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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').
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"

19 results found.

  1. IceCube-200806A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  2. IceCube200806A: No significant detection in HAWC
  3. GRB 200806A: CALET Gamma-Ray Burst Monitor detection
  4. GRB 200806A: Nanshan/NEXT optical upper limit
  5. GRB 200806A: CAHA optical afterglow confirmation
  6. IceCube-200806A: Upper limits from a search for additional neutrino events in IceCube
  7. GRB 200806A: VIRT optical observations
  8. GRB 200806A: Swift-BAT refined analysis
  9. GRB 200806A: Swift/UVOT Possible Detection
  10. GRB 200806A: Swift-XRT refined Analysis
  11. Fermi-LAT Gamma-ray Observations of IceCube-200806A
  12. GRB 200806A: AbAO optical upper limit
  13. GRB 200806A: AstroSat CZTI detection
  14. GRB 200806A: MITSuME Akeno optical upper limits
  15. GRB 200806A: Enhanced Swift-XRT position
  16. IceCube-200806A: Upper limits from Fermi-GBM Observations
  17. Swift GRB 200806A: Global MASTER-Net observations report
  18. GRB 200806A: Swift detection of a burst
  19. IceCube-200806A: IceCube observation of a high-energy neutrino candidate event

Advanced

Download all Circulars as a .tar.gz archive:
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