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.
- GRB160131A: detection of polarisation by Astrosat CZTI
- GRB 151006A: CALET Gamma-Ray Burst Monitor detection
- GRB 151006A: Astrosat CZTI detection
- GRB 151006A: Mondy optical upper limit
- GRB 151006A: MITSuME Akeno optical upper limits
- Konus-Wind observation of GRB 151006A
- GRB 151006A: OSN optical upper limit
- GRB 151006A: Swift-BAT refined analysis
- GRB 151006A: MITSuME Okayama Ks-band upper-limit
- GRB 151006A: Swift-XRT refined Analysis
- GRB 151006A: Fermi-LAT detection
- GRB 151006A: Swift/UVOT Upper Limits
- GRB 151006A: Fermi GBM detection
- GRB 151006A: Enhanced Swift-XRT position
- GRB 151006A: MITSuME Okayama upper limits
- GRB 151006A: Kanata/HOWPol optical imaging polarimetry
- GRB 151006A: Prompt enhanced Swift-XRT position
- GRB 151006A: Swift detection of a burst