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"15 results found.
- GRB 131127A: optically dark burst
- GRB 131127A: RATIR Rejection of High-z Candidate
- GRB 131127A: CQUEAN riz Observation
- GRB 131127A: Bassano Bresciano Observatory optical upper limit
- GRB 131127A: Swift/UVOT Upper Limits
- GRB 131127A: AROMA-N Optical Observation
- GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
- GRB 131127A: Swift-XRT refined Analysis
- GRB 131127A. 1.5m OSN optical limit
- GRB 131127A, Swift-BAT refined analysis
- GRB 131127A: Enhanced Swift-XRT position
- GRB 131127A: Mondy optical upper limit
- GRB 131127A: Nanshan optical upper limit
- GRB 131127A: MASTER-NET optical observations
- GRB 131127A: Swift detection of a burst