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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"

28937 results found.

  1. GRB 070520B: Swift/UVOT Upper Limits
  2. GRB 070521, Swift-BAT refined analysis
  3. GRB 070520A: Swift UVOT Upper Limits
  4. GRB 070520B: Swift-XRT refined analysis
  5. GRB 070521: optical limit by Pi of the Sky
  6. GRB070521 : Faulkes Telescope North Observations
  7. GRB 070521: TAROT La Silla observatory optical observations
  8. GRB070521 - SDSS Pre-Burst Observations
  9. GRB 070521: Swift detection of a burst
  10. GRB 070520A: MITSuME Akeno optical upper limits
  11. GRB 070520B, Swift-BAT refined analysis
  12. GRB 070520A, Swift-BAT refined analysis
  13. GRB 070520B: Swift detection of a burst
  14. GRB 070520: Swift detection of a burst
  15. GRB070518: UVOT refined analysis
  16. GRB 070518, Swift-BAT refined analysis
  17. GRB 070518: Swift detection of a burst with optical afterglow
  18. GRB070517: Swift-XRT Refined Analysis
  19. GRB 070517, Swift-BAT refined analysis
  20. GRB 070517: Swift detection of a burst
  21. GRB 070509: Swift/UVOT Upper Limits
  22. Konus-Wind and Konus-A observation of GRB 070508
  23. Swift-BAT trigger 278987 is not a GRB
  24. GRB 070510: Swift detection of a possible burst
  25. GRB070509: Swift-XRT Refined Analysis
  26. GRB 070509, Swift-BAT refined analysis
  27. GRB 070508: Suzaku/WAM observation of the prompt emission
  28. GRB 070509: Swift detection of a burst
  29. GRB 070509: ROTSE-III Optical Limits
  30. GRB070508: Swift/UVOT Observations
  31. GRB 070508, Swift-BAT refined analysis
  32. GRB 070508: REM observations
  33. GRB 070508: TAROT La Silla observatory optical observations
  34. GRB 070508: Swift detection of an intense burst with an optical counterpart
  35. Swift-BAT trigger 278809 is not a GRB
  36. GRB 070507: Swift detection of a possible cosmic ray shower event or a possible burst
  37. GRB070506: Swift/UVOT Observations
  38. GRB070506: Swift XRT refined analysis
  39. GRB 070506, Swift-BAT Refined Analysis
  40. GRB 070506: Swift detection of a burst with optical afterglow
  41. GRB 070429A: Swift XRT further analysis
  42. GRB 070309: Swift-XRT afterglow confirmation
  43. Swift/UVOT observations of GRB070429B
  44. GRB 070429B, Swift-BAT refined analysis
  45. Swift/UVOT observations of GRB070429A
  46. GRB 070429A: Swift XRT refined analysis
  47. GRB 070429A, Swift-BAT refined analysis
  48. GRB 070429B: Swift XRT refined analysis
  49. GRB 070429B: ROTSE-III Optical Limits
  50. GRB 070429B: Swift detection of a short burst
  51. GRB 070429: ROTSE-III Optical Limits
  52. GRB 070429: Swift detection of a burst
  53. GRB 070427, Swift-BAT Refined Analysis
  54. GRB 070427: Swift detection of a burst
  55. GRB 070411: Late-time Keck imaging
  56. GRB070419B: Suzaku WAM observation of the prompt emission
  57. GRB 070420 Swift-BAT Refined Analysis
  58. GRB070419A: Kuiper Optical detection
  59. GRB070419a: Swift UVOT observations
  60. GRB 070419A: MARGE Observations
  61. GRB070420: Swift UVOT continuing observations
  62. GRB 070411: BART early limit
  63. GRB 070420: Faulkes Telescope South Observations
  64. GRB 070420: TAROT La Silla observatory optical observations
  65. GRB 070420: NIR and optical afterglow confirmed
  66. GRB 070420: Swift detection of a burst with optical afterglow
  67. GRB 070419A: Early Super-LOTIS Observations
  68. GRB 070419B, Swift-BAT refined analysis
  69. GRB 070419A Swift-BAT Refined Analysis
  70. GRB 070419A: RAPTOR Detection of Early Emission
  71. GRB 070419B: Swift XRT refined analysis
  72. GRB 070419A, Optical observations
  73. GRB070419 - SDSS Pre-Burst Observations
  74. GRB 070419A: SARA observations
  75. GRB 070419A: Faulkes Telescope North Optical Observations
  76. GRB070419A, optical observation
  77. Infrared detection of GRB070419A with UKIRT
  78. GRB 070419B: Swift detection of a burst
  79. GRB 070419A: ROTSE-III Optical Limits
  80. GRB 070419: Swift detection of a burst
  81. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  82. Trigger 276045: Swift detection of a possible burst
  83. GRB 070411: TLS data shows plateau, flares
  84. GRB070412: UKIRT-WFCAM JHK upper limits
  85. GRB070412: Swift UVOT observations
  86. IBAS Alert n.4199: Not a GRB
  87. GRB 070411: Swift/UVOT observations
  88. GRB 070412, Swift-BAT refined analysis
  89. GRB 070412 Liverpool Telescope optical limit
  90. GRB 070412: Swift-XRT refined analysis
  91. GRB 070411: Swift-XRT refined analysis
  92. GRB 070412: IAC80 optical afterglow candidate
  93. GRB 070412: NOT observations
  94. GRB 070411, Swift-BAT refined analysis
  95. GRB 070412: Swift detection of a burst
  96. GRB 070411: IAC80 optical observations
  97. GRB 070411 : Liverpool Telescope Observations
  98. GRB 070411: ROTSE-III Detection of Optical Counterpart
  99. GRB 070411: Tautenburg RRM Afterglow Confirmation
  100. GRB 070411: Swift detection of a burst with optical afterglow

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