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"19 results found.
- GRB 141028A: Mondy optical observations
- GRB 141028A: TShAO optical observation
- GRB 141028A: SAO RAS Zeiss-1000 photometry
- GRB 141028A: Continued RATIR Observations
- GRB 141028A: Swift/UVOT followup observations
- GRB 141028A: P60 Observations and Decay Index
- GRB 141028A: Swift-XRT observations
- GRB 141028A: LCOGTN observations
- GRB 141028A: VLT/X-shooter redshift of z=2.33
- GRB141028A: Gemini-North redshift
- GRB 141028A: RATIR Optical and NIR Observations
- GRB 141028A: Swift/UVOT Detection
- GRB 141028A: Swift/XRT detection of the X-ray afterglow
- GRB 141028A: GROND Afterglow confirmation (MASTER source)
- IPN triangulation of GRB 141028A
- GRB 141028A Tiled Swift observations
- GRB 141028A: MASTER OT candidate detection
- GRB 141028A: Fermi GBM detection
- GRB 141028A: Fermi-LAT detection