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.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"18 results found.
- GRB 060116 HST observations
- GRB 060116: Further analysis of VLT photometry and optical spectroscopy
- GRB 060116: Radio Detection
- GRB 060116: MARGE optical observations
- GRB 060121: Swift XRT refined position
- GRB 060116: photometric redshift - the farthest GRB?
- GRB 060116: possible I-J dropout
- GRB 060116: UKIRT IR Observations
- GRB 060116: PROMPT Observations
- GRB 060116: VLT optical observations
- GRB 060116: Refined analysis of the Swift-BAT burst
- GRB 060116: XRT refined analysis
- GRB 060116: IR Candidate Afterglow
- GRB 060116: Swift/UVOT upper limits
- GRB 060116 : Lulin optical limit
- GRB 060116: ROTSE-III Optical Limits
- GRB060116: XRT position
- GRB 060116: Swift-BAT detection of a burst