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"913 results found.
- Swift/UVOT refined analysis of GRB070531
- GRB 070412: Deep Keck imaging
- GRB 070224: Swift/UVOT Upper Limits
- GRB 061002: Swift detection of a burst: CORRECTED CONTENT
- GRB 061002: Swift detection of a burst
- GRB 060729: Refined analysis of the Swift-BAT burst
- GRB 050726: early Swift XRT analysis results
- Konus-Wind observation of GRB 050401
- IPN Summary of SGR1806-20 Activity in 2004
- GRB020305, optical observations
- GRB011130 (=XRF011130): Further analysis of Chandra Target of
- GRB980703 optical photometry
- GRB980703 Transient Optical Follow-Up