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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"

37321 results found.

  1. GRB 120711A: Swift-XRT observations
  2. GRB 120711A Gemini-S likely redshift
  3. Konus-Wind observation of GRB 120709A
  4. GRB 120711A: REM NIR early time detection
  5. GRB 120711A: GROND photometric redshift
  6. GRB 120711A: Fermi GBM observation
  7. GRB 120711A: MAXI/GSC detection
  8. GRB 120711A: a possible X-ray transient
  9. GRB 120711A: an bright long GRB detected with INTEGRAL
  10. Continued Skynet/PROMPT observations of GRB120711A
  11. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  12. Swift detection of GRB 120711B or a new Galactic transient
  13. GRB 120709A: Fermi GBM detection
  14. GRB 120709A: Swift-XRT observations
  15. GRB 120709A: Matched filter analysis of Fermi-LAT data
  16. GRB 120709A: optical afterglow limits
  17. Konus-Wind observation of GRB 120707A
  18. IPN Triangulation of GRB 120707A
  19. GRB 120709A: Fermi-LAT Detection
  20. GRB 120707A: Fermi GBM Detection of a Bright Burst
  21. GRB 120624B: mm detection at PdBI
  22. GRB 120703A: SMARTS optical/IR observations
  23. GRB 120703A: Swift/UVOT Detection
  24. GRB 120703A: Fermi GBM detection
  25. GRB 120703A: Swift-XRT refined Analysis
  26. GRB 120703A: Enhanced Swift-XRT position
  27. GRB 120703A: Swift-BAT refined analysis
  28. GRB 120624B Suzaku WAM observation of the prompt emission
  29. Konus-Wind observation of GRB 120703A
  30. GRB 120703A: NOT optical observation
  31. GRB 120701A: Swift/UVOT Detection
  32. GRB 120701A: GROND detection of the afterglow
  33. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  34. GRB 120701A: Swift-XRT afterglow detection and analysis
  35. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  36. GRB 120701A: Swift-BAT refined analysis
  37. GRB 120630A: NOT optical source within the XRT error circle
  38. Swift Trigger 525554 is probably not a GRB
  39. GRB120624B: Chandra observations and afterglow detection
  40. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  41. GRB 120624B Further Swift-XRT analysis
  42. GRB 120624B: Swift/UVOT Upper Limits
  43. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  44. GRB 120624B: Further analysis of the HAWKI observations
  45. GRB 120624B: Swift-XRT observations
  46. GRB 120624B: GROND upper limits
  47. GRB 120624B: NIR counterpart candidate from HAWKI
  48. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  49. GRB 120624B: NOT optical upper limit
  50. GRB 120624B: optical observations
  51. GRB 120624B, Swift-BAT refined analysis
  52. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  53. Konus-Wind observation of GRB 120624B
  54. GRB 120624B: Swift detection of a burst
  55. GRB 120624A: Fermi GBM observation
  56. GRB 120624B: Fermi-LAT Detection
  57. Konus-Wind observation of GRB 120624A
  58. GRB 120624B: Fermi GBM detection
  59. IPN Triangulation of GRB 120624A (short/intense)
  60. GRB 120622A: MAXI/GSC detection
  61. Swift trigger 524642 / SwJ1910.2-0546
  62. GRB 120602A: Suzaku WAM observation of the prompt emission
  63. Konus-Wind observation of GRB 120617A
  64. IPN Triangulation of GRB 120617A (short/intense)
  65. Konus-Wind observation of GRB 120602A
  66. IPN Triangulation of GRB 120602A (long/very bright)
  67. GRB 120614A: MAXI/GSC detection of a burst
  68. GRB 120612A: optical observations
  69. GRB 120612A: Swift/UVOT observations
  70. GRB 120612A: Swift-XRT refined Analysis
  71. GRB 120612A: Swift-BAT refined analysis
  72. GRB 120612A: Enhanced Swift-XRT position
  73. GRB 120612A: BOOTES-3 optical upper limit
  74. GRB 120612A: Swift detection of a burst
  75. GRB 120603A: Suzaku WAM observation of the prompt emission
  76. Konus-Wind observation of GRB 120603A
  77. IPN Triangulation of short GRB 120603A
  78. Fermi GBM trigger 120602.539 is not a GRB
  79. Konus-Wind observation of GRB 120528B
  80. GRB 120519A: Suzaku WAM observation of the prompt emission
  81. GRB 120528C: MAXI/GSC detection
  82. GRB 120521C redshift estimate
  83. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  84. GRB 120528B: MAXI/GSC detection
  85. GRB 120512A: Suzaku WAM observation of the prompt emission
  86. GRB 120521C: EVLA Localization of Afterglow
  87. GRB 120521C: EVLA 22 GHz Detection
  88. GRB120521B: SSO 2.3m upper limits
  89. Konus-Wind observation of GRB 120522A
  90. IPN triangulation of GRB 120522A (long/intense)
  91. GRB 120521B: Fermi GBM observation
  92. GRB 120521A: ATCA 34GHz upper limit
  93. GRB 120521C: Early Tautenburg limits
  94. GRB 120521C: EVLA 22 GHz Upper Limit
  95. GRB 120521A: GROND Upper limits
  96. GRB 120521C: Swift-XRT refined Analysis
  97. GRB 120521C: Swift-BAT refined analysis
  98. GRB 120521C: Keck Observations
  99. GRB 120521C: Swift/UVOT Upper Limits
  100. GRB 120521B: Swift/UVOT Upper Limits

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