GCN Circulars
GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.
Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"13 results found.
- GRB 071018: Revised BAT position
- GRB 071021: possible high-z burst
- GRB 071018: Mercator Telescope optical observations
- GRB 071018: SARA observations
- GRB 071018: Swift-XRT observation
- VLA radio observation of GRB 071018
- GRB071018: Correction to the GCN 6936
- GRB071018: Correction to the GCN 6936
- GRB071018: Correction to the GCN 6936
- GRB071018: Correction to the title of the GCN 6936
- GRB 071018: Possible OT from Xinglong TNT observation
- GRB 071018, Swift-BAT refined analysis
- GRB 071018?: Swift detection of a possible burst