject-focused discovery tool, and any coverage or record-count figure should be taken from the ADS site itself, because published figures differ between sources.
Who operates and funds ADS?
According to the ADS Help home page, ADS is operated by the Smithsonian Astrophysical Observatory (SAO), and the page credits the Harvard Center for Astrophysics and the Smithsonian Institution. It states that the work is funded under NASA Cooperative Agreement 80NSSC21M0056 and that the views expressed do not necessarily reflect the views of NASA. In practice this means questions about the service go to the ADS help contact listed on its Help home page.
Who should use it, and do you need an account?
ADS is aimed at astronomers, astrophysicists and space scientists. It is also useful to research administrators and librarians who need to find or verify the literature of a physical-science group; for the discipline itself, see What Is Astrophysics?. The personal features described on the Help site, namely myADS (under User Preferences), ADS Libraries and the ORCID claiming workflow, rely on being signed in, and the ORCID instructions say to create an account if you need one. Check the official site for current account terms.
How to search ADS
The ADS Help site has a Getting Started section (“Searching for a Specific Paper” and “Beginning a literature search”) and a Making a Query section (“Search Syntax”, “Filter Your Search”, “Positional Field Searches”), plus a comprehensive list of Solr fields and operators. The Search Syntax page gives the following rules and examples.
Author searches
author:"Huchra, John"matches variants of the name.=author:"huchra, j"(equals sign in front) matches that exact form only.author:"^huchra, j"or^"huchra, j"restricts to first-author papers.
Year, phrase and Boolean searches
year:2000searches one year;year:2000-2005searches an inclusive range.- Quotation marks give an exact phrase, for example
title:"weak lensing". Unquoted words are combined with AND. - AND, OR, NOT and “-” are available. For example,
author:"huchra, j" -title:2massexcludes titles containing 2mass, andabstract:(QSO OR "dark energy")matches either term in the abstract.
Synonyms and acronyms
- A leading “=” turns off synonym expansion:
=title:star. - An all-capitals acronym matches only the acronym, so
title:STARandtitle:starare different searches.
The syntax page also covers searching by bibcode; follow the Help page for the exact format rather than typing one from memory.
Connect ORCID and claim your papers
This is the part most relevant to research information management. The ADS Help page “Claiming papers in ORCID” recommends this sequence:
- Sign in to ADS, creating an account if needed.
- Authenticate with ORCID using the ORCID button in the top navigation bar.
- Complete the ORCID settings page in ADS, including your current affiliation and name variations. ADS uses this so that it can track your claims and mark them as trusted.
- Turn ORCID mode on and search your name variations.
- Choose “Claim in ORCID” for each paper, or select several papers and use Claim in the “ORCID Bulk Actions” box in the right column.
- Wait for indexing, which the page says can take up to 24 hours, then search
orcid:followed by your ORCID iD to see the claimed papers.
The Help site also describes an alternate route in which claims reach your ORCID profile but are marked as less trusted in ADS, and notes that without the ADS settings page some claims may not be indexed. If you manage researcher profiles, the recommended route is therefore the one that goes through the ADS settings page. To understand what lands on the ORCID side, read the CASRAI entry on the ORCID record. The Help site also has a “Searching for papers in ORCID” page.
Libraries and myADS
The Help site lists ADS Libraries, with a “Creating and editing a library” page, and User Preferences covering myADS and Library Link Servers. Open those pages on the official site for the current steps and options.
Common problems
- Too few or too many author hits. The plain author search matches name variants; add the equals sign for an exact form, or the caret for first-author papers only.
- An acronym returns unrelated words. Use capitals (
title:STAR) to match only the acronym, and remember that synonyms are expanded unless you prefix “=”. - Claimed papers do not show in your ORCID search. Allow up to 24 hours for indexing, and check that the ORCID settings page in ADS is complete.
- Claims look less trusted. This is the documented outcome of the alternate claiming route; use the recommended sequence above.
- Unsure about coverage, limits or terms. Check the official site; this guide does not quote record counts or dates.
FAQ
What is NASA ADS?
NASA ADS is the NASA Astrophysics Data System, a digital library portal for astronomy and astrophysics literature, operated by the Smithsonian Astrophysical Observatory and funded under a NASA Cooperative Agreement.
What is adsabs?
“adsabs” is the short form of the ADS web address, ui.adsabs.harvard.edu, where the search interface lives. The Help documentation is published at adsabs.github.io/help.
Is NASA ADS an identifier system?
No. It is a discovery and citation index. Identifiers such as ORCID are created elsewhere and linked to ADS through the claiming workflow above.
Can I link my ORCID record to ADS?
Yes. Sign in, authenticate with ORCID from the top navigation bar, complete the ORCID settings page, then claim papers.
