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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"

37705 results found.

  1. GRB 120711A: a possible X-ray transient
  2. GRB 120711A: an bright long GRB detected with INTEGRAL
  3. Continued Skynet/PROMPT observations of GRB120711A
  4. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  5. Swift detection of GRB 120711B or a new Galactic transient
  6. GRB 120709A: Fermi GBM detection
  7. GRB 120709A: Swift-XRT observations
  8. GRB 120709A: Matched filter analysis of Fermi-LAT data
  9. GRB 120709A: optical afterglow limits
  10. Konus-Wind observation of GRB 120707A
  11. IPN Triangulation of GRB 120707A
  12. GRB 120709A: Fermi-LAT Detection
  13. GRB 120707A: Fermi GBM Detection of a Bright Burst
  14. GRB 120624B: mm detection at PdBI
  15. GRB 120703A: SMARTS optical/IR observations
  16. GBM triggers 120705.153 & 120705.322 were not GRBs
  17. GRB 120703A: Swift/UVOT Detection
  18. GRB 120703A: Fermi GBM detection
  19. GRB 120703A: Swift-XRT refined Analysis
  20. GRB 120703A: Enhanced Swift-XRT position
  21. GRB 120703A: Swift-BAT refined analysis
  22. GRB 120624B Suzaku WAM observation of the prompt emission
  23. Konus-Wind observation of GRB 120703A
  24. GRB 120703A: NOT optical observation
  25. GRB 120701A: Swift/UVOT Detection
  26. GRB 120701A: GROND detection of the afterglow
  27. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  28. GRB 120701A: Swift-XRT afterglow detection and analysis
  29. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  30. GRB 120701A: Swift-BAT refined analysis
  31. GRB 120630A: NOT optical source within the XRT error circle
  32. Swift Trigger 525554 is probably not a GRB
  33. GRB120624B: Chandra observations and afterglow detection
  34. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  35. GRB 120624B Further Swift-XRT analysis
  36. GRB 120624B: Swift/UVOT Upper Limits
  37. GRB 120624B: Further analysis of the HAWKI observations
  38. GRB 120624B: Swift-XRT observations
  39. GRB 120624B: GROND upper limits
  40. GRB 120624B: NIR counterpart candidate from HAWKI
  41. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  42. GRB 120624B: NOT optical upper limit
  43. GRB 120624B: optical observations
  44. GRB 120624B, Swift-BAT refined analysis
  45. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  46. Konus-Wind observation of GRB 120624B
  47. GRB 120624B: Swift detection of a burst
  48. GRB 120624A: Fermi GBM observation
  49. GRB 120624B: Fermi-LAT Detection
  50. Konus-Wind observation of GRB 120624A
  51. GRB 120624B: Fermi GBM detection
  52. IPN Triangulation of GRB 120624A (short/intense)
  53. GRB 120622A: MAXI/GSC detection
  54. Swift trigger 524642 / SwJ1910.2-0546
  55. GRB 120602A: Suzaku WAM observation of the prompt emission
  56. Konus-Wind observation of GRB 120617A
  57. IPN Triangulation of GRB 120617A (short/intense)
  58. Konus-Wind observation of GRB 120602A
  59. IPN Triangulation of GRB 120602A (long/very bright)
  60. GRB 120614A: MAXI/GSC detection of a burst
  61. GRB 120612A: optical observations
  62. GRB 120612A: Swift/UVOT observations
  63. GRB 120612A: Swift-XRT refined Analysis
  64. GRB 120612A: Swift-BAT refined analysis
  65. GRB 120612A: Enhanced Swift-XRT position
  66. GRB 120612A: BOOTES-3 optical upper limit
  67. GRB 120612A: Swift detection of a burst
  68. GRB 120603A: Suzaku WAM observation of the prompt emission
  69. GBM triggers 120604.526 & 120604.399 were not GRBs
  70. Konus-Wind observation of GRB 120603A
  71. IPN Triangulation of short GRB 120603A
  72. Fermi GBM trigger 120602.539 is not a GRB
  73. Konus-Wind observation of GRB 120528B
  74. GRB 120519A: Suzaku WAM observation of the prompt emission
  75. GRB 120528C: MAXI/GSC detection
  76. GRB 120521C redshift estimate
  77. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  78. GRB 120528B: MAXI/GSC detection
  79. GRB 120512A: Suzaku WAM observation of the prompt emission
  80. GRB 120521C: EVLA Localization of Afterglow
  81. GRB 120521C: EVLA 22 GHz Detection
  82. GRB120521B: SSO 2.3m upper limits
  83. Konus-Wind observation of GRB 120522A
  84. IPN triangulation of GRB 120522A (long/intense)
  85. GRB 120521B: Fermi GBM observation
  86. GRB 120521A: ATCA 34GHz upper limit
  87. GRB 120521C: Early Tautenburg limits
  88. GRB 120521C: EVLA 22 GHz Upper Limit
  89. GRB 120521A: GROND Upper limits
  90. GRB 120521C: Swift-XRT refined Analysis
  91. GRB 120521C: Swift-BAT refined analysis
  92. GRB 120521C: Keck Observations
  93. GRB 120521C: Swift/UVOT Upper Limits
  94. GRB 120521B: Swift/UVOT Upper Limits
  95. GRB 120521C: MASTER optical limit
  96. GRB 120521B: GROND Upper limits
  97. GRB 120521A: XRT light curve (Correction to GCN 13326)
  98. GRB 120521A: Swift-XRT refined Analysis
  99. GRB 120521C: PAIRITEL NIR Upper Limits
  100. GRB 120521C: Enhanced Swift-XRT position

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