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"16 results found.
- GRB 241105A: JWST photometric observations of the host galaxy
- GRB 241105A: ATCA radio detection
- GRB 241105A: ATCA Radio Upper Limits
- GRB 241105A: VLT/FORS2 refined spectroscopic redshift z = 2.681
- GRB 241105A: SVOM/GRM observation
- GRB 241105A: ePESSTO+ NTT optical afterglow detection
- GRB241105A: Gemini-South Optical Afterglow Detection
- GRB 241105A: VLT/FORS2 optical afterglow rapid fading
- GRB 241105A: Swift/UVOT Detection
- GRB 241105A: Swift/BAT-GUANO refined analysis of short burst with extended emission
- GRB 241105A: Fermi GBM Observation of a Short Burst with Extended Emission
- Konus-Wind detection of GRB 241105A (short with extended emission)
- GRB 241105A: SVOM/VT optical afterglow observations
- GRB 241105A: Swift ToO observations
- GRB 241105A: GOTO tentative optical counterpart candidate
- GRB 241105A: Fermi GBM Final Real-time Localization