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"11 results found.
- VLA observation of GRB 070220
- GRB 070220: pseudo-z~2.15 from spectral parameters of the prompt
- Konus-Wind and Konus-A observations of GRB 070220
- GRB 070220: MITSuME Okayama Optical Observation
- GRB 070220: ART-3 Optical and NIR limits
- GRB 070220 Swift-BAT Refined Analysis
- Swift/UVOT refined analysis of GRB070220
- GRB 070220: Swift-XRT Refined Analysis
- GRB 070220: Observation with the KANATA 1.5m telescope
- GRB 070220 : Faulkes Telescope North optical limit
- GRB 070220: Swift detection of a burst