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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"

14 results found.

  1. VLA observation of GRB 070224
  2. GRB 070224: Optical afterglow confirmation
  3. GRB 070224: Swift/UVOT Upper Limits
  4. GRB070224: Magellan Imaging Observations
  5. GRB 070224: WHT K-band imaging
  6. GRB 070224: MDM Observations
  7. GRB 070224: SARA upper limit
  8. GRB070224: Swift-XRT Refined Analysis
  9. GRB 070224: optical afterglow candidate
  10. GRB 070224, Swift-BAT refined analysis
  11. GRB 070224: MASTER-Net refind analysis
  12. GRB 070224: MASTER-VWF-Kislovodsk observations
  13. GRB 070224: MASTER observations
  14. GRB 070224: Swift detection of a burst

Advanced

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