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.
- GRB 071003: OA power-law decay indices from KAIT
- GRB 061126: Radio Observations
- GRB 061126: a GRB detected off-axis by INTEGRAL
- Optical Afterglow observations of GRB 061126
- INT+WFC observations of GRB 061126
- GRB 061126: Possible Jet Break
- GRB 061126: RAPTOR Optical Detection During Gamma-Ray Emission
- GRB 061126: Early Super-LOTIS Observations
- GRB 061126: optical observation
- GRB 061126: Tautenburg afterglow observations
- GRB 061126 : SDSS Pre-Burst Observations
- GRB 061126: Swift-XRT refined analysis
- GRB 061126: Swift/UVOT Observations
- GRB 061126, Swift-BAT refined analysis
- GRB 061126: SARA Observations
- GRB 061126: Early Detection of the IR Afterglow
- GRB 061126: Faulkes Telescope North Optical Observations
- GRB 061126: Swift/UVOT Afterglow Detection
- GRB 061126: XRT position
- GRB 061126: Swift detection of a burst