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 140508A: VLA detection
- GRB 140508A: Mondy upper limit
- GRB 140508A: MITSuME Akeno Optical observation
- Swift Observations of GRB 140508A
- GRB 140508A: Continued RATIR Optical and NIR Observations
- GRB 140508A: HCT spectroscopy
- GRB 140508A: Swift/UVOT Detection
- GRB 140508A: RATIR Optical and NIR Observations
- GRB 140508A: Optical Observations via Virtual Telescope
- Konus-Wind observation of GRB 140508A
- GRB 140508A: Swift-XRT observations
- GRB 140508A: WHT spectroscopy
- GRB 140508A: NOT photometry and spectroscopy
- GRB 140508A: SAO RAS and MASTER photometric and spectroscopic observations
- GRB 140508A: 1.23m CAHA BVRI-band observations
- GRB 140508A: iPTF optical transient candidate
- IPN triangulation of GRB 140508A
- GRB 140508A: Fermi GBM detection