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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"

12182 results found.

  1. GRB 150821A, Swift-BAT refined analysis
  2. GRB 150821A: Swift-XRT refined Analysis
  3. GRB 150821A: Swift/UVOT Detection
  4. GRB 150818A: continued Mondy optical observations
  5. GRB 120729A: KAIT Optical Observations
  6. KAIT Optical Upper Limits for GRB 120422A, 120724A, 120803B, 120911A, and 120923A
  7. Konus-Wind observation of GRB 150819B
  8. IPN Triangulation of GRB 150819B (short / very intense)
  9. GRB 150818A: Mondy optical observations
  10. GRB 150819A: MASTER-IAC early upper limit
  11. GRB 150818A: Swift-XRT refined Analysis
  12. GRB 150818A: Swift/UVOT Detection
  13. GRB 150818A: Enhanced Swift-XRT position
  14. GRB 150818A: Swift-BAT refined analysis
  15. GRB 150818A: Swift/UVOT candidate afterglow
  16. GRB 150818A: Planned XMM-Newton observation
  17. GRB 150818A: Swift detection of a burst
  18. GRB 150817A: Swift-BAT refined analysis
  19. Konus-Wind observation of GRB 150811B
  20. GRB 150811A: KAIT Refined Analysis
  21. IPN Triangulation of GRB 150811B
  22. GRB 150811B: Fermi GBM detection
  23. GRB 150811A: KAIT optical candidate
  24. GRB 150811A: Swift detection of a burst
  25. Fermi GBM GRB Trigger 460608875: iPTF P48 Observations
  26. GRB 150801B: Swift-BAT refined analysis
  27. Fermi GBM GRB Trigger 458852670: iPTF P48 Observations
  28. GRB 150801B: Swift detection of a burst
  29. GRB 150801A: MAXI/GSC detection
  30. GRB 150728A: Swift detection of a GRB
  31. GRB 150727A: Watcher optical upper limit
  32. GRB 150727A: Swift/UVOT Detection
  33. GRB 150727A: Swift-XRT refined Analysis
  34. Konus-Wind observation of GRB 150724B
  35. Konus-Wind observation of GRB 150725A
  36. IGR J00291+5934, Swift-BAT refined analysis
  37. GRB 150724B: Fermi-LAT detection
  38. GRB 150725A: MAXI/GSC detection
  39. Trigger 650221: Swift detection of a IGR J00291+5934
  40. SGR 1E 1841-045 (Swift trigger 649113): Terskol upper limit
  41. GRB 150722A: Swift-XRT refined Analysis
  42. GRB 150722A: Swift-XRT observations
  43. GRB 150721A: Fermi GBM detection
  44. GRB 150716A: KAIT Optical Upper Limit
  45. Trigger 649113: Swift detection of SGR 1E 1841-045
  46. GRB 150711A: Swift-BAT refined analysis
  47. Konus-Wind observation of GRB 150710B
  48. GRB 150711A: Swift-XRT refined Analysis
  49. GRB 150711A: Swift detection of a burst
  50. Swift-XRT observations of GRB 150710A
  51. Konus-Wind observation of GRB 150710A (Swift trigger 648437)
  52. Trigger 648422: Swift possible detection of a source in NGC4552
  53. Konus-Wind observation of GRB 150702A
  54. GRB 150702A: Fermi-LAT detection
  55. Fermi Gamma-ray Burst Monitor Trigger 150626873 is not a GRB
  56. Fermi Gamma-ray Burst Monitor Trigger bn150628857 is not a GRB
  57. Konus-Wind observation of GRB 150627A
  58. GRB 150626B: Swift-XRT refined Analysis
  59. GRB 150627A: Fermi-LAT detection
  60. GRB 150626B: MASTER observations
  61. GRB 150626B: Swift detection of a burst
  62. V404 Cyg: MASTER Swift, Integral alert observations
  63. GRB 150622A: MAXI/GSC detection
  64. Swift triggers again on V404 Cyg
  65. Swift Trigger 644520 is V404 Cyg
  66. GRB 150616A: Swift-XRT refined Analysis
  67. Konus-Wind observation of Galactic transient V404 Cyg in outburst
  68. V404 Cyg: Swift/UVOT Detection
  69. Optical follow-up of Swift trigger on V404 Cyg
  70. GRB 150615A: Swift detection of a burst
  71. Konus-Wind observation of GRB 150608A
  72. GRB 150608A: Swift-XRT afterglow detection
  73. Konus-Wind observation of GRB 150607A
  74. GRB 150607A: Swift-XRT refined Analysis
  75. GRB 150518A: possible SN observations
  76. Konus-Wind observation of GRB 150530A
  77. Konus-Wind observation of GRB 150527A
  78. Konus-Wind observation of GRB 150523A
  79. GRB 150523A: Fermi-LAT detection
  80. GRB 150523A: Fermi GBM detection
  81. GRB 150518A: MAXI-GSC further analysis
  82. GRB 150518A: Mondy optical observations
  83. GRB 150518A: MASTER-net before, early and after optical stereoscopic observations with possible MP discovery inside MAXI error box
  84. Konus-Wind observation of GRB 150518A
  85. GRB 150518A: Swift-XRT follow-up observations
  86. GRB 150518A : Xinglong TNT upper limit
  87. GRB 150518A: SAO RAS optical observations
  88. GRB 150518A: Correction
  89. GRB 150518A: Swift-XRT afterglow detection
  90. Konus-Wind observation of GRB 150514A
  91. GRB 150514A: Swift-XRT afterglow detection
  92. GRB 150514A: Fermi-LAT detection
  93. GRB 150513A: Fermi GBM detection
  94. GRB 150513A: Fermi-LAT detection
  95. GRB 150512A: Fermi GBM detection
  96. GRB 150513A: Swift detection of a burst
  97. GRB 150512A: iPTF Optical Observations
  98. Konus-Wind observation of GRB 150510A
  99. GRB 150510A: Fermi-LAT Refined Analysis
  100. GRB 150510A: Fermi-LAT detection

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