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"16 results found.
- GRB 160314A: 15 GHz upper limits from AMI
- GRB 160314A: Continued RATIR Optical and NIR Observations
- GRB 160314A: GROND optical/NIR observations
- GRB 160314A: ISON-Ussuriysk optical upper limit, updated photometry and correction of GCN 19184
- GRB 160314A: RATIR Optical and NIR Observations
- GRB 160314A: Mondy optical observations
- GRB 160314A: VLT/X-shooter redshift
- GRB 160314A: NOT afterglow observations
- GRB 160314A: Swift-XRT refined Analysis
- GRB 160314A: Optical observations from OSN
- GRB 160314A: Swift-BAT refined analysis
- GRB 160314A: Swift/UVOT Detection
- GRB 160314A: Enhanced Swift-XRT position
- GRB 160314A: ISON-Ussuriysk optical upper limit
- GRB 160314A: Weihai optical upper limit
- GRB 160314A: Swift detection of a burst