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 160816A: Possible radio afterglow detection at 15 GHz with AMI
- GRB 160816A, the review of the sky area in plate archives
- GRB 160816A: TSHAO optical observations
- GRB 160816A: ISON/UAFO optical observations
- GRB 160816A: Further RATIR Optical and NIR Observations
- GRB 160816A: MASTER OT early detection on coaded images
- GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
- GRB 160816A: confirmed fading with the LT
- GRB 160816A iTelescope observation
- GRB 160816A: Swift/UVOT Detection
- GRB 160816A: IPN annulus
- Konus-Wind observation of GRB 160816A
- GRB 160816A: RATIR Optical and NIR Observations
- GRB 160816A: LCOGT-FTN optical candidate
- GRB 160816A: Swift-XRT afterglow detection
- GRB 160816A: MASTER inspection
- GRB 160816A: Swift ToO observations
- GRB 160816A: Fermi-LAT detection