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"13 results found.
- GRB 080207: VLT NIR early upper limits
- GRB 080207: optical observations.
- GRB 080207: GROND upper limits
- GRB 080207, Swift-BAT refined analysis
- GRB 080207: Optical limits from Gemini-South
- GRB 080207: Super-LOTIS observations
- GRB 080207, Swift-BAT refined analysis
- GRB080207: RTT150 Optical Observations
- GRB 080207: REM NIR observations
- GRB 080207: TAROT Calern observatory optical observations
- GRB 080207: Swift-XRT Refined Analysis
- GRB 080207: Enhanced Swift-XRT position
- GRB 080207: Swift detection of a burst