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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"

19666 results found.

  1. GRB 131231A: Swift-XRT observations
  2. GRB 131231A: Fermi-LAT detection of a burst
  3. Konus-Wind observation of GRB 131229A
  4. GRB 131229A: GROND observations
  5. GRB 131229A: Swift-BAT refined analysis
  6. GRB 131229A: Swift-XRT refined Analysis
  7. GRB 131229A: Swift/UVOT Upper Limits
  8. GRB 131227A: GROND Upper Limits
  9. GRB 131229A: Enhanced Swift-XRT position
  10. GRB 131229A: KAIT Optical Upper Limit
  11. GRB 131229A: Swift detection of a burst
  12. GRB 131227A: P60 Limits
  13. GRB 131227A: Gemini-North Redshift
  14. GRB 131227A: Swift-XRT refined Analysis
  15. GRB 131227A: Swift/UVOT Upper Limits
  16. GRB 131227A: Swift-BAT refined analysis
  17. Konus-Wind observation of GRB 131226A
  18. GRB 131227A: Enhanced Swift-XRT position
  19. GRB 131227A: Swift detection of a burst
  20. GRB 131224A: Swift/UVOT Upper Limits
  21. GRB 131226A, Swift-BAT refined analysis
  22. GRB 131226A: Swift detection of a burst
  23. GRB 131216A: Suzaku WAM observation of the prompt emission
  24. GRB 131224A: Swift-XRT observation
  25. GRB 131218A: Swift XRT and UVOT observations
  26. IPN Triangulation of GRB 131216A
  27. Trigger 581129: Swift-BAT triggered on noise
  28. GRB 131209A: Swift XRT and UVOT observations
  29. GRB 131209A Tiled Swift observations
  30. IPN Triangulation of GRB 131209A
  31. GRB131202A : GROND observations
  32. GRB 131205A: Swift-BAT refined analysis
  33. GRB 131205A: Swift-XRT refined Analysis
  34. Swift Trigger 580319 is not a GRB
  35. GRB 131205A: Swift/UVOT Upper Limits
  36. GRB 131205A: Enhanced Swift-XRT position
  37. GRB 131205A: Zadko observatory - Gingin optical observations
  38. GRB 131205A: Swift detection of a burst
  39. GRB 131127B: rejection of optical counterpart candidates
  40. GRB 131127A: optically dark burst
  41. GRB 131202A, Swift-BAT refined analysis
  42. GRB 131202A: Swift/UVOT Upper Limits
  43. GRB 131202A: Swift-XRT refined Analysis
  44. GRB 131202A: RATIR Optical and NIR Observations
  45. GRB 131202A: Fermi GBM Detection
  46. GRB 131202A: Enhanced Swift-XRT position
  47. GRB 060614: theoretical derivation of the redshift and need for deeper search of the host galaxy
  48. GRB 131202A: Swift detection of a burst
  49. GRB 131122A: Swift-XRT Further Observation
  50. GRB 131128A: Bassano Bresciano Observatory optical upper limit
  51. GRB 131128A; Fermi GBM observation
  52. GRB 131128A: GROND observations of the afterglow
  53. GRB 131128A: Swift/UVOT Detection
  54. GRB 131128A: AROMA-N Optical Observation
  55. GRB 131128A: Swift-XRT refined Analysis
  56. GRB 131128A: Kanata/HOWPol optical observation
  57. GRB 131128A: T100 observations
  58. GRB 131128A: Swift-BAT refined analysis
  59. GRB 131128A: Enhanced Swift-XRT position
  60. GRB 131128A: Nanshan afterglow confirmation
  61. GRB 131128A: MASTER-Net optical observations
  62. GRB 131128A: Nanshan afterglow candidate
  63. GRB 131128A: Swift detection of a burst
  64. GRB 131127A: Bassano Bresciano Observatory optical upper limit
  65. GRB 131127A: Swift/UVOT Upper Limits
  66. GRB 131127A: AROMA-N Optical Observation
  67. GRB 131127A: RATIR Optical and NIR Observations, High-z Candidate
  68. Fermi407254341: iPTF optical afterglow candidates
  69. GRB 131127A: Swift-XRT refined Analysis
  70. GRB 131127A. 1.5m OSN optical limit
  71. GRB 131127A, Swift-BAT refined analysis
  72. GRB 131127A: Enhanced Swift-XRT position
  73. GRB 131127A: Mondy optical upper limit
  74. GRB 131127A: MASTER-NET optical observations
  75. GRB 131127A: Swift detection of a burst
  76. GRB 131122A: Swift/UVOT Upper Limits
  77. GRB 131122A: Upper limit from NOT imaging
  78. GRB 131122A: Swift-XRT observations
  79. GRB 131120A, Swift-BAT refined analysis
  80. IPN Triangulation of GRB 131118A
  81. GRB 131120A: Swift detection of a burst
  82. GRB 131118A: Fermi GBM detection
  83. GRB 131030A, Optical Observations
  84. GRB 131117A, Swift-BAT refined analysis
  85. GRB 131117A: TAROT La Silla observatory optical observations
  86. GRB 131117A: Swift/UVOT Detection
  87. GRB 131117A: Swift-XRT refined Analysis
  88. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  89. GRB 131117A: Enhanced Swift-XRT position
  90. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  91. GRB 131117A: Swift detection of a burst
  92. GRB 131110A: Swift-XRT and UVOT upper limits
  93. GRB 131110A BAT refined analysis
  94. GRB 131031A: Mondy optical observations
  95. GRB 131108A: optical observations
  96. GRB 131110A found in ground analysis of BAT slew event data
  97. GRB 131108A: Fermi GBM observation
  98. GRB 131108A: Swift/UVOT Detection
  99. GRB 131108A: Swift-XRT observations
  100. GRB 131108A: NOT optical observations

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