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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"

19608 results found.

  1. GRB 090404: millimeter detection
  2. GRB 090404: nIR observations at Calar Alto
  3. Swift/UVOT observations of GRB090404
  4. GRB 090404: optical observations at BOOTES-3 and 1.5-m OSN
  5. GRB 090404: Swift-XRT Team refined analysis
  6. GRB 090404: Swift-BAT refined analysis
  7. GRB 090404: Enhanced Swift-XRT position
  8. GRB 090404: Swift detection of a burst
  9. GRB 090401A: Suzaku WAM observation of the prompt emission
  10. GRB 090401B: Suzaku WAM observation of the prompt emission
  11. Konus-Wind observation of GRB 090401B
  12. GRB 090401B: VLA radio upper limit
  13. GRB090401B, RIMOTS optical upper limits
  14. Swift/UVOT observations of GRB090401B
  15. Swift/UVOT observations of GRB090401B
  16. GRB 090401B: Swift XRT Refined Analysis
  17. Konus-Wind observation of GRB 090401A
  18. GRB 090401B: Enhanced Swift-XRT position
  19. GRB 090401B: Swift-BAT refined analysis
  20. Swift/UVOT detection of GRB090401B
  21. GRB 090401B: Swift detection of a burst
  22. GRB 090401, Swift-BAT refined analysis
  23. GRB 090401: Swift detection of a burst
  24. GRB 090328: Swift XRT refined analysis
  25. GRB 090328: Swift UVOT observations
  26. GRB 090328: Updated position/optical afterglow candidate
  27. GRB 090328: Possible Swift/XRT detection
  28. Fermi LAT and GBM detections of GRB090328
  29. GRB 090323: UVOT Detection of Afterglow
  30. GRB 090323: Swift-XRT refined analysis
  31. GRB 090323: GROND Detection of the Afterglow and Photo-z
  32. GRB 090323: Possible XRT Counterpart
  33. IPN Triangulation of GRB090315 and Tupi Detection of Muon Increase
  34. Further Swift/UVOT observations of GRB 090313
  35. GRB 090313: detection with CARMA in 3mm band
  36. GRB 090313: TAROT La Silla observatory optical detection
  37. GRB 090313: Zadko Telescope observations
  38. GRB 090313 - PAIRITEL NIR detections
  39. GRB 090313: Swift-XRT refined analysis
  40. GRB 090313: Swift/UVOT upper limits
  41. GRB 090313: Faulkes Telescope North observations
  42. GRB 090306B: Confirmation of the X-ray afterglow
  43. GRB 090313: Swift-BAT refined analysis
  44. GRB 090313, GROND observations
  45. GRB 090309, Swift-BAT lag analysis
  46. GRB 090313: Swift detection of a burst
  47. GRB 090313: Swift detection of a burst
  48. Swift trigger 346250 is probably not a burst
  49. GRB 090309A: GROND upper limits
  50. GRB 090307A: TAROT Calern observatory optical observations
  51. GRB 090309: Swift/UVOT Upper Limits
  52. GRB 090309: Swift-XRT refined analysis
  53. GRB 090309: Enhanced Swift-XRT position
  54. GRB 090306B: INTEGRAL SPI-ACS light curve
  55. GRB 090309, Swift-BAT refined analysis
  56. GRB 090308: GROND observations
  57. GRB 090308: Gemini GMOS Observations
  58. GRB 090309: Swift detection of a burst
  59. GRB 090308: Swift/UVOT Upper Limits
  60. GRB 090307: GROND Upper Limits
  61. GRB 090306B: GROND Upper Limits
  62. GRB 090305C: Suzaku WAM observation of the prompt emission
  63. GRB 090308: Swift-XRT refined analysis
  64. Radio observation of GRB 081007 with ATCA
  65. ATCA observation of SGR J1550-5418
  66. GRB 090308: Swift-BAT refined analysis
  67. GRB 090308: Swift detection of a burst
  68. GRB 090306B: Possible XRT afterglow
  69. GRB 090307: Swift-XRT afterglow confirmation and analysis
  70. GRB 090307: Swift-BAT refined analysis of trigger 345551
  71. GRB 090306B: Burst detection from Swift-BAT slew data
  72. Swift Trigger 345551 is probably not a GRB
  73. Swift-BAT trigger 345396 is not a GRB
  74. IPN localization of short GRB 090305C
  75. GRB 090306: Swift detection of a possible burst
  76. GRB 090305: Swift/UVOT Upper Limits
  77. GRB 090305: Swift-XRT refined analysis
  78. GRB 090305, Swift-BAT refined analysis
  79. GRB 090305: Swift detection of a short burst
  80. GRB 090301A: Suzaku WAM observation of the prompt emission
  81. Konus-Wind observation of GRB 090301A
  82. GRB 090301A: Swift-BAT refined analysis
  83. GRB 090301: Swift detection of a burst
  84. Swift_BAT_Lightcurve Notice for Trigger Number 344565 is not valid
  85. SGR J1550-5418
  86. GRB 081211B: Nearby cluster
  87. Swift Restored
  88. Swift Trigger 343319 is not a GRB
  89. GRB090217: XRT analysis
  90. SGR activity seen by BAT during ICSP Ionospheric Events
  91. GRB 090129: Fermi GBM detection
  92. GRB 090205: Swift/UVOT Upper Limits
  93. GRB 090205: Swift-XRT refined analysis
  94. GRB 090205: Swift burst of interest
  95. GRB 090205: GROND observations and photometric redshift estimate
  96. GRB 090205: Swift-BAT refined analysis
  97. GRB 090205: Enhanced Swift-XRT position
  98. GRB 090205: Swift detection of a burst
  99. GRB 090126A: Swift-XRT afterglow confirmation
  100. Konus-Wind observation of GRB 090201

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