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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"

28296 results found.

  1. GRB 120711B: Swift/UVOT Upper Limits
  2. GRB 120711A: Swift/UVOT Observations
  3. GRB 120711A: Fermi LAT detection
  4. GRB 120711A: MASTER early OT detection
  5. GRB 120711A: Swift-XRT observations
  6. GRB 120711A: REM NIR early time detection
  7. GRB 120711A: GROND photometric redshift
  8. GRB 120711A: Fermi GBM observation
  9. GRB 120711A: an bright long GRB detected with INTEGRAL
  10. Continued Skynet/PROMPT observations of GRB120711A
  11. Swift detection of GRB 120711B or a new Galactic transient
  12. Skynet/PROMPT Observations of GRB120711A
  13. GRB 120709A: Fermi GBM detection
  14. GRB 120709A: Swift-XRT observations
  15. GRB 120709A: optical afterglow limits
  16. IPN Triangulation of GRB 120707A
  17. GRB 120709A: Fermi-LAT Detection
  18. GRB 120707A: Fermi GBM Detection of a Bright Burst
  19. GRB 120624B: mm detection at PdBI
  20. GRB 120703A: Swift/UVOT Detection
  21. GRB 120703A: Swift-XRT refined Analysis
  22. GRB 120703A: Enhanced Swift-XRT position
  23. GRB 120703A: Swift-BAT refined analysis
  24. GRB 120624B Suzaku WAM observation of the prompt emission
  25. GRB 120703A: NOT optical observation
  26. GRB 120701A: Swift/UVOT Detection
  27. GRB 120701A: GROND detection of the afterglow
  28. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  29. GRB 120701A: Swift-XRT afterglow detection and analysis
  30. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  31. GRB 120701A: Swift-BAT refined analysis
  32. Swift Trigger 525554 is probably not a GRB
  33. GRB120624B: Chandra observations and afterglow detection
  34. GRB 120624B: Swift/UVOT Upper Limits
  35. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  36. GRB 120624B: Swift-XRT observations
  37. GRB 120624B: GROND upper limits
  38. GRB 120624B: NIR counterpart candidate from HAWKI
  39. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  40. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  41. Swift detection of Ginga 0834-430
  42. GRB 120624B: NOT optical upper limit
  43. Swift detection of IGR J17062-6143
  44. GRB 120624B: optical observations
  45. GRB 120624B, Swift-BAT refined analysis
  46. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  47. GRB 120624B: Fermi-LAT Detection
  48. GRB 120624B: Fermi GBM detection
  49. IPN Triangulation of GRB 120624A (short/intense)
  50. Swift Trigger 524949: Noise fluctuation near a galaxy
  51. Swift trigger 524642 / SwJ1910.2-0546
  52. GRB 120602A: Suzaku WAM observation of the prompt emission
  53. Konus-Wind observation of GRB 120617A
  54. Swift triggers (#524542) on a Galactic source
  55. IPN Triangulation of GRB 120602A (long/very bright)
  56. GRB 120612A: optical observations
  57. GRB 120612A: Swift/UVOT observations
  58. GRB 120612A: Swift-XRT refined Analysis
  59. GRB 120612A: Swift-BAT refined analysis
  60. GRB 120612A: Enhanced Swift-XRT position
  61. GRB 120612A: BOOTES-3 optical upper limit
  62. GRB 120612A: Swift detection of a burst
  63. GRB 120603A: Suzaku WAM observation of the prompt emission
  64. Konus-Wind observation of GRB 120603A
  65. Konus-Wind observation of GRB 120528B
  66. GRB 120519A: Suzaku WAM observation of the prompt emission
  67. GRB 120528B: MAXI/GSC detection
  68. GRB 120512A: Suzaku WAM observation of the prompt emission
  69. GRB120521B: SSO 2.3m upper limits
  70. GRB 120521B: Fermi GBM observation
  71. GRB 120521C: Early Tautenburg limits
  72. GRB 120521A: GROND Upper limits
  73. GRB 120521C: Swift-XRT refined Analysis
  74. GRB 120521C: Swift-BAT refined analysis
  75. GRB 120521C: Keck Observations
  76. GRB 120521C: Swift/UVOT Upper Limits
  77. GRB 120521B: Swift/UVOT Upper Limits
  78. GRB 120521B: GROND Upper limits
  79. GRB 120521A: Swift-XRT refined Analysis
  80. GRB 120521C: PAIRITEL NIR Upper Limits
  81. GRB 120521C: Enhanced Swift-XRT position
  82. GRB 120521C: BOOTES-1 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. Swift starts a new program to find fainter transients
  89. IPN Triangulation of GRB 120519A (short/hard)
  90. GRB 120521A: Swift/UVOT Upper Limits
  91. GRB 120521B: Enhanced Swift-XRT position
  92. GRB 120521A: Swift-BAT refined analysis
  93. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  94. GRB 120521B: TAROT La Silla observatory optical observations
  95. GRB 120521B: Swift detection of a burst
  96. GRB 120521A: Enhanced Swift-XRT position
  97. GRB 120521A: TAROT La Silla observatory optical observations
  98. GRB 120521A: Swift detection of a short burst
  99. GRB 120514A : Suzaku WAM observation of the prompt emission
  100. GRB 120512A: A long GRB detected by INTEGRAL

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