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 130518A: Suzaku WAM observation of the prompt emission
- GRB 130518A: mm detection at PdBI
- GRB 130518A: Gemini Redshift confirmation
- GRB 130518A: 10.4m GTC/OSIRIS redshift
- GRB 130518A: Continued RATIR Optical Observations - Fading
- GRB 130518A: Confirmation of the X-ray afterglow.
- GRB 130518A: P60 Afterglow Observations
- GRB 130518A: RATIR Optical and NIR Observations
- GRB 130518A: Swift XRT and UVOT possible afterglow
- Konus-Wind observation of GRB 130518A
- GRB 130518A Swift-BAT position from ground analysis
- GRB 130518A: Fermi LAT detection
- GRB 130518A: Fermi GBM detection