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"13 results found.
- GRB 151215A: TAROT Calern observatory very early optical detection
- GRB 151215A: TSHAO optical observations
- GRB151215A: Early optical light curve from pt5m, La Palma
- GRB 151215A: MITSuME Akeno optical upper limits
- GRB 151215A: Swift-XRT refined Analysis
- GRB 151215A: Swift-BAT refined analysis
- GRB151215A: Swift/UVOT detection
- GRB 151215A: MASTER early OT detection and light curve
- GRB 151215A: NOT spectroscopy and redshift
- GRB 151215A: Enhanced Swift-XRT position
- GRB 151215A: GROND Detection of the Optical/NIR Afterglow
- GRB 151215A: Prompt enhanced Swift-XRT position
- GRB 151215A: Swift detection of a burst