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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"

13 results found.

  1. GRB 151215A: TAROT Calern observatory very early optical detection
  2. GRB 151215A: TSHAO optical observations
  3. GRB151215A: Early optical light curve from pt5m, La Palma
  4. GRB 151215A: MITSuME Akeno optical upper limits
  5. GRB 151215A: Swift-XRT refined Analysis
  6. GRB 151215A: Swift-BAT refined analysis
  7. GRB151215A: Swift/UVOT detection
  8. GRB 151215A: MASTER early OT detection and light curve
  9. GRB 151215A: NOT spectroscopy and redshift
  10. GRB 151215A: Enhanced Swift-XRT position
  11. GRB 151215A: GROND Detection of the Optical/NIR Afterglow
  12. GRB 151215A: Prompt enhanced Swift-XRT position
  13. GRB 151215A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
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Get involved on GitHub.

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