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"15 results found.
- GRB 170714A: 15 GHz upper limits from AMI
- GRB 170714A: ATCA detection of the radio counterpart
- GRB 170714A: Chandra observations
- GRB170714A: XMM observation of the afterglow
- GRB 170714A: Bastille Day Burst redshift from OSIRIS/GTC
- GRB 170714A: NOEMA non-detection of the Bastille Day Burst
- Correction to GCN Circular 21351: GRB 170714A: Swift/UVOT Observations
- GRB 170714A: Swift/UVOT Observations
- GRB 170714A: TNG NIR observations
- GRB 170714A, Swift-BAT refined analysis
- GRB 170714A: z-band afterglow candidate for OSIRIS/GTC
- GRB 170714A: Bastille Day Burst: ULGRB or RTDE?
- GRB 170714A: Swift-XRT refined Analysis
- GRB 170714A: Enhanced Swift-XRT position
- GRB 170714A: Swift detection of a burst