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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"

23624 results found.

  1. GRB 100728B, Swift-BAT refined analysis
  2. Konus-Wind observation of GRB 100728A
  3. GRB 100728A: GROND Detection of the NIR Afterglow Candidate
  4. GRB 100728A, Swift-BAT refined analysis
  5. GRB 100728B: GROND Detection of the NIR Afterglow
  6. GRB 100728B: optical detection
  7. GRB 100728B: Skynet/PROMPT Detections (correction)
  8. GRB 100728B: Swift detection of a burst with an optical counterpart
  9. GRB 100728A: Skynet/PROMPT Detections
  10. GRB 100728A: Swift detection of a burst
  11. GRB 100727A, Swift-BAT refined analysis
  12. GRB 100727A: Swift detection of a burst
  13. GRB100725B: MITSuME optical upper limits
  14. GRB 100724B: AGILE/GRID analysis
  15. GRB 100724B: Suzaku WAM observation of the prompt emission
  16. GRB 100724B: gamma-ray detection by AGILE
  17. GRB 100725B: Swift-BAT refined analysis
  18. GRB 100725A: Swift-BAT refined analysis
  19. GRB 100725B: Swift detection of a burst
  20. GRB100725A Faulkes Telescope South observations
  21. Konus-Wind observation of GRB 100724B
  22. GRB 100725A: Swift detection of a burst
  23. GRB 100724B: Fermi GBM detection
  24. GRB 100724A: Swift-BAT refined analysis
  25. GRB 100724A: Swift detection of a burst
  26. GRB 100614A: 10.4-m GTC deep-optical limit
  27. GRB 100718A: MASTER-Net optical prompt and alert observations
  28. GRB 100719A: Swift-BAT refined analysis
  29. GRB 100719A: Swift detection of a burst
  30. GRB 100713A: optical observation in Maidanak
  31. GRB 100713A: further inspection of TNG images
  32. GRB 100713A : IRSF/SIRIUS NIR upper limits
  33. GRB100713A: Swift/UVOT observations
  34. GRB 100713A: GROND upper limits
  35. GRB 100713A: TNG optical observations
  36. GRB 100713A: TELMA and 1.5m OSN optical observations
  37. GRB100713A: Swift X-ray afterglow detection
  38. GRB 100713A: a long GRB detected by INTEGRAL
  39. GRB 100707A: Suzaku WAM observation of the prompt emission
  40. Konus-Wind observation of GRB 100707A
  41. IPN triangulation of GRB 100707A
  42. GRB 100628A: Keck/LRIS Spectroscopy of Host Galaxy Candidate
  43. GRB 100707A: Fermi GBM detection
  44. Konus-Wind observation of GRB 100701B
  45. IPN triangulation of GRB 100701B
  46. Konus-Wind observation of GRB 100704A
  47. GRB 100703A: a short GRB detected by INTEGRAL
  48. GRB 100704A: Fermi GBM observation
  49. GRB 100704A: Swift-BAT refined analysis
  50. GRB 100704A: Swift detection of a burst
  51. GRB 100702A, Swift-BAT refined analysis
  52. GRB 100702A: Swift XRT refined analysis
  53. Swift/UVOT observations of GRB100702A - correction
  54. Swift/UVOT observations of GRB100702A
  55. GRB 100702A: Second epoch of Magellan near-IR observations and afterglow limits
  56. GRB 100701B: Fermi GBM detection
  57. GRB 100702A: Magellan near-IR observations
  58. GRB 100702: ROTSE-III Optical Limits
  59. GRB 100702A: Swift detection of a short burst
  60. GRB 100615A: Chandra X-ray ToO Observation
  61. XRF 100701A : MAXI/GSC detection of a probable XRF
  62. GRB 100628A: Second epoch of Magellan near-IR observations
  63. GRB 100628A: GROND optical/NIR observations of the host candidate
  64. GRB100625A: GROND confirmation of constant source
  65. GRB 100628A: Magellan near-IR observations
  66. GRB100628A: RTT150 optical observations
  67. GRB 100628A: INTEGRAL SPI-ACS light curve
  68. GRB 100625A: Magellan near-IR Observations
  69. GRB 100628A: Swift-BAT refined analysis
  70. GRB 100628A: Swift detection of a short hard burst
  71. Swift-BAT trigger 426048 is not a burst
  72. GRB 100625A: Swift-BAT refined analysis
  73. Konus-Wind observation of GRB 100625A
  74. GRB 100625A : IRSF/SIRIUS NIR upper limit
  75. GRB 100625A: Swift detection of a short hard burst
  76. Konus-Wind observation of GRB 100621A
  77. GRB 100621A: IRSF/SIRIUS NIR Observation
  78. GRB 100621A MOA-II optical limit
  79. GRB 100621A: VLT/X-shooter redshift
  80. GRB 100621A: Swift-BAT refined analysis
  81. GRB 100621A: GROND observation of bright NIR afterglow
  82. GRB 100621A: Swift detection of a burst
  83. GRB 100606A: Optical Limits
  84. GRB 100619A: Swift-BAT refined analysis
  85. GRB 100619A: Swift detection of a burst
  86. GRB 100614A: Gemini/NIRI Observations
  87. GRB 100615A: Gemini/NIRI Observations
  88. XRF 100616a : MAXI/GSC detection of a probable XRF
  89. Fermi GBM trigger 100612038 is not a GRB
  90. GRB 100614A: MASTER-Net optical alert observations
  91. GRB 100614A: Swift-BAT refined analysis
  92. GRB 100615A: Fermi GBM detection
  93. GRB 100615A: Swift-BAT refined analysis
  94. GRB 100615A: GROND observations, upper limits
  95. GRB 100615A: NTT/Ultracam imaging
  96. GRB 100615A: Swift detection of a burst
  97. GRB 100614A: BOOTES-2/TELMA optical observations
  98. GRB 100614A: Liverpool Telescope Observations
  99. GRB 100614A: Swift detection of a burst
  100. GRB 100606A: Suzaku WAM observation of the prompt emission

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