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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"18 results found.
- GRB 100414A : EVLA Radio Detection
- GRB 100414A : WSRT Radio Detection
- GRB 100414A: Radio Afterglow Detection with the Expanded VLA
- GRB 100414A: CFHT optical observations
- GRB 100414A: Confirmation of the X-ray afterglow
- GRB100414A: SAO RAS optical observations
- GRB 100414A: Suzaku WAM observation of the prompt emission
- GRB 100414A: Swift/UVOT Observations
- GRB 100414A: Gemini-N observation (correction)
- GRB 100414A: GROND Detection of the Optical Afterglow
- GRB 100414A: Gemini-N candidate and redshift
- GRB 100414A: Enhanced Swift-XRT position of candidate afterglow
- GRB 100414A: Palomar Transient Factory Observations
- GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
- GRB 100414A: IPN Localization
- Konus-Wind observation of GRB 100414A (correction to GCN 10597)
- GRB 100414A: Fermi GBM detection
- GRB100414A: Fermi LAT detection