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"14 results found.
- GRB 170626A: 15 GHz upper limits from AMI
- Konus-Wind observation of GRB 170626A
- GRB 170626A: SAO RAS confirmation of OT fading
- GRB 170626A: TShAO optical observations
- GRB 170626A: Insight-HXMT observation
- GRB 170626A: OASDG optical observations
- GRB 170626A: MASTER-Tunka OT detection.
- GRB 170626A: Swift-BAT refined analysis
- GRB 170626A: TNG optical observations
- GRB 170626A: Afterglow detection from 1.5m OSN
- GRB 170626A: SAO RAS possible OT detection
- GRB 170626A: Swift-XRT refined Analysis
- GRB 170626A: Fermi GBM observation
- GRB 170626A: Swift detection of a burst