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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

"200205A/SWIFT J0840.7-3516" does not adhere to advanced search syntax. Please refer to the documentation and try again.
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"

19596 results found.

  1. GRB 100219A: GROND observations
  2. GRB 100219A: Enhanced Swift-XRT position
  3. GRB 100219A: Swift/UVOT Detection of the Optical Afterglow
  4. GRB 100216A: XRT Refined Analysis
  5. GRB 100219A: Swift-BAT refined analysis
  6. GRB 100219A: Swift/UVOT Detection of a Source near the XRT Position
  7. GRB 100219A: Swift detection of a burst
  8. GRB 100216A Short, hard GRB detected in ground analysis of Swift-BAT data
  9. GRB 100213A: Swift-BAT lag analysis indicates probably SHB
  10. GRB 100213B: GRT Optical Observation
  11. GRB 100213A: GRT Optical Observation
  12. GRB 100213A: Swift-BAT refined analysis
  13. GRB 100213B: Enhanced Swift-XRT position
  14. GRB 100213B: Swift/UVOT Upper Limits
  15. GRB 100213A: Swift/UVOT Upper Limits
  16. GRB 100213B: PAIRITEL NIR Upper Limits
  17. GRB 100213A: Enhanced Swift-XRT position
  18. GRB 100213B: Swift-BAT refined analysis
  19. GRB 100213B: Swift XRT refined analysis
  20. GRB 100213A: Swift XRT refined analysis
  21. GRB 100213B: Swift detection of a burst
  22. GRB 100213A: Swift detection of a burst
  23. Swift/UVOT observations of GRB100212A - correction of the name of the burst
  24. Swift/UVOT observations of GRB120212A
  25. GRB 100212A: Fermi GBM detection
  26. GRB 100212A: Swift XRT refined analysis
  27. GRB 100212A: Swift-BAT refined analysis
  28. GRB 100212A: Enhanced Swift-XRT position
  29. GRB 100212A: Swift detection of a burst
  30. GRB 100206A: GROND upper limits
  31. GRB 100206A: Swift/UVOT Upper Limits
  32. GRB 100206A: MASTER-Net optical alert observations
  33. GRB 100206A, RIMOTS optical upper limits
  34. GRB 100206A: optical observations from Southern Spain
  35. GRB 100205A: GROND upper limits
  36. GRB 100206A: Swift-XRT refined analysis
  37. GRB 100206A: Fermi GBM observation
  38. GRB 100206A: Swift-BAT refined analysis
  39. GRB 100206A: Enhanced Swift-XRT position
  40. GRB 100206A: Swift detection of a short hard burst
  41. GRB 100205A: Swift-BAT refined analysis
  42. GRB 100205A: Swift UVOT upper limits
  43. GRB 100205A: Swift XRT refined analysis
  44. GRB 100203A: Swift XRT and UVOT refined analyses
  45. GRB 100205A: Enhanced Swift-XRT position
  46. GRB 100205A: Swift detection of a burst
  47. GRB 100203A Detected in Ground Analysis of BAT Data
  48. GRB 100119A: Suzaku WAM observation of the prompt emission
  49. Konus-Wind observation of GRB 100119A
  50. GRB 100115A: Swift-XRT refined analysis
  51. GRB 100119A: Swift-BAT refined analysis
  52. GRB 100119A: Swift detection of a burst
  53. GRB 100117A: Fermi GBM detection
  54. Swift/UVOT refined analysis of GRB100117A
  55. GRB 100117A: Optical object inside the revised XRT error circle
  56. GRB 100117A: Swift-XRT refined analysis
  57. GRB 100117A: Swift-BAT refined analysis
  58. GRB 100117A: Swift detection of a short hard burst
  59. GRB 100115A: Enhanced Swift-XRT position
  60. GRB 100116A: Fermi LAT detection
  61. NOT observation of GRB100115A localization
  62. GRB 100115A: SARA Afterglow Candidate
  63. GRB 100115A: Swift/UVOT Upper Limits
  64. GRB 100115A: Swift-XRT candidate afterglow
  65. GRB 100115A detected in ground analysis of Swift-BAT data
  66. GRB 100111A: PAIRITEL NIR Upper Limits
  67. GRB 100111A: Swift UVOT Refined Analysis
  68. GRB 100111A: Swift-BAT refined analysis
  69. GRB 100111A: Enhanced Swift-XRT position
  70. GRB100111A: Swift-XRT refined analysis
  71. GRB 100111A: Fermi GBM observation
  72. GRB 100111A: Swift detection of a burst with an optical afterglow
  73. Swift/BAT Detects an Outburst from XTE J1901+014
  74. Swift Trigger #382159 is due to XTE J1752-223
  75. GRB 100103A: Swift-XRT team refined analysis
  76. GRB 100103A - UVOT-enhanced XRT position
  77. GRB 100103A: Swift/UVOT Upper Limits
  78. GRB 100103A: Correction to Swift position error
  79. GRB 100103A: Swift/XRT position
  80. Swift Trigger 381591: Retraction of Reported UVOT Source
  81. Swift Trigger 381591 is probably not a burst
  82. Swift Trigger 381591: Uncatalogued UVOT Source
  83. GRB 091230: Swift/UVOT Observations
  84. Trigger 381591: Swift detection of a possible burst
  85. GRB 091230: Swift-XRT observation
  86. Swift Trigger 381434 is not a GRB
  87. Trigger 381434: Swift detection of a possible burst
  88. GRB 091221 : IRSF NIR upper limit
  89. GRB 091221: Skynet/PROMPT Detections
  90. GRB 091221: Fermi GBM Observation
  91. GRB 091117: Swift-XRT late time observations
  92. GRB 091221 Swift-BAT refined analysis
  93. GRB091221: Swift/UVOT refined analysis, correction.
  94. GRB 091221: Swift/UVOT refined analysis
  95. GRB 091221: Swift-XRT refined analysis
  96. GRB 091221: Enhanced Swift-XRT position
  97. GRB 091221: UVOT Confirmation of an Optical Afterglow
  98. GRB 091221: ROTSE-III Detection of Optical Counterpart
  99. GRB 091221: Swift detection of a burst
  100. Swift trigger 379449 (possible GRB) is not a burst

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