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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').

19136 results found.

  1. GRB980329 optical observations
  2. GRB980326 optical observations
  3. GRB980326 optical observations
  4. GRB980326 optical observations
  5. GRB980326 optical observations
  6. GRB970508 SAO RAS optical observations
  7. Optical Observations of GRB 970508
  8. GRB 971214: Redshift from Keck Observations
  9. GRB971214: Keck R & I-band Observations
  10. GRB 971227: Optical Observations
  11. Optical Observations of the GRB 971227 field
  12. Optical Observations on GRB 971227
  13. GRB971227: Plaskett R-band observations
  14. Optical Observations for GRB 971227
  15. GRB971227: Further CAHA R-band images
  16. GRB971227: LOTIS observations
  17. GRB 971227: CAHA R-band images
  18. GRB 971227: Optical observations
  19. GRB971214: Optical Observations and Calibrations
  20. Sub-millimeter Observations of GRB 971214 at the JCMT
  21. GRB 971214: EUVE Observations
  22. GRB 971214: Redshift from Keck Optical Observations
  23. GRB 971214: Redshift from Keck Optical Observations
  24. GRB 971214: Apache Point Observatory Optical Observations
  25. GRB 971214: KPNO Optical Observations
  26. Optical Observations of GRB 971214 at Keck
  27. GRB 971214: Optical Observations
  28. Radio Observations of GRB 971214 at the VLA
  29. GRB 971214: USNOFS Observations Summary
  30. GRB 971024: KPNO Optical Observations Summary
  31. GRB 971024: Refined analysis by USNOFS Observations
  32. GRB 971024: KPNO Optical Observations
  33. GRB 971024: USNO Observations
  34. RXTE Observations of SGR 1814-13
  35. GRB 970828: Palomar Observations
  36. GRB 970228: Keck/LRIS Optical Observations

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