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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"

27606 results found.

  1. GRB 120712A: Swift-XRT refined Analysis
  2. GRB 120712A: GROND Detection of the Optical/NIR Afterglow Candidate and photo-z
  3. GRB 120712A: Swift-BAT refined analysis
  4. GRB 120712A: Swift detection of a burst with optical afterglow
  5. GRB 120711B: Swift-XRT refined Analysis
  6. GRB 120711A: Fermi LAT Detection
  7. GRB 120711B: Swift-BAT refined analysis
  8. GRB 120711B: Swift/UVOT Upper Limits
  9. GRB 120711A: Swift/UVOT Observations
  10. GRB 120709A: Swift/UVOT Observations
  11. Konus-Wind observation of GRB 120711A
  12. GRB 120711A: MASTER early OT detection
  13. GRB 120711A: Swift-XRT observations
  14. Konus-Wind observation of GRB 120709A
  15. GRB 120711A: GROND photometric redshift
  16. GRB 120711A: Fermi GBM observation
  17. Continued Skynet/PROMPT observations of GRB120711A
  18. GRB 120711A: ROTSE-III confirm of Optical Counterpart
  19. Swift detection of GRB 120711B or a new Galactic transient
  20. Skynet/PROMPT Observations of GRB120711A
  21. GRB 120709A: Fermi GBM detection
  22. GRB 120709A: Swift-XRT observations
  23. GRB 120709A: Matched filter analysis of Fermi-LAT data
  24. Konus-Wind observation of GRB 120707A
  25. IPN Triangulation of GRB 120707A
  26. GRB 120709A: Fermi-LAT Detection
  27. GRB 120707A: Fermi GBM Detection of a Bright Burst
  28. GRB 120703A: Swift/UVOT Detection
  29. GRB 120703A: Fermi GBM detection
  30. GRB 120703A: Swift-XRT refined Analysis
  31. GRB 120703A: Swift-BAT refined analysis
  32. GRB 120624B Suzaku WAM observation of the prompt emission
  33. Konus-Wind observation of GRB 120703A
  34. GRB 120703A: NOT optical observation
  35. GRB 120701A: Swift/UVOT Detection
  36. GRB 120701A: GROND detection of the afterglow
  37. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  38. Swift Trigger 525554 is noise
  39. GRB 120701A: Swift-XRT afterglow detection and analysis
  40. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  41. GRB 120701A: Swift-BAT refined analysis
  42. GRB 120630A: NOT optical source within the XRT error circle
  43. Swift Trigger 525554 is probably not a GRB
  44. GRB120624B: Chandra observations and afterglow detection
  45. Fermi Gamma-ray Burst Monitor trigger 120628.973 is not a GRB
  46. GRB 120624B Further Swift-XRT analysis
  47. GRB 120624B: Swift/UVOT Upper Limits
  48. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  49. GRB 120624B: Further analysis of the HAWKI observations
  50. GRB 120624B: Swift-XRT observations
  51. GRB 120624B: GROND upper limits
  52. GRB 120624B: NIR counterpart candidate from HAWKI
  53. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  54. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  55. Swift detection of Ginga 0834-430
  56. GRB 120624B: NOT optical upper limit
  57. Swift detection of IGR J17062-6143
  58. GRB 120624B: optical observations
  59. GRB 120624B, Swift-BAT refined analysis
  60. Konus-Wind observation of GRB 120624B
  61. GRB 120624B: Swift detection of a burst
  62. GRB 120624A: Fermi GBM observation
  63. GRB 120624B: Fermi-LAT Detection
  64. GRB 120624B: Fermi GBM detection
  65. IPN Triangulation of GRB 120624A (short/intense)
  66. Swift Trigger 524949: Noise fluctuation near a galaxy
  67. Swift trigger 524642 / SwJ1910.2-0546
  68. Swift Trigger 524642 is Swift J1910.2-0546
  69. Trigger 524584: Swift detection of Algol
  70. Swift triggers (#524542) on a Galactic source
  71. IPN Triangulation of GRB 120602A (long/very bright)
  72. GRB 120612A: Swift/UVOT observations
  73. GRB 120612A: Swift-XRT refined Analysis
  74. GRB 120612A: Swift-BAT refined analysis
  75. GRB 120612A: BOOTES-3 optical upper limit
  76. GRB 120612A: Swift detection of a burst
  77. Konus-Wind observation of GRB 120603A
  78. IPN Triangulation of short GRB 120603A
  79. Fermi GBM trigger 120602.539 is not a GRB
  80. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  81. GRB 120521B: Fermi GBM observation
  82. GRB 120521C: Early Tautenburg limits
  83. GRB 120521A: GROND Upper limits
  84. GRB 120521C: Swift-XRT refined Analysis
  85. GRB 120521C: Swift-BAT refined analysis
  86. GRB 120521C: Swift/UVOT Upper Limits
  87. GRB 120521B: Swift/UVOT Upper Limits
  88. GRB 120521C: MASTER optical limit
  89. GRB 120521B: GROND Upper limits
  90. GRB 120521A: Swift-XRT refined Analysis
  91. GRB 120521C: PAIRITEL NIR Upper Limits
  92. GRB 120521C: WHT optical observations
  93. GRB 120521C - NOT optical limits
  94. GRB120521C: Liverpool Telescope observations
  95. GRB 120521C: TAROT Calern observatory optical observations
  96. GRB 120521C: Swift detection of a burst
  97. GRB 120521B: Swift-BAT refined analysis
  98. GRB 120521B: Swift-XRT refined Analysis
  99. Swift starts a new program to find fainter transients
  100. IPN Triangulation of GRB 120519A (short/hard)

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