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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. GRB 140808A: Confirmation of the Swift-XRT afterglow
  2. Swift observations of possible GRB 140809A candidate
  3. GRB 140808A: Swift/UVOT Upper Limits
  4. GRB 140808A: Swift-XRT observations
  5. GRB140801A: Swift/XRT further observations
  6. GRB 140801A: Swift/UVOT Upper Limits
  7. GRB 140801A: Swift-XRT observations
  8. GRB 140730A: Swift-XRT refined Analysis
  9. GRB 140729A: Swift-XRT and UVOT observations
  10. GRB 140723A: Swift-XRT and UVOT observations
  11. GRB 140719B: Swift XRT observation
  12. GRB 140716A: Confirmation of the Swift-XRT afterglow
  13. GRB 140719A: Swift-XRT refined Analysis
  14. GRB 140716A: Swift-XRT detection of an afterglow candidate
  15. Swift observations of a flare from UX Ari
  16. GRB 140713A: Swift-XRT refined Analysis
  17. GRB 140710A: Swift-XRT refined Analysis
  18. GRB 140709B: Swift-XRT refined Analysis
  19. GRB 140709A: Swift-XRT refined Analysis
  20. GRB 140706A: Swift-XRT refined Analysis
  21. GRB 140705A: Swift-XRT refined Analysis
  22. GRB 140703A: Swift-XRT refined Analysis
  23. GRB 140629A: Nishi-Harima NIR Observations
  24. GRB 140629A: Swift-XRT refined Analysis
  25. GRB 140628A: Swift-XRT refined Analysis
  26. Swift Trigger 602668: XRT and UVOT confirm is not astrophysical source
  27. GRB 140623A: further Swift-XRT observations
  28. GRB 140626A: Swift-XRT refined Analysis
  29. Further Swift/XRT observations of GRB140620A/iPTFcva
  30. GRB 140623A: Swift-XRT and UVOT observations
  31. GRB 140621A: Swift-XRT observations
  32. GRB 140622A: Swift-XRT refined Analysis
  33. GRB 140620A: Swift/UVOT Detection
  34. GRB 140620A: Swift-XRT observations
  35. GRB 140619B: Swift-XRT observations
  36. GRB 140619A: Swift-XRT refined Analysis
  37. GRB 140606B: Swift XRT final light curve
  38. GRB 140614B: MOSFIRE Ks-band nondetection
  39. GRB 140614B: Swift-XRT refined Analysis
  40. GRB 140614B: Swift/UVOT Upper Limits
  41. GRB 140614A: Swift-XRT refined Analysis
  42. GRB 140611A: Swift-XRT observations
  43. GRB 140610A: Swift-XRT refined Analysis
  44. GRB 140606B / iPTF 14bfu: MOSFIRE NIR imaging
  45. GRB 140606B: Swift XRT refined analysis
  46. GRB 140606B: Swift/UVOT Upper Limits
  47. GRB 140606B: Swift XRT position
  48. GRB 140606A: Swift-XRT upper limits
  49. GRB 140523A: further Swift-XRT observations
  50. GRB 140529A: Swift-XRT afterglow detection.
  51. Chandra late-time observations of GRB140515A
  52. GRB 140523A: possible X-ray afterglow candidate from tiled Swift/XRT observations
  53. GRB 140516A: further Swift-XRT analysis
  54. GRB 140518A: Swift-XRT refined Analysis
  55. GRB 140516A: Swift-XRT refined Analysis
  56. GRB 140515A: Swift-XRT refined Analysis
  57. GRB 140515A: Swift/UVOT Upper Limits
  58. GRB 140512A: Continued UVOT Observations
  59. GRB 140512A: Swift-XRT refined Analysis
  60. Swift Observations of GRB 140508A
  61. GRB 140509A: Swift-XRT refined Analysis
  62. GRB 140508A: Swift-XRT observations
  63. GRB 140506A: Swift-XRT refined Analysis
  64. GRB 140502A: Swift-XRT refined Analysis
  65. GRB 140430A: Swift-XRT refined Analysis
  66. GRB 140423A: Nishi-Harima NIR Observations
  67. GRB 140423A: Swift-XRT refined Analysis
  68. GRB 140419A: Continued RATIR Optical and NIR Observations
  69. Konus-Wind observation of GRB 140419A
  70. GRB 140419A: Swift-XRT refined Analysis
  71. GRB 140414A: Swift/UVOT Upper Limit
  72. GRB 140414A: Swift-XRT observations
  73. GRB 140413A: Swift-XRT refined Analysis
  74. GRB 140412A: Swift-XRT refined Analysis
  75. Swift Trigger 595345 is not an astrophysical source
  76. GRB 140408A: Swift-XRT refined Analysis
  77. GRB 140402A: Swift-XRT observations
  78. Swift trigger 594286: Is likely a noise trigger
  79. GRB 140331A: Swift-XRT refined Analysis
  80. Retraction of the Fermi/LAT high-energy counterpart for GRB 140330A
  81. GRB 140323A: Swift-XRT refined Analysis
  82. GRB 140320C: Swift/UVOT Upper Limits
  83. GRB 140320C: Swift-XRT observations
  84. GRB 140320A: Confirmation of a fading X-ray afterglow
  85. GRB 140320C: Swift-XRT detection of the X-ray afterglow
  86. GRB 140320B: Swift-XRT detection of the afterglow
  87. GRB 140320A: Swift-XRT detection of an afterglow candidate
  88. Swift Trigger 592558 is not an astrophysical source
  89. GRB 140318A: Swift-XRT refined Analysis
  90. GRB 140311C: Swift-XRT and UVOT observations
  91. GRB 140311A: Swift-XRT refined Analysis
  92. GRB 140311B: Swift-XRT refined Analysis
  93. GRB 140304A: Swift-XRT refined Analysis
  94. GRB 140302A: Swift/UVOT Upper Limits
  95. GRB 140302A: Swift-XRT refined Analysis
  96. GRB 140301A: Swift-XRT refined Analysis
  97. iPTF14yb: Swift-XRT detection
  98. GRB 140219A: XRT afterglow candidate
  99. GRB 140221A: Results from Swift XRT tiled observations
  100. GRB 140219A: results from Swift XRT and UVOT tiled observations

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