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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"

19662 results found.

  1. GRB 100728B: KAIT optical afterglow detection (correction)
  2. GRB 100728B: Swift detection of a burst with an optical counterpart
  3. GRB 100728A: Skynet/PROMPT Detections
  4. GRB 100728A: Fermi GBM observation
  5. GRB 100728A: Enhanced Swift-XRT position
  6. GRB 100728A: Swift detection of a burst
  7. GRB 100727A: Swift XRT refined analysis
  8. GRB 100727A: Fermi GBM observation
  9. GRB 100727A, Swift-BAT refined analysis
  10. GRB 100727A: Enhanced Swift-XRT position
  11. GRB100727A: MOA optical upper limit
  12. GRB 100727A: Swift detection of a burst
  13. GRB 100725B: Swift-BAT refined analysis
  14. GRB 100725B: refined XRT analysis
  15. GRB 100725B: Swift/UVOT Upper Limits
  16. GRB 100725A: Swift/UVOT Upper Limits
  17. GRB 100725A: Swift-BAT refined analysis
  18. GRB 100725A: Swift XRT refined analysis
  19. GRB 100725B: Enhanced Swift-XRT position
  20. GRB 100725A: Enhanced Swift-XRT position
  21. GRB100725B: Faulkes Telescope North observations
  22. GRB 100725B: Swift detection of a burst
  23. GRB 100725A: Prompt enhanced Swift-XRT position
  24. GRB 100725A: Swift detection of a burst
  25. GRB 100724A: Swift/BAT spectral lag results
  26. GRB 100724A: Swift XRT refined analysis
  27. GRB 100724A: Enhanced Swift-XRT position
  28. GRB 100724A: Swift/UVOT observations
  29. GRB 100724A: Swift-BAT refined analysis
  30. GRB 100724A, GROND detection of an afterglow candidate
  31. GRB 100724A: Swift detection of a burst
  32. GRB 100614A: 10.4-m GTC deep-optical limit
  33. GRB 100719A: Swift-BAT refined analysis
  34. GRB 100719A: Swift detection of a burst
  35. GRB 100713A: Swift XRT refined analysis
  36. GRB 100713A : IRSF/SIRIUS NIR upper limits
  37. GRB100713A: Swift/UVOT observations
  38. GRB 100713A: GROND upper limits
  39. GRB 100713A: optical upper limit
  40. GRB 100713A: TELMA and 1.5m OSN optical observations
  41. GRB100713A: Swift X-ray afterglow detection
  42. GRB 100628A: Chandra observations
  43. GRB 100628A: Swift XRT/UVOT refined analysis
  44. Tentative redshift of GRB100704A from Swift-XRT data
  45. Konus-Wind observation of GRB 100704A
  46. GRB 100704A: Swift XRT refined analysis
  47. GRB 100704: Swift/UVOT Upper Limits
  48. GRB 100704A: Fermi GBM observation
  49. GRB 100704A: Swift-BAT refined analysis
  50. GRB100704A: MOA optical upper limit
  51. GRB 100704A: Enhanced Swift-XRT position
  52. GRB 100704A: Swift detection of a burst
  53. GRB 100702A, Swift-BAT refined analysis
  54. GRB 100702A: Swift XRT refined analysis
  55. Swift/UVOT observations of GRB100702A - correction
  56. Swift/UVOT observations of GRB100702A
  57. GRB 100702: ROTSE-III Optical Limits
  58. GRB 100702A: Swift detection of a short burst
  59. GRB 100615A: Chandra X-ray ToO Observation
  60. GRB 100213B: Detection of Fading Optical Afterglow
  61. GRB 100625A: Fermi GBM detection
  62. GRB 100628A: Swift XRT refined position
  63. GRB100625A: GROND confirmation of constant source
  64. GRB100628A : MOA optical upper limit
  65. GRB 100628A: Swift/UVOT Upper Limits
  66. GRB 100628A: Swift XRT detection of a possible X-ray afterglow
  67. GRB 100628A: INTEGRAL SPI-ACS light curve
  68. GRB 100628A: Swift-BAT refined analysis
  69. GRB 100628A: Swift detection of a short hard burst
  70. Swift-BAT trigger 426048 is not a burst
  71. GRB 100614A: CrAO optical limit
  72. GRB 100625A: Swift/UVOT Upper Limits
  73. GRB 100625A: Swift-BAT refined analysis
  74. Konus-Wind observation of GRB 100625A
  75. GRB 100625A : IRSF/SIRIUS NIR upper limit
  76. GRB 100625A: Swift-XRT Team refined analysis
  77. GRB 100625A: Enhanced Swift-XRT position
  78. GRB100625A : MOA optical upper limit
  79. GRB 100625A: Swift detection of a short hard burst
  80. GRB 100418A: late time optical observations
  81. Konus-Wind observation of GRB 100621A
  82. GRB 100621A: IRSF/SIRIUS NIR Observation
  83. GRB 100621A MOA-II optical limit
  84. GRB 100621A: Swift/UVOT observations
  85. GRB 100621A: Swift XRT refined analysis
  86. GRB 100621A: Swift-BAT refined analysis
  87. GRB 100621A: GROND observation of bright NIR afterglow
  88. GRB 100621A: Enhanced Swift-XRT position
  89. GRB 100621A: Prompt enhanced Swift-XRT position
  90. GRB 100621A: ROTSE-III Optical Limits
  91. GRB 100621A: Swift detection of a burst
  92. GRB 100606A: Optical Limits
  93. GRB 100619A: Fermi GBM detection
  94. GRB 100619A: Swift/UVOT Upper Limits
  95. GRB 100619A: Swift-XRT refind analysis
  96. GRB 100619A: Enhanced Swift-XRT position
  97. GRB 100619A: Swift-BAT refined analysis
  98. GRB 100619A: Swift detection of a burst
  99. GRB 100615A: Swift/UVOT Upper Limits
  100. GRB 100614A: Swift/UVOT Upper Limits

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