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.
- GRB 120320A: optical upper limit in Mondy observatory
- GRB 120320A: early optical upper limit
- GRB 120320A: Zadko optical observations
- GRB 120320A, the review of the sky area in plate archives
- GRB 120320A: Swift/UVOT Upper Limits
- GRB 120320A: MITSuME Okayama Optical upper limits
- GRB 120320A , optical observations
- GRB 120320A: BOOTES-4 optical upper limit
- GRB 120320A: Swift-XRT refined Analysis
- GRB 120320A, Swift-BAT refined analysis
- GRB 120320A: Gemini-N and UKIRT observations
- GRB 120320A: Enhanced Swift-XRT position
- GRB 120320A: MASTER optical observations
- GRB 120320A: Swift detection of a burst