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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"

3411 results found.

  1. Swift follow-up of an Integral weak transient
  2. GRB 140211A: Swift-XRT and UVOT observations
  3. GRB 140215A: Swift-XRT refined Analysis
  4. GRB 140213A: Swift/UVOT Observations
  5. GRB 140213A: Swift-XRT refined Analysis
  6. GRB140209A: Swift/UVOT observations.
  7. GRB 140209A: Swift-XRT observations
  8. GRB 140206A: Swift-XRT refined Analysis
  9. GRB 140129B: Swift-XRT refined Analysis
  10. GRB 140129A: Swift-XRT refined Analysis
  11. GRB 140110A: Second Follow-up Swift-XRT Observation
  12. GRB 140110A: Further Swift-XRT Observation
  13. GRB 140114A: Swift-XRT refined Analysis
  14. GRB 140104B: Further Swift XRT observations
  15. GRB 140110A: Swift/UVOT Observations
  16. GRB 140110A: Swift XRT observations
  17. GRB 140108A: Swift-XRT refined Analysis
  18. Swift-BAT triggered on KS 1947+300
  19. GRB 140103A: Swift XRT afterglow confirmation
  20. GRB 131231A: Swift/UVOT Observations of the Optical Afterglow
  21. GRB 140103A: Swift-XRT refined analysis
  22. GRB 140102A: Swift-XRT refined Analysis
  23. GRB 131231A: Swift-XRT observations
  24. GRB 131229A: Swift-XRT refined Analysis
  25. GRB 131227A: Swift-XRT refined Analysis
  26. GRB 131224A: Swift-XRT observation
  27. GRB 131209A: Swift XRT and UVOT observations
  28. GRB 131205A: Swift-XRT refined Analysis
  29. GRB 131127B: rejection of optical counterpart candidates
  30. GRB 131202A: Swift-XRT refined Analysis
  31. GRB 131122A: Swift-XRT Further Observation
  32. GRB 131128A: Swift-XRT refined Analysis
  33. GRB 131127A: Swift-XRT refined Analysis
  34. GRB 131122A: Swift-XRT observations
  35. GRB 131117A: Swift-XRT refined Analysis
  36. GRB 131110A: Swift-XRT and UVOT upper limits
  37. GRB 131108A: Swift-XRT observations
  38. GRB 131108A: Fermi-LAT refined analysis
  39. GRB 131108A: Swift detection of a possible X-ray afterglow
  40. GRB 131031A: Swift-XRT afterglow confirmation
  41. GRB 131105A: Swift-XRT refined Analysis
  42. GRB 131103A: Swift-XRT refined Analysis
  43. GRB 131018B: Further Swift-XRT observations.
  44. GRB 131031A: Swift-XRT observations
  45. GRB 131030A: Swift-XRT refined Analysis
  46. Swift Trigger 575905/possible GRB 131026A: Swift-XRT observations
  47. GRB 131024B: Swift-XRT refined Analysis
  48. GRB 131024A: Swift-XRT refined Analysis
  49. GRB 131018B: Swift/UVOT Upper Limits
  50. GRB 131018B: Swift-XRT observations
  51. GRB 131018A: Swift-XRT refined Analysis
  52. GRB 131014A: Swift-XRT refined Analysis
  53. GRB 131011A: Swift/UVOT Upper Limits
  54. GRB 131014A: Swift/UVOT Upper Limits
  55. GRB 131014A: Enhanced XRT position
  56. Swift-XRT detection of iPTF 13dsw/Fermi403206457
  57. GRB 131004A: MOSFIRE NIR imaging
  58. GRB 131004A: Swift-XRT refined Analysis
  59. GRB 131002B: Swift-XRT Refined Analysis
  60. GRB 131002A: Swift-XRT refined Analysis
  61. GRB 130925A: continuing Swift/XRT monitoring
  62. GRB 130929A: Swift-XRT refined Analysis
  63. GRB 130925A: Swift/UVOT Detection of the Host Galaxy
  64. GRB 130925A: Historical non-detection from Rosat-HRI
  65. GRB 130925A: Swift-XRT refined Analysis
  66. GRB 130903A: Further Swift XRT observations.
  67. GRB 130606A: Chandra observation
  68. GRB 130912A: Swift-XRT refined Analysis
  69. GRB 120419A: Swift XRT confirmation of the afterglow
  70. GRB 130907A: Swift-XRT refined Analysis
  71. GRB 120916A: Fermi-LAT detection of a burst
  72. Swift follow-up results of the possible weak INTEGRAL GRB
  73. GRB 130903A: Swift/UVOT Upper Limits
  74. Swift follow-up of an INTEGRAL possible weak GRB
  75. GRB 130903A: Swift-XRT observations
  76. Swift trigger 569022 is a new Galactic source Swift J1734.5-3027
  77. GRB 130831B: Swift-XRT refined Analysis
  78. GRB 130831A: Swift-XRT refined Analysis
  79. GRB 130828A: Swift XRT and UVOT observations
  80. GRB 130821A: Swift-XRT observation
  81. GRB 130822A: Swift-XRT refined Analysis
  82. GRB 130816A: Swift-XRT refined Analysis
  83. GRB 130816B: Swift-XRT refined Analysis
  84. GRB 130812A: Swift-XRT refined Analysis
  85. GRB 130807A: Swift-XRT refined analysis
  86. GRB 130623A: GROND detection of the optical/NIR afterglow
  87. GRB 130806A: Swift-XRT refined Analysis
  88. GRB 130803A: Swift-XRT refined Analysis
  89. GRB 130727A: Swift-XRT refined Analysis
  90. GRB 130725A: Swift-XRT refined Analysis
  91. GRB 130725B: Swift-XRT refined Analysis
  92. Swift Trigger 563980 is GRB 130725A
  93. GRB 130722A: Swift-XRT refined Analysis
  94. GRB 130702A: further Swift-XRT observations
  95. Fermi GRB 130702A: Swift XRT and UVOT observations
  96. Fermi394416326: iPTF detection of a possible optical afterglow
  97. GRB 130627B: Swift afterglow confirmation
  98. GRB 130623A: Second Swift-XRT observation
  99. GRB 130701A: Swift-XRT refined Analysis
  100. GRB 130627A: Swift-XRT refined Analysis

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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