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"18 results found.
- GRB 080605: TLS RRM Analysis, Plateau/Rebrightening, Red OT
- GRB 071003: Infrared Photometry with Keck Adaptive Optics
- GRB 071003: XRT refined analysis
- Radio detection of GRB 071003 with the VLA
- GRB 071003: VLT spectroscopy
- GRB 071003: Keck spectroscopy
- Konus-Wind observation of GRB 071003
- GRB 071003: Possible rebrightening
- GRB 071003 : Lulin R-band observations
- GRB 071003: Swift XRT position
- GRB 071003: OA power-law decay indices from KAIT
- GRB 071003: Keck HIRES spectroscopy
- GRB 071003, Swift-BAT refined analysis
- GRB 071003: MARGE Observations
- GRB 071003 Optical observations
- GRB 071003: P60 Confirmation of Optical Afterglow
- GRB 071003: KAIT optical afterglow observations
- GRB 071003: Swift detection of a bright burst