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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"

15 results found.

  1. GRB 140512A: Redshift from NOT
  2. GRB 140512A: MASTER prompt and afterglow optical observations
  3. Konus-Wind observation of GRB 140512A
  4. GRB 140512A: Continued UVOT Observations
  5. GRB 140512A: Fermi GBM detection
  6. GRB 140512A: Xinglong TNT optical observation
  7. GRB 140512A: Swift-BAT refined analysis
  8. GRB140512A : GROND observations
  9. GRB 140512A: Swift-XRT refined Analysis
  10. GRB 140512A: Enhanced Swift-XRT position
  11. GRB 140512A: Optical observations from the 2.5 m NOT
  12. GRB 140512A: Mondy optical detection
  13. GRB 140512A: MASTER OT decay and early light curve
  14. GRB 140512A: Swift detection of a burst with an optical counterpart
  15. GRB 140512A: MASTER optical observations

Advanced

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