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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"

27938 results found.

  1. GRB 120709A: Swift/UVOT Observations
  2. Konus-Wind observation of GRB 120711A
  3. GRB 120711A: Fermi LAT detection
  4. GRB 120711A: MASTER early OT detection
  5. GRB 120711A: Swift-XRT observations
  6. Konus-Wind observation of GRB 120709A
  7. GRB 120711A: REM NIR early time detection
  8. GRB 120711A: GROND photometric redshift
  9. GRB 120711A: MAXI/GSC detection
  10. Swift detection of GRB 120711B or a new Galactic transient
  11. GRB 120709A: Fermi GBM detection
  12. GRB 120709A: Swift-XRT observations
  13. IPN Triangulation of GRB 120707A
  14. GRB 120709A: Fermi-LAT Detection
  15. GRB 120707A: Fermi GBM Detection of a Bright Burst
  16. GRB 120624B: mm detection at PdBI
  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 120701A: Swift/UVOT Detection
  25. GRB 120701A: GROND detection of the afterglow
  26. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  27. Swift Trigger 525554 is noise
  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. GRB 120624B Further Swift-XRT analysis
  35. GRB 120624B: Swift/UVOT Upper Limits
  36. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  37. GRB 120624B: Swift-XRT observations
  38. GRB 120624B: GROND upper limits
  39. XRF 120626B: MAXI/GSC detection
  40. GRB 120624B: NIR counterpart candidate from HAWKI
  41. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  42. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  43. Swift detection of Ginga 0834-430
  44. GRB 120624B: NOT optical upper limit
  45. Swift detection of IGR J17062-6143
  46. GRB 120624B: optical observations
  47. GRB 120624B, Swift-BAT refined analysis
  48. Konus-Wind observation of GRB 120624B
  49. GRB 120624B: Swift detection of a burst
  50. GRB 120624B: Fermi-LAT Detection
  51. GRB 120624B: Fermi GBM detection
  52. IPN Triangulation of GRB 120624A (short/intense)
  53. Swift Trigger 524949: Noise fluctuation near a galaxy
  54. GRB 120622A: MAXI/GSC detection
  55. Swift trigger 524642 / SwJ1910.2-0546
  56. GRB 120602A: Suzaku WAM observation of the prompt emission
  57. Swift Trigger 524642 is Swift J1910.2-0546
  58. Trigger 524584: Swift detection of Algol
  59. Swift triggers (#524542) on a Galactic source
  60. IPN Triangulation of GRB 120602A (long/very bright)
  61. GRB 120614A: MAXI/GSC detection of a burst
  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. Konus-Wind observation of GRB 120603A
  70. Konus-Wind observation of GRB 120528B
  71. GRB 120519A: Suzaku WAM observation of the prompt emission
  72. GRB 120528C: MAXI/GSC detection
  73. GRB 120521C redshift estimate
  74. GRB 120528B: MAXI/GSC detection
  75. GRB 120512A: Suzaku WAM observation of the prompt emission
  76. GRB 120521C: EVLA Localization of Afterglow
  77. GRB 120521C: EVLA 22 GHz Detection
  78. GRB120521B: SSO 2.3m upper limits
  79. GRB 120521B: Fermi GBM observation
  80. GRB 120521C: Early Tautenburg limits
  81. GRB 120521C: EVLA 22 GHz Upper Limit
  82. GRB 120521A: GROND Upper limits
  83. GRB 120521C: Swift-XRT refined Analysis
  84. GRB 120521C: Swift-BAT refined analysis
  85. GRB 120521C: Swift/UVOT Upper Limits
  86. GRB 120521B: Swift/UVOT Upper Limits
  87. GRB 120521C: MASTER optical limit
  88. GRB 120521B: GROND Upper limits
  89. GRB 120521A: XRT light curve (Correction to GCN 13326)
  90. GRB 120521A: Swift-XRT refined Analysis
  91. GRB 120521C: PAIRITEL NIR Upper Limits
  92. GRB 120521C: Enhanced Swift-XRT position
  93. GRB120521C: Liverpool Telescope observations
  94. GRB 120521C: TAROT Calern observatory optical observations
  95. GRB 120521C: Swift detection of a burst
  96. GRB 120521B: Swift-BAT refined analysis
  97. GRB 120521B: Swift-XRT refined Analysis
  98. Swift starts a new program to find fainter transients
  99. IPN Triangulation of GRB 120519A (short/hard)
  100. GRB 120521A: Swift/UVOT Upper Limits

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