Diffuse radio sources in galaxy clusters is a database of radio-astronomical observations of extended radio sources generated in the intra-cluster medium (ICM) of galaxy clusters. Currently the database includes all pointed observations of: radio relics, radio halos, radio mini-halos, and radio phoenixes.

How to query the database.

Simply hover your cursor above the QUERY button in the header to access the query form.

At the moment, you are able to constrain the query by name strings, ranges of coordinates, ranges of available properties. There is a switch to toggle coordinates from degrees to hour angle and vice versa. Furthermore, you can check/uncheck object classes as needed. Note that the processing time of your query scales with the number of found matches. It is possible to drop the entire database but writing the table will take a while.

The form allows you to check/uncheck table columns that you are interested in. The table delivers all known name aliases as well as a list of all measured properties with the corresponding reference links.

An export of your specific query results to a text file is available as well.

Are you a radio astronomer?

Give more visibility to your publication by sending us the value of your measurements and the reference! They will be added to the database and your work will not be missed in statistical studies.

Get In Touch

Did you spot any error? is a new project, we ask for your help to spot any mistake or inaccuracy in the database. Please contact us if you find anything wrong in the database or if you experience problems using the website.

Report database issue Report website issue

Our Team

Francesco de Gasperin


Marcus Brüggen

Reinout van Weeren

Kathrin Böckmann

Sören Witte


Jan.10 2020Bugfix for the downloadable text file.
Nov. 8 2018Bugfix for the query function.
Oct. 26 2018Query interface reworked. Table download formatting improved.
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If you use information from this database please acknowledge it with "This research made use of the radio astronomical database, maintained by the Observatory of Hamburg." and refer to this publication.

This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.

All galaxy cluster masses in the database are taken from Planck measurements ( 2016A&A...594A..27P).