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.
- GRB 120711A: ATCA 34GHz final observations (upper limit)
- GRB 120711A: INTEGRAL/SPI observations
- GRB 120711A: ATCA 34GHz further observations (upper limit)
- GRB 120711A: Fermi LAT Detection
- GRB 120711A: ATCA 34GHz upper limit
- GRB 120711A: Swift/UVOT Observations
- Konus-Wind observation of GRB 120711A
- GRB 120711A: Fermi LAT detection
- GRB 120711A: MASTER early OT detection
- GRB 120711A: Swift-XRT observations
- GRB 120711A Gemini-S likely redshift
- GRB 120711A: REM NIR early time detection
- GRB 120711A: GROND photometric redshift
- GRB 120711A: Fermi GBM observation
- GRB 120711A: MAXI/GSC detection
- GRB 120711A: a possible X-ray transient
- GRB 120711A: an bright long GRB detected with INTEGRAL
- GRB 120711A: ROTSE-III confirm of Optical Counterpart