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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').

26 results found.

  1. GRB 210610A: Spectroscopy and redshift confirmation with the Himalayan Chandra Telescope
  2. IceCube-210210A: Two Additional Optical Candidate Counterparts Found by DECam
  3. GRB 210210A: Konus-Wind detection and joint Konus-Wind + Swift-BAT spectral analysis
  4. GRB 210210A: CAHA 2nd epoch and jet break confirmation
  5. IceCube-210210A: Four Candidate Optical Counterparts from DECam Observations
  6. IceCube-210210A: Upper limits from a search for additional neutrino events in IceCube
  7. GRB 210210A : 1.3m DFOT optical observations
  8. GRB 210210A as a BdHN II
  9. Swift-XRT observations of IceCube-210210A
  10. GRB 210210A: CAHA detection and likely jet break
  11. IceCube-210210A: No neutrino counterpart in ANTARES
  12. Fermi-LAT Gamma-ray Observations of IceCube-210210A
  13. GRB 210210A: FRAM-ORM afterglow detection
  14. GRB 210210A: Swift-BAT refined analysis
  15. IceCube-210210A: Upper limits from Fermi-GBM Observations
  16. IceCube-210210A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation
  17. IceCube-210210A: Two Candidate Counterparts from the Zwicky Transient Facility
  18. GRB 210210A: LCO Optical Afterglow Detection
  19. GRB 210210A: Swift/UVOT Detection
  20. IceCube-210210A: IceCube observation of a high-energy neutrino candidate event
  21. GRB 210210A: Swift-XRT refined Analysis
  22. GRB 210210A: Redshift from OSIRIS/GTC
  23. GRB 210210A: Enhanced Swift-XRT position
  24. GRB 210210A: MASTER afterglow observation
  25. Swift GRB 210210A: Global MASTER-Net observations report
  26. GRB 210210A: Swift detection of a burst with an optical counterpart

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