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"11 results found.
- GRB 191004A: correction to reported GROND upper limits
- GRB 191004A: CALET Gamma-Ray Burst Monitor detection
- Konus-Wind observation of GRB 191004A
- GRB 191004A: Swift/UVOT Detection
- GRB 191004A: Optical Detection with LCO
- GRB 191004A: GROND Upper limits
- GRB 191004A: Swift-XRT refined Analysis
- GRB 191004A: Swift-BAT refined analysis
- GRB 191004A: NOT optical upper limits
- GRB 191004A: Enhanced Swift-XRT position
- GRB 191004A: Swift detection of a burst with an optical detection