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"18 results found.
- GRB 141004A: Continued Late Time RATIR Optical and NIR Observations
- GRB 141004A: Continued RATIR Late Time Optical and NIR Observations
- GRB 141004A: RATIR Late Time Optical and NIR Observations
- GRB 141004A: La Palma late-time observations and possible brightening
- GRB141004A: Host galaxy redshift form GTC
- GRB 141004A: Fermi GBM observation
- GRB 141004A: GROND observations
- GRB 141004A: Swift-XRT refined Analysis
- GRB 141004A: Swift-BAT refined analysis
- GRB141004A: NOT imaging and spectroscopy
- GRB 141004A: Swift/UVOT Detection
- GRB 141004A: RATIR Optical Observations
- GRB 141004A: Monte Agliale Observatory optical observations
- GRB 141004A: Enhanced Swift-XRT position
- GRB 141004A: TNG photometric and spectroscopic observations
- GRB 141004A: 1.23m CAHA optical observations
- GRB 141004A: a long GRB detected by INTEGRAL
- GRB 141004A: Swift detection of a burst with an optical counterpart