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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"

28273 results found.

  1. GRB 120624B Suzaku WAM observation of the prompt emission
  2. GRB 120703A: NOT optical observation
  3. GRB 120701A: Swift/UVOT Detection
  4. GRB 120701A: GROND detection of the afterglow
  5. GRB 120703A: Swift detection of a bright burst with an optical afterglow
  6. GRB 120701A: Swift-XRT afterglow detection and analysis
  7. GRB 120630A: Swift-BAT/-XRT/-UVOT refined analysis
  8. GRB 120701A: Swift-BAT refined analysis
  9. Swift Trigger 525554 is probably not a GRB
  10. GRB120624B: Chandra observations and afterglow detection
  11. GRB 120624B: Swift/UVOT Upper Limits
  12. Watcher follow-up observations of IGR J17062-6143 (Swift trigger 525148)
  13. GRB 120624B: Swift-XRT observations
  14. GRB 120624B: GROND upper limits
  15. GRB 120624B: NIR counterpart candidate from HAWKI
  16. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  17. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  18. Swift detection of Ginga 0834-430
  19. GRB 120624B: NOT optical upper limit
  20. Swift detection of IGR J17062-6143
  21. GRB 120624B: optical observations
  22. GRB 120624B, Swift-BAT refined analysis
  23. GRB 120624B: Fermi GBM fluence and peak photon flux correction
  24. GRB 120624B: Fermi-LAT Detection
  25. GRB 120624B: Fermi GBM detection
  26. IPN Triangulation of GRB 120624A (short/intense)
  27. Swift Trigger 524949: Noise fluctuation near a galaxy
  28. Swift trigger 524642 / SwJ1910.2-0546
  29. GRB 120602A: Suzaku WAM observation of the prompt emission
  30. Konus-Wind observation of GRB 120617A
  31. Swift triggers (#524542) on a Galactic source
  32. IPN Triangulation of GRB 120602A (long/very bright)
  33. GRB 120612A: optical observations
  34. GRB 120612A: Swift/UVOT observations
  35. GRB 120612A: Swift-XRT refined Analysis
  36. GRB 120612A: Swift-BAT refined analysis
  37. GRB 120612A: Enhanced Swift-XRT position
  38. GRB 120612A: BOOTES-3 optical upper limit
  39. GRB 120612A: Swift detection of a burst
  40. GRB 120603A: Suzaku WAM observation of the prompt emission
  41. Konus-Wind observation of GRB 120603A
  42. Konus-Wind observation of GRB 120528B
  43. GRB 120519A: Suzaku WAM observation of the prompt emission
  44. GRB 120528B: MAXI/GSC detection
  45. GRB 120512A: Suzaku WAM observation of the prompt emission
  46. GRB120521B: SSO 2.3m upper limits
  47. GRB 120521B: Fermi GBM observation
  48. GRB 120521C: Early Tautenburg limits
  49. GRB 120521A: GROND Upper limits
  50. GRB 120521C: Swift-XRT refined Analysis
  51. GRB 120521C: Swift-BAT refined analysis
  52. GRB 120521C: Keck Observations
  53. GRB 120521C: Swift/UVOT Upper Limits
  54. GRB 120521B: Swift/UVOT Upper Limits
  55. GRB 120521B: GROND Upper limits
  56. GRB 120521A: Swift-XRT refined Analysis
  57. GRB 120521C: PAIRITEL NIR Upper Limits
  58. GRB 120521C: Enhanced Swift-XRT position
  59. GRB 120521C: BOOTES-1 optical observations
  60. GRB 120521C - NOT optical limits
  61. GRB 120521C: TAROT Calern observatory optical observations
  62. GRB 120521C: Swift detection of a burst
  63. GRB 120521B: Swift-BAT refined analysis
  64. GRB 120521B: Swift-XRT refined Analysis
  65. Swift starts a new program to find fainter transients
  66. IPN Triangulation of GRB 120519A (short/hard)
  67. GRB 120521A: Swift/UVOT Upper Limits
  68. GRB 120521B: Enhanced Swift-XRT position
  69. GRB 120521A: Swift-BAT refined analysis
  70. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  71. GRB 120521B: TAROT La Silla observatory optical observations
  72. GRB 120521B: Swift detection of a burst
  73. GRB 120521A: Enhanced Swift-XRT position
  74. GRB 120521A: TAROT La Silla observatory optical observations
  75. GRB 120521A: Swift detection of a short burst
  76. GRB 120514A : Suzaku WAM observation of the prompt emission
  77. GRB 120512A: A long GRB detected by INTEGRAL
  78. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  79. GRB 120514A: GROND upper limits
  80. GRB 120514A: Swift/UVOT Upper Limits
  81. GRB 120514A: UKIRT IR observations
  82. Konus-Wind observation of GRB 120510A
  83. GRB 120514A: Swift-XRT refined Analysis
  84. GRB 120514A: APEX observations of the submm counterpart
  85. GRB 120514A: Enhanced Swift-XRT position
  86. GRB 120514A: Swift-BAT refined analysis
  87. GRB 120514A: TAROT Calern observatory optical observations
  88. GRB 120514A: Swift detection of a burst
  89. GRB 120422A: Konkoly optical observations
  90. Fermi Trigger 358364818: BOOTES-4 observations
  91. GRB 120510B/Fermi Trigger 358364818: MASTER possible OT candidate
  92. GRB 120510A: Swift XRT and UVOT observations
  93. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  94. GRB 120422A: P200 NIR detection
  95. GRB 120422A: Gemini-N detection of a supernova
  96. GRB 120422A: optical observations
  97. Konus-Wind observation of GRB 120427A
  98. Swift detection of 4U 1630-47
  99. GRB 120422A, the review of the sky area in plate archives
  100. Konus-Wind observation of GRB 120426A

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