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"14 results found.
- Konus-Wind observation of GRB 200125A
- GRB 200125A: Swift-BAT refined analysis
- GRB 200125A: Further Swift-XRT observations
- GRB 200125A: Swift/UVOT Upper Limits
- GRB 200125A: Further RATIR Optical Observations and Confirmation of Fading
- GRB 200125A: AbAO optical upper limit
- GRB 200125A: TNG detection of a NIR counterpart candidate
- Correction to GRB 200125A: Swift-XRT refined analysis
- GRB 200125A: Swift-XRT refined Analysis
- GRB 200125A: Nanshan-0.6m optical upper limit
- GRB 200125A: RATIR Optical Observations
- Swift GRB 200125A: Global MASTER-Net observations report
- GRB 200125A: Enhanced Swift-XRT position
- GRB 200125A: Swift detection of a burst