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"14 results found.
- GRB 090926a, SMARTS optical/IR afterglow observations
- GRB 090926A: Late-time Gemini South Observations and Possible Jet Break
- RT-2 observation of the bright GRB 090926A
- GRB 090926A: Skynet/PROMPT Observations of Day 6 - 11 Fading
- GRB 090926A: Skynet/PROMPT Observations of Day 4 - 6 Fading Rate
- GRB 090926A: Skynet/PROMPT Observations of Post-Peak Fading
- GRB 090926A: Fermi LAT and GBM refined analysis
- Konus-Wind and Konus-RF observations of GRB 090926A
- GRB 090926A: Skynet/PROMPT Continued Observations
- GRB 090926A: Suzaku WAM observation of the prompt emission
- GRB090926A: Swift/UVOT observations
- GRB 090926A: VLT/X-shooter redshift
- GRB 090926A: Swift/UVOT detection of an optical afterglow
- GRB 090926A: Skynet/PROMPT Discovery of the Optical Afterglow