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"17 results found.
- GRB 131004A: MOSFIRE NIR imaging
- GRB 131004A: Correction to XRT refined analysis
- GRB 131004A: Skynet PROMPT/DSO-14 upper limits
- GRB 131004A, Swift-BAT refined analysis
- GRB 131004A: Fermi GBM observation
- GRB 131004A: CARMA 93 GHz upper limit
- GRB 131004A: Swift/UVOT Detection
- GRB 131004A: RATIR Optical and NIR Upper Limits
- GRB 131004A: Swift-XRT refined Analysis
- GRB131004A: TNG Redshift confirmation
- GRB 131004A: GROND observations of the afterglow
- GRB 131004A: Enhanced Swift-XRT position
- GRB131004A: Magellan Redshift
- GRB 131004A: Liverpool Telescope optical afterglow observations
- GRB 131004A: TNG optical afterglow confirmation
- GRB 131004A: optical afterglow from the NOT
- GRB 131004A: Swift detection of a burst (may be short)