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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"

27124 results found.

  1. GRB 070518, Swift-BAT refined analysis
  2. GRB 070518: Swift detection of a burst with optical afterglow
  3. GRB070517: Swift-XRT Refined Analysis
  4. GRB 070517, Swift-BAT refined analysis
  5. GRB 070517: Swift detection of a burst
  6. GRB 070509: Swift/UVOT Upper Limits
  7. Konus-Wind and Konus-A observation of GRB 070508
  8. Swift-BAT trigger 278987 is not a GRB
  9. GRB 070510: Swift detection of a possible burst
  10. GRB070509: Swift-XRT Refined Analysis
  11. GRB 070509, Swift-BAT refined analysis
  12. GRB 070508: Suzaku/WAM observation of the prompt emission
  13. GRB 070509: Swift detection of a burst
  14. GRB 070509: ROTSE-III Optical Limits
  15. GRB070508: Swift/UVOT Observations
  16. GRB 070508, Swift-BAT refined analysis
  17. GRB 070508: REM observations
  18. GRB 070508: TAROT La Silla observatory optical observations
  19. GRB 070508: Swift detection of an intense burst with an optical counterpart
  20. Swift-BAT trigger 278809 is not a GRB
  21. GRB 070507: Swift detection of a possible cosmic ray shower event or a possible burst
  22. GRB070506: Swift/UVOT Observations
  23. GRB070506: Swift XRT refined analysis
  24. GRB 070506, Swift-BAT Refined Analysis
  25. GRB 070506: Swift detection of a burst with optical afterglow
  26. GRB 070429A: Swift XRT further analysis
  27. GRB 070309: Swift-XRT afterglow confirmation
  28. Swift/UVOT observations of GRB070429B
  29. GRB 070429B, Swift-BAT refined analysis
  30. Swift/UVOT observations of GRB070429A
  31. GRB 070429A: Swift XRT refined analysis
  32. GRB 070429A, Swift-BAT refined analysis
  33. GRB 070429B: Swift XRT refined analysis
  34. GRB 070429B: ROTSE-III Optical Limits
  35. GRB 070429B: Swift detection of a short burst
  36. GRB 070429: ROTSE-III Optical Limits
  37. GRB 070429: Swift detection of a burst
  38. GRB 070427, Swift-BAT Refined Analysis
  39. GRB 070427: Swift detection of a burst
  40. GRB 070411: Late-time Keck imaging
  41. GRB070419B: Suzaku WAM observation of the prompt emission
  42. GRB 070420 Swift-BAT Refined Analysis
  43. GRB070419A: Kuiper Optical detection
  44. GRB070419a: Swift UVOT observations
  45. GRB 070419A: MARGE Observations
  46. GRB070420: Swift UVOT continuing observations
  47. GRB 070411: BART early limit
  48. GRB 070420: Faulkes Telescope South Observations
  49. GRB 070420: TAROT La Silla observatory optical observations
  50. GRB 070420: NIR and optical afterglow confirmed
  51. GRB 070420: Swift detection of a burst with optical afterglow
  52. GRB 070419A: Early Super-LOTIS Observations
  53. GRB 070419B, Swift-BAT refined analysis
  54. GRB 070419A Swift-BAT Refined Analysis
  55. GRB 070419A: RAPTOR Detection of Early Emission
  56. GRB 070419B: Swift XRT refined analysis
  57. GRB 070419A, Optical observations
  58. GRB070419 - SDSS Pre-Burst Observations
  59. GRB 070419A: SARA observations
  60. GRB 070419A: Faulkes Telescope North Optical Observations
  61. GRB070419A, optical observation
  62. Infrared detection of GRB070419A with UKIRT
  63. GRB 070419B: Swift detection of a burst
  64. GRB 070419A: ROTSE-III Optical Limits
  65. GRB 070419: Swift detection of a burst
  66. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  67. Trigger 276045: Swift detection of a possible burst
  68. GRB 070411: TLS data shows plateau, flares
  69. GRB070412: UKIRT-WFCAM JHK upper limits
  70. GRB070412: Swift UVOT observations
  71. IBAS Alert n.4199: Not a GRB
  72. GRB 070411: Swift/UVOT observations
  73. GRB 070412, Swift-BAT refined analysis
  74. GRB 070412 Liverpool Telescope optical limit
  75. GRB 070412: Swift-XRT refined analysis
  76. GRB 070411: Swift-XRT refined analysis
  77. GRB 070412: IAC80 optical afterglow candidate
  78. GRB 070412: NOT observations
  79. GRB 070411, Swift-BAT refined analysis
  80. GRB 070412: Swift detection of a burst
  81. GRB 070411: IAC80 optical observations
  82. GRB 070411 : Liverpool Telescope Observations
  83. GRB 070411: ROTSE-III Detection of Optical Counterpart
  84. GRB 070411: Tautenburg RRM Afterglow Confirmation
  85. GRB 070411: Swift detection of a burst with optical afterglow
  86. GRB 070406, Swift-BAT refined analysis
  87. GRB070406: Swift UVOT observations
  88. GRB 070406: further analysis of NOT images.
  89. GRB 070406: Swift XRT Team analysis - Possible X-ray counterpart
  90. GRB 070406: SARA upper limit
  91. GRB 070406: Swift detection of a burst
  92. GRB 070402: Suzaku WAM observation of the prompt emission
  93. GRB 070328: Suzaku WAM observation of the prompt emission
  94. UVOT observations of GRB070330
  95. GRB 070330, Swift-BAT refined analysis
  96. GRB 070330: TAROT La Silla observatory optical observations
  97. GRB 070330 - Watcher Observations
  98. GRB 070330: Swift detection of a burst
  99. Konus-Wind observation of GRB 070328
  100. GRB 070328: Swift/UVOT Upper Limits

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