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 120811C: optical observations
- GRB 120811C: optical observations
- GCN for GRB 120811C
- GRB 120811C: EVLA Observations
- GRB 120811C: RTT150 optical observations
- GRB 120811C: MASTER-Tunka OT observations
- GRB 120811C: Swift-BAT refined analysis
- GRB 120811C: NOT redshift
- GRB 120811C: Bassano Bresciano Observatory optical observations
- GRB 120811C: Swift-XRT refined Analysis
- GRB 120811C: Swift/UVOT Detection
- GRB 120811C: Redshift from OSIRIS/GTC
- GRB 120811C: RTT150 optical observations
- GRB 120811C: Enhanced Swift-XRT position
- GRB 120811C: TAROT Calern observatory optical observations
- GRB 120811C: MASTER-Amur observations of fading OT
- GRB 120811C: Swift detection of a burst with an optical counterpart