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 140907A: Continued DCT Observations
- GRB 140907A: Mondy optical observations
- GRB 140907A: 1.23m CAHA optical observations
- GRB 140907A: TShAO observations
- GRB 140907A: MASTER optical observations
- GRB 140907A: Nishi-Harima NIR Observations
- GRB 140907A: MITSuME Akeno Optical Observation
- GRB 140907A: Discovery Channel Telescope observations
- GRB 140907A: T100 observations
- GRB 140907A: Swift-BAT refined analysis
- GRB 140907A: Fermi GBM Detection
- GRB 140907A: redshift from the 10.4m GTC telescope
- GRB 140907A: Swift-XRT refined Analysis
- GRB 140907A: Enhanced Swift-XRT position
- GRB 140907A: MITSuME Ishigakijima Optical Observation
- GRB140907A: MITSuME Okayama Optical Observation
- GRB 140907A : Virtual Telescope optical observations
- GRB140907A: Swift UVOT detection
- GRB 140907A : Optical observations from Nanshan
- GRB 140907A: Swift detection of a burst with an optical counterpart