GCN Circulars
GCN Circulars are rapid bulletins submitted by and distributed to the community. 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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"26119 results found.
- GRB980703 optical followup
- GRB 980613 Optical Observations
- GRB980613 Optical Observations
- GRB980613 BeppoSAX-NFI follow up
- GRB 980519
- GRB980515, BeppoSAX IAUC to be submitted
- SAX J0840.7+2248 Optical Observations
- GRB 980329 ROSAT observation
- GRB980326 X-ray Observations
- GRB980329, Fading IR counterpart to radio source
- GRB980329 sub-millimeter observations
- GRB980329 near-IR observations
- GRB980329 optical observations
- GRB980329 VLA observations
- GRB980329 optical observations
- Near-IR follow-up on GRB 971227
- GRB971227: Plaskett R-band observations
- GRB 971227: Optical clarifications
- GRB971227: Further CAHA R-band images