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"18 results found.
- Short GRB 210323A: likely host galaxy detection
- GRB 210323A: Insight-HXMT/HE detection
- GRB 210323A: MASTER optical observation
- GRB 210323A: Swift-BAT refined analysis
- GRB 210323A: Gemini-North Optical Source Detection
- Short GRB 210323A: GTC Observations
- Konus-Wind detection of GRB 210323A (short)
- GRB 210323A: Swift/UVOT Upper Limits
- GRB 210323A: Classification and redshift estimation
- GRB 210323A: Kitab optical upper limit
- GRB 210323A: Fermi GBM detection
- GRB 210323A: Mondy optical observations, counterpart detection
- GRB 210323A: Swift-XRT refined Analysis
- GRB 210323A: Enhanced Swift-XRT position
- GRB 210323A: NOT optical afterglow candidate
- Swift GRB 210323A: Global MASTER-Net observations report
- GRB 210323A: Nanshan/NEXT optical upper limit
- GRB 210323A: Swift detection of a short burst