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"19 results found.
- GRB 140102A: TAOS early optical afterglow detection
- GRB 140102A: MITSuME Akeno Optical observation
- GRB 140102A: AAO optical upper limits
- GRB 140102A: Swift/UVOT Detection
- LOAO R-band Observation of GRB 140102A
- GRB 140102A: BOOTES-4 early optical observations
- GRB 140102A, Optical Observations
- GRB 140102A: P60 observations
- GRB 140102A: Fermi/GBM Observation
- Konus-Wind observation of GRB 140102A
- GRB 140102A: GROND observations
- GRB 140102A: MAXI/GSC detection
- GRB 140102A, Swift-BAT refined analysis
- GRB 140102A: Swift-XRT refined Analysis
- GRB 140102A: Fermi-LAT detection of a burst
- GRB 140102A: I-band observations from IAC80 and 1.23m CAHA telescopes
- GRB 140102A: Enhanced Swift-XRT position
- GRB 140102A: Early optical observations from Nanshan
- GRB 140102A: Swift detection of a burst with optical counterpart