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"13 results found.
- GRB 120324A: CrAO optical upper limit
- GRB 120324A, the review of the sky area in plate archives
- GRB 120324A: Swift-XRT refined Analysis
- Konus-Wind observation of GRB 120324A
- GRB 120324A: GROND observations
- GRB 120324A: CQUEAN rizY Observation
- GRB 120324A: Swift-BAT refined analysis
- GRB 120324A: Swift/UVOT Upper Limits
- GRB 120324A: TAROT La Silla observatory optical observations
- GRB 120324A: Enhanced Swift-XRT position
- GRB 120324A: Liverpool Telescope optical candidate
- GRB 120324A: UVOT Finding Chart Observation
- GRB 120324A: Swift detection of a burst