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"13 results found.
- GRB 050315: potential host galaxy
- Refined Swift XRT positions for GRB050315, GRB050318 and GRB050319
- GRB 050315: Variability Analysis of Swift BAT Time History
- GRB 050315, SMARTS optical afterglow decay
- GRB 050315: Swift-BAT further refined analysis
- GRB 050315, SMARTS optical/IR afterglow observations
- GRB 050315 I-band observations
- GRB 050315: Absorption redshift
- GRB 050315: Optical afterglow identification
- Non-detection of GRB050315 in ATCA Radio Observations
- GRB 050315: Swift XRT Position
- GRB 050315: Early Observations with Swift/UVOT
- Swift-BAT detection of GRB 050315