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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').

22274 results found.

  1. GRB980703: Radio transient
  2. GRB 980703: Spectrum of the proposed optical counterpart
  3. GRB980703 Transient Optical Follow-Up
  4. GRB980703: LOTIS observation at early times
  5. GRB980613 Optical Observations
  6. GRB980703 (I band observations)
  7. BeppoSAX NFI observations of GRB 980703
  8. GRB980519 observation report
  9. GRB980703 optical followup
  10. Radio observations of SGRs
  11. SGR1900+14 field optical observations
  12. GRB980613, optical observations
  13. GRB 980613: Optical transient and its host galaxy
  14. SGR1627-41, RXTE/ASM observations
  15. GRB 980613: Detection of the probable host galaxy
  16. Reduced error box of SGR 1627-41
  17. GRB 980613: BATSE Observations
  18. GRB 980613 Optical Observations
  19. GRB 980613 optical observations
  20. Discovery of a new SGR source, SGR1627-41
  21. GRB980613 Optical Observations
  22. GRB980613 observations from Palomar
  23. GRB 980613 optical/IR obs.
  24. GRB980613 Near Infra-Red Observations
  25. GRB971214 Secondary Standards
  26. GRB980519 Secondary Standards
  27. BATSE on-board GRB trigger change
  28. GRB 980519 Optical Observations
  29. GRB 980519
  30. GRB980519 optical observations
  31. GRB 980519 Optical Observations
  32. GRB980519 BATSE Observations
  33. GRB980519 Optical Observations
  34. GRB980519 Optical Observations
  35. GRB 980519 Optical Observations
  36. GRB980515, BeppoSAX IAUC to be submitted
  37. BSAX Observations of GRB980425 field
  38. IPN web site of GRBs
  39. GRB980425 BATSE observations
  40. SAX J0840.7+2248 Optical Observations
  41. GRB980425: optical obs.
  42. GRB980425: Radio Observations
  43. report on BSAX observations of GRB980425
  44. GRB 980329 ROSAT observation
  45. GRB980326 X-ray Observations
  46. GRB980326, optical observations
  47. GRB980326, optical observations
  48. GRB980329, Fading IR counterpart to radio source
  49. GRB980329 Keck K-band observations
  50. GRB980329 sub-millimeter observations
  51. GRB980329 optical observations
  52. GRB980329 near-IR observations
  53. GRB980329 near-IR observations
  54. GRB980326 optical observations
  55. GRB980329 optical observations
  56. GRB980329 VLA observations
  57. GRB980329 optical observations
  58. GRB980329 optical observations
  59. GRB980326 optical observations
  60. GRB980326 optical observations
  61. Untitled
  62. Untitled
  63. Untitled
  64. Untitled
  65. Untitled
  66. Untitled
  67. Untitled
  68. Untitled
  69. Untitled
  70. GRB 971214: Optical Observations
  71. Radio Observations of GRB 971214 at the VLA
  72. Untitled
  73. GRB 971024: KPNO Optical Observations
  74. GRB 970828: Palomar Observations

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