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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. 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').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

11622 results found.

  1. GRB 180728A: Fermi GBM observation
  2. GRB 180727A: Fermi GBM observation
  3. GRB 180727A: Swift detection of a burst
  4. GRB 180720B: CALET Gamma-Ray Burst Monitor detection
  5. GRB 180720B: OAJ optical observations
  6. GRB 180722B: Insight-HXMT/HE detection
  7. GRB 180724A: Insight-HXMT/HE detection
  8. GRB 180720B long follow up requested
  9. GRB 180723A: Fermi GBM detection
  10. GRB 180718B: Swift-XRT observations
  11. GRB 180723A: CALET Gamma-Ray Burst Monitor detection
  12. GRB 180722B: CALET Gamma-Ray Burst Monitor detection
  13. GRB 180723.13: MASTER optical observation of the short Fermi GBM trigger number 554008254
  14. GRB 180723.76: MASTER optical observation of the bright long Fermi GBM trigger number 554062193
  15. GRB 180720B: ISON-Castelgrande optical observations
  16. GRB 180715B: AstroSat CZTI detection
  17. GRB 180715A: AstroSat CZTI detection
  18. Konus-Wind observation of GRB 180720B
  19. Fermi Trigger 553879512: MASTER optical observation
  20. GRB 180720B: MAXI/GSC detection
  21. GRB 180720C: Fermi GBM observation
  22. GRB 180720B: OSN detection, fading slower?
  23. GRB 180720B: Fermi GBM observation
  24. GRB 180720B : Fermi-LAT detection
  25. GRB 180720A: Fermi GBM observation
  26. GRB 180718A: MASTER optical observation
  27. GRB180715B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 553369644)
  28. GRB 180718B: Fermi GBM detection
  29. GRB 180718B: Swift ToO observations
  30. GRB 180718B: Fermi-LAT detection
  31. GRB 180718A: Fermi GBM detection
  32. GRB 180718A short GRB detected by IPN and found in ground analysis of BAT data
  33. GRB 180715A: CALET Gamma-Ray Burst Monitor detection
  34. GRB 180715A: Fermi GBM detection
  35. IceCube-171106A: MASTER optical observation
  36. GRB 180703A: optical afterglow confirmation
  37. GRB 180703B: further analysis of CGBM data
  38. GRB 180703A: Swift-XRT afterglow detection
  39. Konus-Wind observation of GRB 180703A
  40. GRB 180703A: MASTER optical observation
  41. IPN Triangulation of GRB 180703A
  42. GRB 180706A: Fermi GBM observation
  43. Konus-Wind observation of GRB 180703B
  44. IPN Triangulation of GRB 180703B
  45. Fermi GBM triggers 552488966/180705548 and 552490104/180705561 are not GRBs
  46. GRB 180703A: AstroSat CZTI detection
  47. GRB 180703A: Swift/UVOT Upper Limits
  48. GRB 180703B: Fermi GBM detection
  49. GRB 180703A: Fermi GBM detection
  50. GRB 180703A: LCO Sutherland possible optical candidate
  51. GRB 180703A: Swift-XRT observations
  52. GRB150101B: INTEGRAL prompt gamma-ray signal from a possible GRB170817A-analogue
  53. GRB 180703B: CALET Gamma-Ray Burst Monitor detection
  54. GRB 180703B: Fermi-LAT detection
  55. GRB 180703A: Fermi-LAT detection
  56. GRB 180703A: Tiled Swift observations
  57. GRB 180630A: Fermi GBM detection
  58. GRB 180626C / Fermi trigger 551697835: MASTER inspection
  59. GRB 180626C: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 551697835)
  60. IPN Triangulation of GRB 180626C (short)
  61. GRB 180623B: CALET Gamma-Ray Burst Monitor detection
  62. GRB 180620B: AstroSat CZTI detection
  63. GRB 180618A: AstroSat CZTI detection
  64. Konus-Wind observation of GRB 180620B
  65. Konus-Wind observation of GRB 180618A (a short GRB with extended emission)
  66. GRB 180620B: Fermi GBM detection
  67. GRB 180611A: AstroSat CZTI detection
  68. GRB 180618A: Fermi GBM detection
  69. Konus-Wind observation of GRB 180611A
  70. GRB 180611A: Fermi GBM observation
  71. IPN Triangulation of GRB 180611A (long)
  72. GRB 180605A: Fermi GBM observation
  73. IPN Triangulation of GRB 180605A (long)
  74. Fermi GBM trigger 180604900/549840956 likely not a GRB
  75. GRB 180602B: Fermi GBM detection
  76. Fermi GBM trigger 549533811/180601345 is not a GRB
  77. GRB180523B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 548793993)
  78. Fermi GBM trigger 548829437/180524192 is not a GRB
  79. GRB 180505A: AstroSat CZTI detection
  80. GRB 180427A: AstroSat CZTI detection
  81. GRB 180505A: Fermi GBM detection
  82. GRB 180416A: AstroSat CZTI detection
  83. GRB 180416B: AstroSat CZTI detection
  84. Konus-Wind observation of GRB 180427A
  85. IPN Triangulation of GRB 180427A
  86. GRB 180427A: Fermi GBM detection
  87. Fermi GBM trigger 545979055/180421202 is not a GRB
  88. GRB 180418A: Fermi GBM observation
  89. GRB 180416B: CALET Gamma-Ray Burst Monitor detection
  90. GRB 180404B: AstroSat CZTI detection
  91. GRB 180416A: Fermi GBM detection
  92. GRB 180411A: CALET Gamma-Ray Burst Monitor detection
  93. Konus-Wind observation of GRB 180411A
  94. GRB 180410A: Fermi GBM observation
  95. GRB 180409A CALET Gamma-Ray Burst Monitor detection
  96. GRB 180411A: Fermi GBM detection
  97. GRB 180409A: Fermi GBM observation
  98. Konus-Wind observation of GRB 180404C
  99. IPN Triangulation of GRB 180409A
  100. Konus-Wind observation of GRB 180404B

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