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"21 results found.
- GRB 131108A: VLA Observations
- GRB 131108A: ISON Blagoveshensk upper limit
- GRB 131108A: optical observations
- GRB 131108A: Continued RATIR Optical and NIR Observations
- Konus-Wind observation of GRB 131108A
- GRB 131108A: AGILE/GRID observation
- GRB 131108A: CARMA 3mm detection
- GRB 131108A: Fermi GBM observation
- GRB 131108A: Swift/UVOT Detection
- GRB 131108A: RATIR Optical and NIR Observations
- GRB 131108A: Swift-XRT observations
- GRB 131108A: TAROT-Calern optical observation
- GRB 131108A: Fermi-LAT refined analysis
- GRB 131108A: NOT optical observations
- GRB 131108A: Redshift from 10.4m GTC
- GRB 131108A: 1.23m CAHA optical candidate
- GRB 131108A: Swift detection of a possible X-ray afterglow
- IPN triangulation of GRB 131108A - correction
- IPN triangulation of GRB 131108A
- GRB 131108A Tiled Swift observations
- GRB 131108A: Fermi-LAT onboard detection of a burst