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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"10822 results found.
- SGR1900+14
- BATSE on-board GRB trigger change
- GRB 980519 Optical Observations
- GRB980519 BATSE Observations
- GRB970519, optical follow-up at Schmidt Calern
- GRB980519 optical observations
- GRB 980519 Optical Observations
- GRB980519, BeppoSAX-WFC updated position
- GRB980519, BeppoSAX-WFC position
- GRB 980425 Radio Light Curve
- GRB980425 BATSE observations
- GRB 980329 ROSAT observation
- GRB980329 optical observations
- GRB980329 optical observations
- GRB980329 optical observations
- GRB 971227: Optical Observations
- GRB971227: LOTIS observations
- GRB 971214: EUVE Observations
- GRB 971024: USNO Observations
- IRAS 18119-1342 and the possible new SGR
- Possible new SGR from US Naval Observatory
- RXTE Observations of SGR 1814-13