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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"

37346 results found.

  1. GRB 120712A: Fermi GBM observation
  2. GRB 120711A: INTEGRAL/SPI observations
  3. GRB 120714A: Swift-XRT observations
  4. GRB120711B: MITSuME Ishigakijima upper limits
  5. GRB 120714A: Swift detection of a burst
  6. GRB 120711A: ATCA 34GHz further observations (upper limit)
  7. IPN Triangulation of GRB 120709A
  8. GRB 120712A: Swift/UVOT Detection
  9. GRB 120712A: VLT/Xshooter redshift
  10. GRB 120712A: Swift-XRT refined Analysis
  11. GRB 120712A Gemini-S redshift
  12. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  13. GRB 120712A: Enhanced Swift-XRT position
  14. GRB 120712A: Swift-BAT refined analysis
  15. GRB 120712A: Swift detection of a burst with optical afterglow
  16. GRB 120711B: Swift-XRT refined Analysis
  17. GRB 120711A: Fermi LAT Detection
  18. GRB 120711A: ATCA 34GHz upper limit
  19. GRB 120711B: Swift-BAT refined analysis
  20. GRB 120711B: Swift/UVOT Upper Limits
  21. GRB 120711A: Swift/UVOT Observations
  22. GRB 120709A: Swift/UVOT Observations
  23. Konus-Wind observation of GRB 120711A
  24. GRB 120711A: Fermi LAT detection
  25. GRB 120711A: MASTER early OT detection
  26. GRB 120711A: Swift-XRT observations
  27. GRB 120711A Gemini-S likely redshift
  28. Konus-Wind observation of GRB 120709A
  29. GRB 120711A: REM NIR early time detection
  30. GRB 120711A: GROND photometric redshift
  31. GRB 120711A: Fermi GBM observation
  32. GRB 120711A: MAXI/GSC detection
  33. GRB 120711A: a possible X-ray transient
  34. GRB 120711A: an bright long GRB detected with INTEGRAL
  35. Continued Skynet/PROMPT observations of GRB120711A
  36. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  37. Swift detection of GRB 120711B or a new Galactic transient
  38. GRB 120709A: Fermi GBM detection
  39. GRB 120709A: Swift-XRT observations
  40. GRB 120709A: Matched filter analysis of Fermi-LAT data
  41. GRB 120709A: optical afterglow limits
  42. Konus-Wind observation of GRB 120707A
  43. IPN Triangulation of GRB 120707A
  44. GRB 120709A: Fermi-LAT Detection
  45. GRB 120707A: Fermi GBM Detection of a Bright Burst
  46. GRB 120624B: mm detection at PdBI
  47. GRB 120703A: SMARTS optical/IR observations
  48. GRB 120703A: Swift/UVOT Detection
  49. GRB 120703A: Fermi GBM detection
  50. GRB 120703A: Swift-XRT refined Analysis
  51. GRB 120703A: Enhanced Swift-XRT position
  52. GRB 120703A: Swift-BAT refined analysis
  53. GRB 120624B Suzaku WAM observation of the prompt emission
  54. Konus-Wind observation of GRB 120703A
  55. GRB 120703A: NOT optical observation
  56. GRB 120701A: Swift/UVOT Detection
  57. GRB 120701A: GROND detection of the afterglow
  58. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  59. GRB 120701A: Swift-XRT afterglow detection and analysis
  60. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  61. GRB 120701A: Swift-BAT refined analysis
  62. GRB 120630A: NOT optical source within the XRT error circle
  63. Swift Trigger 525554 is probably not a GRB
  64. GRB120624B: Chandra observations and afterglow detection
  65. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  66. GRB 120624B Further Swift-XRT analysis
  67. GRB 120624B: Swift/UVOT Upper Limits
  68. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  69. GRB 120624B: Further analysis of the HAWKI observations
  70. GRB 120624B: Swift-XRT observations
  71. GRB 120624B: GROND upper limits
  72. GRB 120624B: NIR counterpart candidate from HAWKI
  73. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  74. GRB 120624B: NOT optical upper limit
  75. GRB 120624B: optical observations
  76. GRB 120624B, Swift-BAT refined analysis
  77. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  78. Konus-Wind observation of GRB 120624B
  79. GRB 120624B: Swift detection of a burst
  80. GRB 120624A: Fermi GBM observation
  81. GRB 120624B: Fermi-LAT Detection
  82. Konus-Wind observation of GRB 120624A
  83. GRB 120624B: Fermi GBM detection
  84. IPN Triangulation of GRB 120624A (short/intense)
  85. GRB 120622A: MAXI/GSC detection
  86. Swift trigger 524642 / SwJ1910.2-0546
  87. GRB 120602A: Suzaku WAM observation of the prompt emission
  88. Konus-Wind observation of GRB 120617A
  89. IPN Triangulation of GRB 120617A (short/intense)
  90. Konus-Wind observation of GRB 120602A
  91. IPN Triangulation of GRB 120602A (long/very bright)
  92. GRB 120614A: MAXI/GSC detection of a burst
  93. GRB 120612A: optical observations
  94. GRB 120612A: Swift/UVOT observations
  95. GRB 120612A: Swift-XRT refined Analysis
  96. GRB 120612A: Swift-BAT refined analysis
  97. GRB 120612A: Enhanced Swift-XRT position
  98. GRB 120612A: BOOTES-3 optical upper limit
  99. GRB 120612A: Swift detection of a burst
  100. GRB 120603A: Suzaku WAM observation of the prompt emission

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