High Level Science Products are user-contributed observations, catalogs, or models that complement, or are derived from, MAST-supported missions. This page describes the HLSP Search form, which is one way to find HLSP product collections.

On this page...

The HLSP Search form described on this page is not the only way to discover HLSP collections. Many collections have had some or all of their data ingested into our multi-mission database, which is accessible from the Multi-mission Portal and Astroquery.

The search form

Screenshot of the search form. The top row of components (HLSP name and abstracts) is labeled #1, the middle row of components (object type, mission, product type, waveband) #2, and the search bar #3.

The HLSP Search form includes text-based search fields (within the box labelled 1) and tag-based search fields (2) which create filters to match against HLSP collection metadata. Buttons in the search bar (3) can reset the form or apply your search criteria.

Boolean logic

There is a Boolean AND between individual search fields of any type. For example, if you search for "HLSP Name Contains=TASOC and Abstract Text Contains=cats", you will get no results, because no HLSP meets both criteria. Different Boolean logic applies within individual search fields, depending on the type: Boolean AND within a text-based field, Boolean OR within a tag-based field, as discussed below.

Text-based search fields

The HLSP Name and Abstract Text fields perform string-matching to HLSP names and abstracts, respectively. Within a single field, an HLSP must be a match for all space-separated strings that you enter (Boolean AND), but these strings do not need to match whole words or be in any particular order.

For example, when matching against Abstract Text

light curve

matches abstracts that contain either "light curve" or "lightcurve", and will not match abstracts that are missing the string "curve" even if they contain "light".


without a space only matches abstracts that contain "lightcurve" without a space.

curv ligh

would match abstracts that contain either "light curve" or "lightcurve". This query is for demonstration purposes only!

Matching against HLSP Name works the same way. In addition, matches to the abbreviated, parenthetical short name are ranked first in the results list, before matches to the long-form titles. For example,


will rank A Wide‑Field WFC3 Imaging Survey in the COSMOS Field (COSMOS‑DASH) above A Wide‑Field WFC3 Imaging Survey with Grism Spectroscopy in the COSMOS Field (3D‑DASH).

Tag-based search fields

The Object TypeMissionProduct Type, and Waveband fields will filter on tags that have been attached to HLSPs. Within a single field, an HLSP project that is a match for any of the selected tags will be included in the results (Boolean OR).

For example, when matching the Mission:


yields all HLSPs that are based on any of these missions, including HLSPs that are only based on TESS.

When matching multiple fields: 


and Waveband = Radio

yields no results because there is a Boolean AND between fields, and HLSPs based on Kepler/K2/TESS tend not to involve radio data.

For now, the product type and object type vocabularies have not been significantly updated in the move from the previous iteration of this form, and they contain some information gaps that may affect your search. Improved tagging vocabularies will be implemented in future versions of this form.

The search bar

Any filters you add will not be executed until you either click Filter Results or hit enter within a text-based search field. To clear all filters, click Clear Filters, which will also re-execute the search. A count of the number of results from your search is displayed below the Filter Results button. This number will not change until you execute a search.

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