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"20 results found.
- GRB 130313A: optical upper limit in CrAO
- GRB 130313A: optical upper limit in Mondy observatory
- GRB130313A: GTC early optical limits
- GRB 130313A: 5.8 GHz VLA upper limit
- GRB 130313A: Swift/UVOT Upper Limits
- GRB 130313A: RATIR Optical and NIR Observations
- GRB 130313A: TNG optical observations
- GRB 130313A: Swift-BAT Spectral lag analysis
- GRB 130313A: Fading X-ray Afterglow
- GRB130313A: Optical observations from GTC
- GRB 130313A: NOT optical upper limit
- GRB 130313A: Swift-XRT refined Analysis
- GRB 130313A: simultaneous and follow-up optical observations at BOOTES-3 and BOOTES-4
- GRB 130313A: Weihai optical upper limit
- GRB 130313A: Swift-XRT detection of a possible X-ray afterglow
- GRB 130313A: Swift-BAT refined analysis
- GRB 130313A: Zadko observatory - Gingin optical observations
- GRB 130313A: MASTER-Net optical observations
- GRB 130313A: Swift detection of a short burst
- GRB 130310A: optical observations