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"16 results found.
- GRB 130305A: Gemini follow-up observations
- GRB 130305A: optical upper limit in Mondy observatory
- GRB 130305A: PTF P48 optical upper limits
- GRB 130305A: TLS Tautenburg observations
- GRB 130305A BAT refined circular
- GRB 130305A: Further Swift-XRT Observations
- GRB 130305A: Optical Observations
- GRB 130305A: Gemini-North upper limit
- GRB 130305A: Swift/UVOT Upper Limit
- GRB 130305A: RATIR Observations
- GRB 130305A: P60 Observations
- GRB 130305A: Swift/XRT detection of the afterglow
- Konus-Wind observation of GRB 130305A
- GRB 130305A: Fermi GBM observation
- GRB 130305A: Fermi LAT Detection
- GRB 130305A found in ground analysis of Swift/BAT data