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"20 results found.
- GRB 090102: HST observations and host galaxy
- GRB 090102: WSRT Radio Observations
- GRB 090102: optical decay
- VLA radio upper limit on GRB 090102
- GRB 090102: GRT Optical Observation
- Konus-Wind observation of GRB 090102
- GRB 090102: Hobby-Eberly Telescope Spectroscopy
- GRB 090102: P60 Imaging and P200 Spectroscopy
- GRB 090102 Observations from IAC80
- GRB 090102: GROND observations of the optical afterglow
- Swift UVOT observations of GRB 090102
- GRB 090102: Swift-BAT refined analysis
- GRB 090102: Swift burst of interest
- GRB 090102: Swift XRT refined analysis
- GRB 090102: NOT redshift
- GRB 090102: Enhanced Swift-XRT position
- GRB 090102: TAROT Calern observatory optical light curve
- GRB 090102: REM observations of a bright afterglow
- GRB 090102: Swift detection of a burst with an optical counterpart
- GRB 090102: TAROT Calern observatory optical observations