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"18 results found.
- GRB 140215A: RAPTOR Observations During Gamma-Ray Emitting Interval
- GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
- GRB 140215A: WSRT radio observation
- GRB 140215A: Continued RATIR Optical and NIR Observations
- Konus-Wind observation of GRB 140215A
- GRB 140215A: Swift/UVOT Detection
- GRB 140215A: Continued RATIR Optical and NIR Observations
- GRB 140215A: MITSuME Okayama Optical Observation
- GRB 140215A: Swift-BAT refined analysis
- GRB 140215A: ISON-NM optical observations
- GRB 140215A: Swift-XRT refined Analysis
- GRB 140215A: P60 observations
- GRB 140215A: T24 optical observations
- GRB 140215A: Enhanced Swift-XRT position
- GRB 140215A: RATIR Optical and NIR Observations
- GRB140215A: Skynet PROMPT Optical Observations
- GRB 140215A: KAIT Optical Detection
- GRB 140215A: Swift detection of a burst with optical counterpart