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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').

559 results found.

  1. GRB 060729: An update on the late-time Swift observations
  2. Konus-Wind observation of GRB 060904A
  3. Konus-Wind observation of GRB 060901
  4. GRB060729: analysis of XMM-Newton observation
  5. Swift-BAT trigger 215279 is not a GRB
  6. GRB 060526: Refined analysis of the Swift-BAT burst
  7. GRB 060522: Swift detection of a burst with possible optical afterglow
  8. GRB 060306: Swift-BAT refined analysis
  9. Konus-Wind observation of bright hard GRB 060213
  10. GRB 060211B: Swift/BAT refined analysis
  11. GRB 060210: Refined analysis of the Swift-BAT burst
  12. GRB 060202: Refined analysis of the Swift-BAT burst
  13. Konus-Wind observation of GRB 060124
  14. GRB 060117: PROMPT Observations
  15. GRB 060108: Refined XRT analysis
  16. GRB 051221B: Optical Observations with Kuiper 1.54m
  17. GRB 051221B: Refined analysis of the Swift-BAT burst
  18. Konus-Wind observation of GRB 051028
  19. Konus-Wind observation of GRB 051022
  20. GRB 050906, summary of radio observations
  21. GRB 051001: Swift Detection of a Burst
  22. GRB050922C: optical observation
  23. GRB 050827: Swift-BAT refined analysis
  24. GRB 050730: WSRT Radio Observations
  25. GRB050801: Swift-BAT detection of a burst
  26. GRB 050509b: Swift XRT Position
  27. IPN Summary of SGR1806-20 Activity in 2004
  28. IPN triangulation of GRB030413 (small error box)
  29. IPN triangulation of GRB021211B (two large error boxes)
  30. IPN triangulation of GRB020904
  31. IPN triangulation of GRB020715 (=GRB150702)
  32. IPN triangulation of GRB150702
  33. GRB020124 optical observations with RIBOTS/RIMOTS
  34. XRF/GRB 011030: Detection of the Probable Host Galaxy
  35. GRB 011030: TNG K-band observation
  36. XRF011030: J and K band observations
  37. XRF011030: Chandra Observations
  38. GRB 011030: K-band observations
  39. The X-ray Flash 011030 ('GRB 011030')
  40. GRB 011030, WSRT radio observations
  41. GRB011030 - further refinement WFC position
  42. GRB 011030, Radio observations
  43. GRB010220, Radio and Optical Observations
  44. GRB010213 (HETE) TAROT observations
  45. GRB 001109: deep JHK upper limits
  46. GRB 000301A, Radio Observations
  47. BEPPOSAX GRBM Localization of GRB991226
  48. IPN localization of GRB991226
  49. Optical Observations of GRB990627
  50. BeppoSAX NFI Observation of GRB980425
  51. GRB980425 Optical Follow-up
  52. GRB980425: X-ray revised positions
  53. GRB970519, optical follow-up at Schmidt Calern
  54. BSAX Observations of GRB980425 field
  55. GRB980425 BATSE observations
  56. GRB 980425 optical observations
  57. GRB980425: optical obs.
  58. GRB980425: Radio Observations
  59. GRB 980425 optical observations

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