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"16 results found.
- GRB 090715B: Skynet/PROMPT Detections
- GRB 090715B: Late-time Lick 3m observations
- GRB 090715B: VLA radio detection
- GRB 090715B: further NOT optical observations
- GRB 090715B: Lick observations
- GRB 090715B: MASTER optical limit
- Konus-Wind and Konus-RF observations of GRB 090715B
- GRB 090715B: Swift/UVOT followup observations
- GRB 090715B: break in the optical afterglow decay
- GRB 090715B: Enhanced Swift-XRT position
- GRB 090715B: Observation of the optical afterglow
- GRB 090715B: Swift XRT Refined Analysis
- GRB 090715B: Swift-BAT refined analysis
- GRB 090715B: NOT optical observations
- GRB 090715B - Liverpool Telescope Optical Afterglow Candidate
- GRB 090715B: Swift detection of a burst with a possible optical counterpart