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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"

12170 results found.

  1. Konus-Wind observation of exceptionally bright GRB 140219A
  2. GRB 140221A: MAXI/GSC detection
  3. GRB 140219A: Fermi-LAT detection of a burst
  4. GRB 140215A: Continued Skynet PROMPT Observations of the Optical Afterglow
  5. Konus-Wind observation of GRB 140213A
  6. Konus-Wind observation of GRB 140215A
  7. GRB 140211A: Swift-XRT and UVOT observations
  8. GRB 140215A: Swift-XRT refined Analysis
  9. GRB 140215A: KAIT Optical Detection
  10. GRB 140213A: Swift-XRT observations
  11. Trigger 586482: Swift detection of GROJ1744-28
  12. Konus-Wind observation of GRB 140209A
  13. GRB 140211A: Swift detection of a burst
  14. Konus-Wind observation of GRB 140206B
  15. GRB 140206A: Swift-XRT refined Analysis
  16. GRB 140206A: Swift/UVOT Detection
  17. GRB 140206A: ISON-Ussuriysk optical observations
  18. GRB 140206B: Fermi-LAT detection
  19. GRB 140206B: Fermi GBM detection
  20. GRB140206A - Optical afterglow candidate
  21. GRB140206A: a long GRB detected by INTEGRAL
  22. GRB 140206A: Swift detection of a burst
  23. GRB 140129B: Swift/UVOT Detection
  24. GRB 140129B: Swift-XRT refined Analysis
  25. GRB 140129B: MASTER OT early light curve
  26. GRB 140129A: P200 spectroscopy
  27. GRB 140129A: Swift/UVOT Observations
  28. GRB 140129A: Swift-XRT refined Analysis
  29. GRB 140129B: MASTER OT confirmation
  30. GRB 140129B: Swift detection of a burst with an optical afterglow
  31. GRB 140129A: Swift detection of a burst with an optical afterglow
  32. GRB 140122A/Fermi412093190: MASTER-Net early optical observations
  33. Konus-Wind observation of GRB 131215A
  34. GRB 140118A, Swift-BAT refined analysis
  35. GRB 140114A: ROTSE-III Optical Limits
  36. GRB 140114A: Swift-XRT refined Analysis
  37. GRB 140114A: KAIT Optical Upper Limit
  38. GRB 140104B: Further Swift XRT observations
  39. GRB 140102A: AAO optical upper limits
  40. GRB 140114A: Swift detection of a burst
  41. GRB 140110A: Fermi-LAT detection of a burst
  42. GRB 140108A: Mondy optical upper limit
  43. GRB 140108A: Swift-BAT refined analysis
  44. GRB 140108A: D50+BART optical candidate detection
  45. GRB 140105A: HCT Observations
  46. GRB 140103A: Swift XRT afterglow confirmation
  47. GRB 140104B: Fermi-LAT detection of a burst
  48. GRB 131209A: Further Swift XRT observations
  49. GRB140104A : Xinglong TNT observation. A bright star is located nearby
  50. Konus-Wind observation of GRB 131231A
  51. Konus-Wind observation of GRB 140102A
  52. GRB 140102A: MAXI/GSC detection
  53. GRB 140102A: Swift-XRT refined Analysis
  54. GRB 140103A: MASTER-Net optical observations
  55. GRB 140102A: Fermi-LAT detection of a burst
  56. GRB 131231A: Swift-XRT observations
  57. GRB 131231A: Fermi-LAT detection of a burst
  58. Konus-Wind observation of GRB 131229A
  59. GRB 131229A: KAIT Optical Upper Limit
  60. Konus-Wind observation of GRB 131226A
  61. GRB 131227A: OT candidate from KAIT Optical observations
  62. GRB 131227A: Swift detection of a burst
  63. GRB 131225A: MAXI/GSC detection
  64. GRB 131224A: A short GRB detected by INTEGRAL
  65. GRB 131218A: a long GRB detected with INTEGRAL
  66. GRB 131216A: Fermi-LAT detection of a burst
  67. GRB 131215A: MAXI/GSC detection
  68. Konus-Wind observation of GRB 131209A
  69. GRB 131209A: Fermi-LAT detection of a burst
  70. Swift Trigger 580319 is not a GRB
  71. GRB 131205A: Swift detection of a burst
  72. GRB 131127B: Bassano Bresciano Observatory,archival confirmation of iPTF13ecv
  73. GRB 131127B: archival confirmation of iPTF13ecv as a CV
  74. GRB 131202A: Swift-XRT refined Analysis
  75. GRB 131202A: Bassano Bresciano Observatory optical upper limit
  76. GRB 131202A: Tautenburg observations
  77. GRB 131202A : XMM-Newton planned observation
  78. GRB 131202A: Swift detection of a burst
  79. Konus-Wind observation of GRB 131126A
  80. IPN Triangulation of GRB 131126A (short/hard)
  81. Konus-Wind observation of GRB 131125A
  82. GRB 131128A: Swift-XRT refined Analysis
  83. GRB 131128A: Swift detection of a burst
  84. Konus-Wind observation of GRB 131127B
  85. Fermi407254341: iPTF optical afterglow candidates
  86. GRB 131122A: a long GRB detected with INTEGRAL
  87. GRB 131120A, Swift-BAT refined analysis
  88. Konus-Wind observation of GRB 131118A
  89. Fermi Gamma-ray Burst Monitor trigger 406601061 / 131120031 is not a GRB
  90. GRB 131117A: Swift-XRT refined Analysis
  91. GRB 131117A: Swift detection of a burst
  92. GRB 130925A: HST imaging
  93. Konus-Wind observation of GRB 131108A
  94. GRB 131108A: AGILE/GRID observation
  95. GRB 131108A: Fermi GBM observation
  96. GRB 131108A: Swift-XRT observations
  97. GRB 131108A: Fermi-LAT refined analysis
  98. IPN triangulation of GRB 131108A
  99. GRB 131108A: Fermi-LAT onboard detection of a burst
  100. GRB 131029A: Suzaku WAM observation of the prompt emission

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