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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"

43844 results found.

  1. GRB 120624B: NIR counterpart candidate from HAWKI
  2. Skynet/PROMPT observations of IGR J17062-6143 (Swift trigger 525148)
  3. Swift detection of Ginga 0834-430
  4. GRB 120624B: NOT optical upper limit
  5. Swift detection of IGR J17062-6143
  6. GRB 120624B: optical observations
  7. GRB 120624B, Swift-BAT refined analysis
  8. Konus-Wind observation of GRB 120624B
  9. GRB 120624B: Swift detection of a burst
  10. GRB 120624A: Fermi GBM observation
  11. GRB 120624B: Fermi-LAT Detection
  12. Konus-Wind observation of GRB 120624A
  13. GRB 120624B: Fermi GBM detection
  14. IPN Triangulation of GRB 120624A (short/intense)
  15. Swift Trigger 524949: Noise fluctuation near a galaxy
  16. GRB 120622A: MAXI/GSC detection
  17. Swift trigger 524642 / SwJ1910.2-0546
  18. GRB 120602A: Suzaku WAM observation of the prompt emission
  19. Konus-Wind observation of GRB 120617A
  20. IPN Triangulation of GRB 120617A (short/intense)
  21. Swift Trigger 524642 is Swift J1910.2-0546
  22. Trigger 524584: Swift detection of Algol
  23. Swift triggers (#524542) on a Galactic source
  24. Konus-Wind observation of GRB 120602A
  25. IPN Triangulation of GRB 120602A (long/very bright)
  26. GRB 120614A: MAXI/GSC detection of a burst
  27. GRB 120612A: optical observations
  28. GRB 120612A: Swift/UVOT observations
  29. GRB 120612A: Swift-XRT refined Analysis
  30. GRB 120612A: Swift-BAT refined analysis
  31. GRB 120612A: Enhanced Swift-XRT position
  32. GRB 120612A: BOOTES-3 optical upper limit
  33. GRB 120612A: Swift detection of a burst
  34. GRB 120603A: Suzaku WAM observation of the prompt emission
  35. GBM triggers 120604.526 & 120604.399 were not GRBs
  36. Konus-Wind observation of GRB 120603A
  37. IPN Triangulation of short GRB 120603A
  38. Fermi GBM trigger 120602.539 is not a GRB
  39. Konus-Wind observation of GRB 120528B
  40. GRB 120519A: Suzaku WAM observation of the prompt emission
  41. GRB 120528C: MAXI/GSC detection
  42. GRB 120521C redshift estimate
  43. Fermi Gamma-ray Burst Monitor trigger 120527.573 is not a GRB
  44. GRB 120528B: MAXI/GSC detection
  45. GRB 120512A: Suzaku WAM observation of the prompt emission
  46. GRB 120521C: EVLA Localization of Afterglow
  47. GRB 120521C: EVLA 22 GHz Detection
  48. GRB120521B: SSO 2.3m upper limits
  49. Konus-Wind observation of GRB 120522A
  50. IPN triangulation of GRB 120522A (long/intense)
  51. GRB 120521B: Fermi GBM observation
  52. GRB 120521A: ATCA 34GHz upper limit
  53. GRB 120521C: Early Tautenburg limits
  54. GRB 120521C: EVLA 22 GHz Upper Limit
  55. GRB 120521A: GROND Upper limits
  56. GRB 120521C: Swift-XRT refined Analysis
  57. GRB 120521C: Swift-BAT refined analysis
  58. GRB 120521C: Keck Observations
  59. GRB 120521C: MASTER optical limit
  60. GRB 120521B: GROND Upper limits
  61. GRB 120521A: XRT light curve (Correction to GCN 13326)
  62. GRB 120521A: Swift-XRT refined Analysis
  63. GRB 120521C: PAIRITEL NIR Upper Limits
  64. GRB 120521C: Enhanced Swift-XRT position
  65. GRB 120521C: BOOTES-1 optical observations
  66. GRB 120521C: WHT optical observations
  67. GRB 120521C - NOT optical limits
  68. GRB120521C: Liverpool Telescope observations
  69. GRB 120521C: TAROT Calern observatory optical observations
  70. GRB 120521C: Swift detection of a burst
  71. GRB 120521B: Swift-BAT refined analysis
  72. GRB 120521B: Swift-XRT refined Analysis
  73. Konus-Wind observation of GRB 120519A
  74. Swift starts a new program to find fainter transients
  75. IPN Triangulation of GRB 120519A (short/hard)
  76. GRB 120521B: Enhanced Swift-XRT position
  77. GRB 120521A: Swift-BAT refined analysis
  78. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  79. GRB120521B: Faulkes Telescope South observations
  80. GRB 120521B: TAROT La Silla observatory optical observations
  81. GRB 120521B: Swift detection of a burst
  82. GRB 120521A: Enhanced Swift-XRT position
  83. GRB 120521A: TAROT La Silla observatory optical observations
  84. GRB 120521A: Swift detection of a short burst
  85. GRB 120514A : Suzaku WAM observation of the prompt emission
  86. GRB 120512A: A long GRB detected by INTEGRAL
  87. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  88. GRB 120514A: GROND upper limits
  89. GRB 120514A: Swift/UVOT Upper Limits
  90. GRB 120514A: UKIRT IR observations
  91. Konus-Wind observation of GRB 120510A
  92. GRB 120514A: Swift-XRT refined Analysis
  93. GRB 120514A: APEX observations of the submm counterpart
  94. GRB 120514A: Enhanced Swift-XRT position
  95. GRB 120514A: Swift-BAT refined analysis
  96. GRB 120514A: TAROT Calern observatory optical observations
  97. GRB 120514A: Swift detection of a burst
  98. GRB 120422A: Konkoly optical observations
  99. Fermi GBM Trigger 358364818 is not a GRB
  100. Fermi Trigger 358364818: BOOTES-4 observations

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