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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').

14 results found.

  1. GRB 141015A: TAROT La Silla observatory optical observations
  2. GRB141015A iTelescope observation
  3. GRB 141015A: Swift-XRT afterglow confirmation and refined Analysis
  4. GRB 141015A: MITSuME Akeno upper limits
  5. GRB 141015A: Swift/UVOT Upper Limits
  6. GRB 141015A: MITSuME Okayama upper limits
  7. GRB 141015A: Swift-BAT refined analysis
  8. GRB 141015A: LCO-McDonald observations
  9. GRB 141015A: RATIR Optical Upper Limits
  10. GRB 141015A: Enhanced Swift-XRT position
  11. GRB 141015A: Super-LOTIS early observations
  12. GRB 141015A: ISON-NM early optical observations
  13. GRB 141015A: Swift/XRT localization
  14. GRB 141015A: Swift detection of a burst

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