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.
- Konus-Wind detection of GRB 210619B
- Konus-Wind observation of exceptionally bright GRB 140219A
- Konus-Wind observation of GRB 130427A
- GRB 110918A: Optical light curve for days 1.4 to 16.3
- GRB110918A: Lick Observations
- GRB 110918A: Liverpool Telescope optical observations
- GRB 110918A: submm observations from APEX
- GRB 110918A: Swift-XRT refined Analysis
- GRB 110918A: Spectroscopy from GTC
- GRB 110918A: Swift/UVOT Detection of the Optical Counterpart
- GRB 110918A: rest-frame energetics in gamma-gays
- GRB 110918A optical observation
- GRB 110918A: Gemini-N redshift
- GRB 110918A: Afterglow Confirmation from PTF
- GRB 110918A: GROND detection of the afterglow candidate
- GRB 110918A: INT optical detection of Swift candidate afterglow
- GRB 110918A: Swift-XRT observations
- GRB 110918A: pseudo-z= from prompt emission spectrum
- Konus-Wind observation of GRB 110918A
- IPN triangulation of GRB 110918A (long duration, extremely intense)