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"14 results found.
- GRB 120716A: optical observation in Maidanak observatory
- GRB 120716A: optical observation in CrAO
- GRB 120716A: Fermi GBM observation
- GRB 120716A: EVLA Detection
- GRB 120716A: Swift-XRT detection
- GRB 120716A: Swift/XRT position consistent with that of the optical counterpart
- GRB 120716A: Redshift confirmation from VLT/X-shooter
- VLT/FORS2 redshift of GRB120716A
- GRB 120716A: GROND confirmation of the optical/NIR afterglow
- GRB 120716A: Typo correction in GCN 13490
- GRB 120716A: Optical decay from NOT
- GRB 120716A: Candidate Optical Afterglow from PTF
- Konus-Wind observation of GRB 120716A
- IPN Triangulation of unusual GRB 120716A