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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').

18 results found.

  1. GRB 240218A: ALMA detection
  2. GRB 240218A: Chandra Detection and Jet Break Confirmation
  3. GRB 240218A: NOEMA upper limit
  4. GRB 240218A: CMO SAI NIR upper limit
  5. GRB 240218A: VLA detection
  6. GRB 240218A: MeerLICHT upper limits
  7. GRB 240218A: LBT H-band detection
  8. GRB 240218A: Swift-BAT refined analysis
  9. Konus-Wind detection of GRB 240218A
  10. GRB 240218A: Swift-XRT refined Analysis
  11. GRB 240218A: VLT/X-shooter redshift of z = 6.782
  12. GRB 240218A: Fermi GBM Detection
  13. GRB 240218A: VLT/FORS2 z-band detection
  14. GRB 240218A: Enhanced Swift-XRT position
  15. GRB 240218A: REM detection of a NIR afterglow candidate
  16. GRB 240218A : r-band upper limit from Observatoire de Haute-Provence
  17. GRB240218A: VLT/X-shooter upper limits
  18. GRB 240218A: Swift detection of a burst

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