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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"

27932 results found.

  1. GRB 120711A: REM NIR early time detection
  2. GRB 120711A: GROND photometric redshift
  3. GRB 120711A: MAXI/GSC detection
  4. Swift detection of GRB 120711B or a new Galactic transient
  5. GRB 120709A: Fermi GBM detection
  6. GRB 120709A: Swift-XRT observations
  7. IPN Triangulation of GRB 120707A
  8. GRB 120709A: Fermi-LAT Detection
  9. GRB 120707A: Fermi GBM Detection of a Bright Burst
  10. GRB 120624B: mm detection at PdBI
  11. GRB 120703A: Swift/UVOT Detection
  12. GRB 120703A: Fermi GBM detection
  13. GRB 120703A: Swift-XRT refined Analysis
  14. GRB 120703A: Enhanced Swift-XRT position
  15. GRB 120703A: Swift-BAT refined analysis
  16. GRB 120624B Suzaku WAM observation of the prompt emission
  17. Konus-Wind observation of GRB 120703A
  18. GRB 120701A: Swift/UVOT Detection
  19. GRB 120701A: GROND detection of the afterglow
  20. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  21. Swift Trigger 525554 is noise
  22. GRB 120701A: Swift-XRT afterglow detection and analysis
  23. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  24. GRB 120701A: Swift-BAT refined analysis
  25. GRB 120630A: NOT optical source within the XRT error circle
  26. Swift Trigger 525554 is probably not a GRB
  27. GRB120624B: Chandra observations and afterglow detection
  28. GRB 120624B Further Swift-XRT analysis
  29. GRB 120624B: Swift/UVOT Upper Limits
  30. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  31. GRB 120624B: Swift-XRT observations
  32. GRB 120624B: GROND upper limits
  33. XRF 120626B: MAXI/GSC detection
  34. GRB 120624B: NIR counterpart candidate from HAWKI
  35. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  36. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  37. Swift detection of Ginga 0834-430
  38. GRB 120624B: NOT optical upper limit
  39. Swift detection of IGR J17062-6143
  40. GRB 120624B: optical observations
  41. GRB 120624B, Swift-BAT refined analysis
  42. Konus-Wind observation of GRB 120624B
  43. GRB 120624B: Swift detection of a burst
  44. GRB 120624B: Fermi-LAT Detection
  45. GRB 120624B: Fermi GBM detection
  46. IPN Triangulation of GRB 120624A (short/intense)
  47. Swift Trigger 524949: Noise fluctuation near a galaxy
  48. GRB 120622A: MAXI/GSC detection
  49. Swift trigger 524642 / SwJ1910.2-0546
  50. GRB 120602A: Suzaku WAM observation of the prompt emission
  51. Swift Trigger 524642 is Swift J1910.2-0546
  52. Trigger 524584: Swift detection of Algol
  53. Swift triggers (#524542) on a Galactic source
  54. IPN Triangulation of GRB 120602A (long/very bright)
  55. GRB 120614A: MAXI/GSC detection of a burst
  56. GRB 120612A: Swift/UVOT observations
  57. GRB 120612A: Swift-XRT refined Analysis
  58. GRB 120612A: Swift-BAT refined analysis
  59. GRB 120612A: Enhanced Swift-XRT position
  60. GRB 120612A: BOOTES-3 optical upper limit
  61. GRB 120612A: Swift detection of a burst
  62. GRB 120603A: Suzaku WAM observation of the prompt emission
  63. Konus-Wind observation of GRB 120603A
  64. Konus-Wind observation of GRB 120528B
  65. GRB 120519A: Suzaku WAM observation of the prompt emission
  66. GRB 120528C: MAXI/GSC detection
  67. GRB 120521C redshift estimate
  68. GRB 120528B: MAXI/GSC detection
  69. GRB 120512A: Suzaku WAM observation of the prompt emission
  70. GRB 120521C: EVLA Localization of Afterglow
  71. GRB 120521C: EVLA 22 GHz Detection
  72. GRB120521B: SSO 2.3m upper limits
  73. GRB 120521B: Fermi GBM observation
  74. GRB 120521C: Early Tautenburg limits
  75. GRB 120521C: EVLA 22 GHz Upper Limit
  76. GRB 120521A: GROND Upper limits
  77. GRB 120521C: Swift-XRT refined Analysis
  78. GRB 120521C: Swift-BAT refined analysis
  79. GRB 120521C: Swift/UVOT Upper Limits
  80. GRB 120521B: Swift/UVOT Upper Limits
  81. GRB 120521C: MASTER optical limit
  82. GRB 120521B: GROND Upper limits
  83. GRB 120521A: XRT light curve (Correction to GCN 13326)
  84. GRB 120521A: Swift-XRT refined Analysis
  85. GRB 120521C: PAIRITEL NIR Upper Limits
  86. GRB 120521C: Enhanced Swift-XRT position
  87. GRB120521C: Liverpool Telescope observations
  88. GRB 120521C: TAROT Calern observatory optical observations
  89. GRB 120521C: Swift detection of a burst
  90. GRB 120521B: Swift-BAT refined analysis
  91. GRB 120521B: Swift-XRT refined Analysis
  92. Swift starts a new program to find fainter transients
  93. IPN Triangulation of GRB 120519A (short/hard)
  94. GRB 120521A: Swift/UVOT Upper Limits
  95. GRB 120521B: Enhanced Swift-XRT position
  96. GRB 120521A: Swift-BAT refined analysis
  97. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  98. GRB120521B: Faulkes Telescope South observations
  99. GRB 120521B: TAROT La Silla observatory optical observations
  100. GRB 120521B: Swift detection of a burst

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