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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"

43099 results found.

  1. GRB 120701A: Swift/UVOT Detection
  2. GRB 120701A: GROND detection of the afterglow
  3. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  4. Swift Trigger 525554 is noise
  5. GRB 120701A: Swift-XRT afterglow detection and analysis
  6. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  7. GRB 120701A: Swift-BAT refined analysis
  8. GRB 120630A: NOT optical source within the XRT error circle
  9. Swift Trigger 525554 is probably not a GRB
  10. GRB120624B: Chandra observations and afterglow detection
  11. GRB 120624B Further Swift-XRT analysis
  12. GRB 120624B: Swift/UVOT Upper Limits
  13. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  14. GRB 120624B: Further analysis of the HAWKI observations
  15. GRB 120624B: Swift-XRT observations
  16. GRB 120624B: GROND upper limits
  17. XRF 120626B: MAXI/GSC detection
  18. GRB 120624B: NIR counterpart candidate from HAWKI
  19. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  20. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  21. Swift detection of Ginga 0834-430
  22. GRB 120624B: NOT optical upper limit
  23. Swift detection of IGR J17062-6143
  24. GRB 120624B: optical observations
  25. GRB 120624B, Swift-BAT refined analysis
  26. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  27. Konus-Wind observation of GRB 120624B
  28. GRB 120624B: Swift detection of a burst
  29. GRB 120624A: Fermi GBM observation
  30. GRB 120624B: Fermi-LAT Detection
  31. Konus-Wind observation of GRB 120624A
  32. GRB 120624B: Fermi GBM detection
  33. IPN Triangulation of GRB 120624A (short/intense)
  34. Swift Trigger 524949: Noise fluctuation near a galaxy
  35. GRB 120622A: MAXI/GSC detection
  36. Swift trigger 524642 / SwJ1910.2-0546
  37. GRB 120602A: Suzaku WAM observation of the prompt emission
  38. Konus-Wind observation of GRB 120617A
  39. IPN Triangulation of GRB 120617A (short/intense)
  40. Swift Trigger 524642 is Swift J1910.2-0546
  41. Trigger 524584: Swift detection of Algol
  42. Swift triggers (#524542) on a Galactic source
  43. Konus-Wind observation of GRB 120602A
  44. IPN Triangulation of GRB 120602A (long/very bright)
  45. GRB 120614A: MAXI/GSC detection of a burst
  46. GRB 120612A: optical observations
  47. GRB 120612A: Swift/UVOT observations
  48. GRB 120612A: Swift-XRT refined Analysis
  49. GRB 120612A: Swift-BAT refined analysis
  50. GRB 120612A: Enhanced Swift-XRT position
  51. GRB 120612A: BOOTES-3 optical upper limit
  52. GRB 120612A: Swift detection of a burst
  53. GRB 120603A: Suzaku WAM observation of the prompt emission
  54. GBM triggers 120604.526 & 120604.399 were not GRBs
  55. Konus-Wind observation of GRB 120603A
  56. IPN Triangulation of short GRB 120603A
  57. Konus-Wind observation of GRB 120528B
  58. GRB 120519A: Suzaku WAM observation of the prompt emission
  59. GRB 120528C: MAXI/GSC detection
  60. GRB 120521C redshift estimate
  61. GRB 120512A: Suzaku WAM observation of the prompt emission
  62. GRB 120521C: EVLA Localization of Afterglow
  63. GRB 120521C: EVLA 22 GHz Detection
  64. GRB120521B: SSO 2.3m upper limits
  65. Konus-Wind observation of GRB 120522A
  66. IPN triangulation of GRB 120522A (long/intense)
  67. GRB 120521B: Fermi GBM observation
  68. GRB 120521A: ATCA 34GHz upper limit
  69. GRB 120521C: Early Tautenburg limits
  70. GRB 120521C: EVLA 22 GHz Upper Limit
  71. GRB 120521A: GROND Upper limits
  72. GRB 120521C: Swift-XRT refined Analysis
  73. GRB 120521C: Keck Observations
  74. GRB 120521C: Swift/UVOT Upper Limits
  75. GRB 120521B: Swift/UVOT Upper Limits
  76. GRB 120521C: MASTER optical limit
  77. GRB 120521B: GROND Upper limits
  78. GRB 120521A: XRT light curve (Correction to GCN 13326)
  79. GRB 120521A: Swift-XRT refined Analysis
  80. GRB 120521C: PAIRITEL NIR Upper Limits
  81. GRB 120521C: Enhanced Swift-XRT position
  82. GRB 120521C: WHT optical observations
  83. GRB 120521C - NOT optical limits
  84. GRB 120521C: TAROT Calern observatory optical observations
  85. GRB 120521C: Swift detection of a burst
  86. GRB 120521B: Swift-BAT refined analysis
  87. GRB 120521B: Swift-XRT refined Analysis
  88. Konus-Wind observation of GRB 120519A
  89. Swift starts a new program to find fainter transients
  90. IPN Triangulation of GRB 120519A (short/hard)
  91. GRB 120521A: Swift/UVOT Upper Limits
  92. GRB 120521B: Enhanced Swift-XRT position
  93. GRB 120521A: Swift-BAT refined analysis
  94. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  95. GRB 120521B: TAROT La Silla observatory optical observations
  96. GRB 120521B: Swift detection of a burst
  97. GRB 120521A: Enhanced Swift-XRT position
  98. GRB 120521A: TAROT La Silla observatory optical observations
  99. GRB 120521A: Swift detection of a short burst
  100. GRB 120514A : Suzaku WAM observation of the prompt emission

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