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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. 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.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

16 results found.

  1. GRB 121123A: optical observations
  2. GRB 121123A: NIKA (New IRAM KID Arrays) millimetre observations at the 30-m Pico Veleta telescope
  3. GRB 121201A: BOOTES-4 optical observations
  4. GRB 121123A: Suzaku WAM observation of the prompt emission
  5. GRB 121123A: Swift/UVOT Observations
  6. GRB 121123A: GROND observations
  7. GRB 121123A: Enhanced Swift-XRT position
  8. GRB 121123A: Swift-BAT refined analysis
  9. GRB 121123A: Swift-XRT refined Analysis
  10. GRB 121123A: optical observations
  11. GRB 121123A: BOOTES-4 and IAC80 optical observations
  12. GRB 121123A: NOT optical observations
  13. GRB 121123A: Fermi GBM observation
  14. GRB 121123A: MASTER-NET optical limit
  15. GRB 121123A: GMG optical observation
  16. GRB 121123A: Swift detection of a burst with optical counterpart

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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