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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"

19606 results found.

  1. GRB 090814A: Swift-XRT Team Refined Analysis
  2. GRB 090814A, RIMOTS optical upper limits
  3. GRB 090814A: Swift-BAT refined analysis
  4. GRB 090814: Enhanced Swift-XRT position
  5. GRB 090814: GROND Detection of an Optical Afterglow Candidate
  6. GRB 090814: Swift detection of a burst
  7. GRB 090813: Fermi GBM observation
  8. GRB 090813: Swift-XRT refined analysis
  9. GRB 090813, Swift-BAT refined analysis
  10. Konus-Wind observations of GRB090813
  11. GRB090813: Swift/UVOT upper limits
  12. GRB 090813: Enhanced Swift-XRT position
  13. GRB 090813: Liverpool Telescope afterglow confirmation
  14. GRB 090813: Swift detection of a burst
  15. GRB 090812: WIRO NIR upper limit
  16. GRB 090812: Faulkes Telescope South Continued Optical Monitoring
  17. GRB 090812: RAPTOR detections during the burst
  18. GRB 090812: Swift XRT refined analysis
  19. GRB 090812, RIMOTS optical upper limits
  20. GRB 090812 Swift-BAT Refined Analysis
  21. GRB090812: Swift/UVOT observations
  22. GRB 090812: GROND Observations of the Optical/NIR Afterglow
  23. GRB 090812: Enhanced Swift-XRT position
  24. GRB 090812: Liverpool Telescope afterglow confirmation
  25. GRB 090812: Swift detection of a burst with an optical counterpart
  26. GRB 090809: Swift-XRT refined analysis
  27. GRB090809: Swift/UVOT observations
  28. GRB 090809: Enhanced Swift-XRT position
  29. GRB 090809: Swift-BAT refined analysis
  30. GRB 090809: Swift detection of a burst with a possible optical counterpart
  31. GRB 090807: Liverpool Telescope observations
  32. GRB 090807: Swift/UVOT Upper Limits
  33. GRB 090807: Swift-XRT refined analysis
  34. GRB 090807, Swift-BAT refined analysis
  35. GRB 090807: Enhanced Swift-XRT position
  36. GRB 090807, RIMOTS optical upper limits
  37. GRB 090807: Swift detection of a burst
  38. GRB 090726: optical observation
  39. Swift-BAT trigger 358760 is most likely not a GRB
  40. Swift trigger 358760 is probably a noise event
  41. GRB 090709A : Quick look analysis of the Suzaku observation
  42. GRB 090728: Swift-BAT refined analysis
  43. GRB 090727: GRT Optical Observation
  44. GRB 090728: Swift XRT refined analysis
  45. GRB 090726: GRT Optical Observation
  46. GRB 090727: Swift/UVOT Upper Limits
  47. GRB 090728: Swift/UVOT Upper Limits
  48. GRB 090728: Enhanced Swift-XRT position
  49. GRB 090728, RIMOTS optical upper limits
  50. GRB 090728A: Faulkes Telescope North Optical Afterglow Candidate
  51. GRB 090728: Swift detection of a burst
  52. GRB 090727: Swift-BAT refined analysis
  53. GRB 090727: Swift-XRT refined analysis
  54. GRB 090727: Liverpool Telescope Afterglow Confirmation and Optical Flare
  55. GRB 090727: Enhanced Swift-XRT position
  56. GRB 090727: Liverpool Telescope possible OT candidate
  57. GRB 090727: Swift detection of a burst
  58. GRB090726: Swift/UVOT observations
  59. GRB 090726, Swift-BAT refined analysis
  60. GRB 090726: Afterglow candidate photometryfrom Crni Vrh
  61. GRB 090726: D50 optical observations
  62. GRB 090726: Swift-XRT Team refined analysis
  63. GRB 090726: Enhanced Swift-XRT position
  64. GRB 090726: Swift/UVOT Finding Chart Observation
  65. GRB 090726: Swift-XRT position of probable counterpart
  66. GRB 090726: Swift detection of a burst
  67. Swift Trigger 358354 is not a GRB
  68. GRB 090720: Gemini-North Imaging and Optical Afterglow
  69. Swift XRT and UVOT refned analysis of GRB 090720
  70. GRB 090709A: Swift XRT Timing Analysis
  71. GRB 090715B: VLA radio detection
  72. GRB 090720 Source found in ground processing of Swift-BAT data
  73. GRB 090715A: Suzaku WAM observation of the prompt emission
  74. GRB 090709A - CARMA mm Observations
  75. Konus-Wind observations of short/hard GRB 090715A
  76. GRB 090715B: MASTER optical limit
  77. GRB 090715A: Swift-BAT refined analysis
  78. GRB 090715B: Swift/UVOT followup observations
  79. GRB 090715B: break in the optical afterglow decay
  80. GRB 090715B: Enhanced Swift-XRT position
  81. GRB 090715B: Swift XRT Refined Analysis
  82. GRB 090715B: Swift-BAT refined analysis
  83. GRB 090715B - Liverpool Telescope Optical Afterglow Candidate
  84. Swift problem fixed
  85. GRB 090715B: Swift detection of a burst with a possible optical counterpart
  86. GRB 090715A: ROTSE-III Optical Limits
  87. GRB 090715: Swift detection of a short hard burst
  88. Swift satellite anomaly
  89. GRB 090712: Fermi GBM observation
  90. GRB 090712: Swift-BAT refined analysis
  91. GRB 090712: Swift detection of a burst
  92. GRB 090621B: MTM-500 optical observations
  93. GRB 090709A: deep optical observation with the 10.4m GTC
  94. GRB 090709A: Suzaku WAM observation of the prompt emission
  95. GRB 090709A: Swift UVOT upper limits
  96. GRB 090709B: Fermi GBM detection
  97. GRB 090709A: confirmation of the periodicity in the SPI-ACS data
  98. GRB 090709A: evidence for a very red afterglow at low z
  99. GRB 090709A: RAPTOR Limits During Gamma-Ray Emission
  100. GRB 090709A: Swift XRT Refined Analysis

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