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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"

36274 results found.

  1. GRB 120711B: Swift-BAT refined analysis
  2. GRB 120711B: Swift/UVOT Upper Limits
  3. GRB 120711A: Swift/UVOT Observations
  4. GRB 120709A: Swift/UVOT Observations
  5. Konus-Wind observation of GRB 120711A
  6. GRB 120711A: Fermi LAT detection
  7. GRB 120711A: MASTER early OT detection
  8. GRB 120711A: Swift-XRT observations
  9. GRB 120711A Gemini-S likely redshift
  10. Konus-Wind observation of GRB 120709A
  11. GRB 120711A: REM NIR early time detection
  12. GRB 120711A: GROND photometric redshift
  13. GRB 120711A: Fermi GBM observation
  14. GRB 120711A: MAXI/GSC detection
  15. GRB 120711A: a possible X-ray transient
  16. GRB 120711A: an bright long GRB detected with INTEGRAL
  17. Continued Skynet/PROMPT observations of GRB120711A
  18. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  19. Swift detection of GRB 120711B or a new Galactic transient
  20. GRB 120709A: Fermi GBM detection
  21. GRB 120709A: Swift-XRT observations
  22. GRB 120709A: Matched filter analysis of Fermi-LAT data
  23. GRB 120709A: optical afterglow limits
  24. Konus-Wind observation of GRB 120707A
  25. IPN Triangulation of GRB 120707A
  26. GRB 120709A: Fermi-LAT Detection
  27. GRB 120707A: Fermi GBM Detection of a Bright Burst
  28. GRB 120624B: mm detection at PdBI
  29. GRB 120703A: SMARTS optical/IR observations
  30. GRB 120703A: Swift/UVOT Detection
  31. GRB 120703A: Fermi GBM detection
  32. GRB 120703A: Swift-XRT refined Analysis
  33. GRB 120703A: Enhanced Swift-XRT position
  34. GRB 120703A: Swift-BAT refined analysis
  35. GRB 120624B Suzaku WAM observation of the prompt emission
  36. Konus-Wind observation of GRB 120703A
  37. GRB 120703A: NOT optical observation
  38. GRB 120701A: Swift/UVOT Detection
  39. GRB 120701A: GROND detection of the afterglow
  40. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  41. GRB 120701A: Swift-XRT afterglow detection and analysis
  42. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  43. GRB 120701A: Swift-BAT refined analysis
  44. GRB 120630A: NOT optical source within the XRT error circle
  45. Swift Trigger 525554 is probably not a GRB
  46. GRB120624B: Chandra observations and afterglow detection
  47. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  48. GRB 120624B Further Swift-XRT analysis
  49. GRB 120624B: Swift/UVOT Upper Limits
  50. GRB 120624B: Further analysis of the HAWKI observations
  51. GRB 120624B: Swift-XRT observations
  52. GRB 120624B: GROND upper limits
  53. GRB 120624B: NIR counterpart candidate from HAWKI
  54. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  55. GRB 120624B: NOT optical upper limit
  56. GRB 120624B: optical observations
  57. GRB 120624B, Swift-BAT refined analysis
  58. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  59. Konus-Wind observation of GRB 120624B
  60. GRB 120624B: Swift detection of a burst
  61. GRB 120624A: Fermi GBM observation
  62. GRB 120624B: Fermi-LAT Detection
  63. Konus-Wind observation of GRB 120624A
  64. GRB 120624B: Fermi GBM detection
  65. IPN Triangulation of GRB 120624A (short/intense)
  66. GRB 120622A: MAXI/GSC detection
  67. Swift trigger 524642 / SwJ1910.2-0546
  68. GRB 120602A: Suzaku WAM observation of the prompt emission
  69. Konus-Wind observation of GRB 120617A
  70. IPN Triangulation of GRB 120617A (short/intense)
  71. Konus-Wind observation of GRB 120602A
  72. IPN Triangulation of GRB 120602A (long/very bright)
  73. GRB 120614A: MAXI/GSC detection of a burst
  74. GRB 120612A: optical observations
  75. GRB 120612A: Swift/UVOT observations
  76. GRB 120612A: Swift-XRT refined Analysis
  77. GRB 120612A: Swift-BAT refined analysis
  78. GRB 120612A: Enhanced Swift-XRT position
  79. GRB 120612A: BOOTES-3 optical upper limit
  80. GRB 120612A: Swift detection of a burst
  81. GRB 120603A: Suzaku WAM observation of the prompt emission
  82. Konus-Wind observation of GRB 120603A
  83. IPN Triangulation of short GRB 120603A
  84. Fermi GBM trigger 120602.539 is not a GRB
  85. Konus-Wind observation of GRB 120528B
  86. GRB 120519A: Suzaku WAM observation of the prompt emission
  87. GRB 120528C: MAXI/GSC detection
  88. GRB 120521C redshift estimate
  89. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  90. GRB 120528B: MAXI/GSC detection
  91. GRB 120512A: Suzaku WAM observation of the prompt emission
  92. GRB 120521C: EVLA Localization of Afterglow
  93. GRB 120521C: EVLA 22 GHz Detection
  94. GRB120521B: SSO 2.3m upper limits
  95. Konus-Wind observation of GRB 120522A
  96. IPN triangulation of GRB 120522A (long/intense)
  97. GRB 120521B: Fermi GBM observation
  98. GRB 120521A: ATCA 34GHz upper limit
  99. GRB 120521C: Early Tautenburg limits
  100. GRB 120521C: EVLA 22 GHz Upper Limit

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