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"10 results found.
- GRB 060117: Suzaku WAM observation of the prompt emission
- GRB 060117: PROMPT Observations
- GRB 060117: pseudo-z from spectral parameters of the prompt emission
- Correction to GCN 4542 on GRB 060117
- Konus-Wind observation of GRB 060117
- GRB 060117: Refined analysis of the Swift-BAT burst
- GRB 060117: FRAM refined analysis
- GRB 060117: FRAM optical afterglow candidate
- GRB 060117: nearby galaxy
- GRB 060117: Swift-BAT detection of a bright burst