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"17 results found.
- GRB 090812: Skynet/PROMPT and GORT Observations
- GRB 090812: Konus-Wind and Swift/BAT joint spectral analysis
- GRB 090812: Suzaku WAM observation of the prompt emission
- VLA radio non-detection of GRB 090812
- GRB 090812: WIRO NIR upper limit
- GRB 090812: Faulkes Telescope South Continued Optical Monitoring
- GRB 090812: RAPTOR detections during the burst
- GRB 090812: Swift XRT refined analysis
- GRB 090812, RIMOTS optical upper limits
- GRB 090812 Swift-BAT Refined Analysis
- GRB090812: Swift/UVOT observations
- GRB 090812: GROND Observations of the Optical/NIR Afterglow
- GRB 090812: Enhanced Swift-XRT position
- GRB 090812 VLT redshift
- GRB 090812: Liverpool Telescope afterglow confirmation
- GRB 090812: P60 Confirmation of Optical Afterglow
- GRB 090812: Swift detection of a burst with an optical counterpart