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 120729A: KAIT Optical Observations
- GRB 120729A: Fermi GBM observation
- GRB 120729A: JCMT SCUBA-2 sub-mm observation
- GRB 120729A: break in the optical light curve
- GRB 120729A: Optical observations from OSN, BOOTES1/2 and IAC80
- GRB 120729A: RTT150 optical observations
- GRB 120729A: EVLA Observations
- Virtual Telescope observations of GRB 120729A
- GRB 120729A: Early RAPTOR Observations
- GRB 120729A: UKIRT Observation
- T100 observations of GRB 120729A
- GRB 120729A: Swift-XRT refined Analysis
- GRB 120729A: Swift/UVOT Detection
- GRB 120729A: Xinglong TNT optical upper limit
- GRB 120729A, Swift-BAT refined analysis
- GRB 120729A: Enhanced Swift-XRT position
- GRB 120729A Gemini-N redshift
- GRB 120729A: Swift detection of a burst with an optical afterglow