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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"

11 results found.

  1. GRB 100713A: second epoch Maidanak optical observation
  2. GRB 100713A: CrAO optical limits
  3. GRB 100713A: optical observation in Maidanak
  4. GRB 100713A: further inspection of TNG images
  5. GRB 100713A: Swift XRT refined analysis
  6. GRB 100713A : IRSF/SIRIUS NIR upper limits
  7. GRB 100713A: GROND upper limits
  8. GRB 100713A: optical upper limit
  9. GRB 100713A: TNG optical observations
  10. GRB 100713A: TELMA and 1.5m OSN optical observations
  11. GRB 100713A: a long GRB detected by INTEGRAL

Advanced

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