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 111008A : miniTAO/ANIR NIR observations
- EVLA 22 GHz Detection of GRB 111008A
- GRB 111008A: Swift/UVOT Upper Limits
- Konus-Wind observation of GRB 111008A
- GRB 111008A: IAC80 I-band observations
- GRB 111008A: VLT/X-shooter spectroscopy
- GRB 111008A: Swift-XRT refined Analysis
- GRB 111008A: Gemini spectroscopic redshift
- GRB 111008A, GROND observations
- GRB 111008A: NOT optical observation
- GRB 111008A: Gemini optical counterpart
- GRB 111008A: Enhanced Swift-XRT position
- GRB 111008A, Swift-BAT refined analysis,
- GRB 111008A: Swift detection of a burst