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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"

19663 results found.

  1. GRB 120624B: Discussion of Fermi and Swift measurements and future Swift observations
  2. Swift detection of Ginga 0834-430
  3. GRB 120624B: NOT optical upper limit
  4. Swift detection of IGR J17062-6143
  5. GRB 120624B: optical observations
  6. GRB 120624B, Swift-BAT refined analysis
  7. GRB 120624B: Swift detection of a burst
  8. GRB 120624B: Fermi-LAT Detection
  9. IPN Triangulation of GRB 120624A (short/intense)
  10. Swift Trigger 524949: Noise fluctuation near a galaxy
  11. Swift trigger 524642 / SwJ1910.2-0546
  12. GRB 120602A: Suzaku WAM observation of the prompt emission
  13. Swift Trigger 524642 is Swift J1910.2-0546
  14. Trigger 524584: Swift detection of Algol
  15. Swift triggers (#524542) on a Galactic source
  16. IPN Triangulation of GRB 120602A (long/very bright)
  17. GRB 120612A: Swift/UVOT observations
  18. GRB 120612A: Swift-XRT refined Analysis
  19. GRB 120612A: Swift-BAT refined analysis
  20. GRB 120612A: Enhanced Swift-XRT position
  21. GRB 120612A: BOOTES-3 optical upper limit
  22. GRB 120612A: Swift detection of a burst
  23. GRB 120603A: Suzaku WAM observation of the prompt emission
  24. GRB 120519A: Suzaku WAM observation of the prompt emission
  25. GRB 120512A: Suzaku WAM observation of the prompt emission
  26. GRB 120521C: EVLA Localization of Afterglow
  27. GRB 120521C: EVLA 22 GHz Detection
  28. GRB 120521B: Fermi GBM observation
  29. GRB 120521C: Early Tautenburg limits
  30. GRB 120521C: EVLA 22 GHz Upper Limit
  31. GRB 120521A: GROND Upper limits
  32. GRB 120521C: Swift-XRT refined Analysis
  33. GRB 120521C: Swift-BAT refined analysis
  34. GRB 120521C: Swift/UVOT Upper Limits
  35. GRB 120521B: Swift/UVOT Upper Limits
  36. GRB 120521C: MASTER optical limit
  37. GRB 120521B: GROND Upper limits
  38. GRB 120521A: XRT light curve (Correction to GCN 13326)
  39. GRB 120521A: Swift-XRT refined Analysis
  40. GRB 120521C: PAIRITEL NIR Upper Limits
  41. GRB 120521C: Enhanced Swift-XRT position
  42. GRB120521C: Liverpool Telescope observations
  43. GRB 120521C: TAROT Calern observatory optical observations
  44. GRB 120521C: Swift detection of a burst
  45. GRB 120521B: Swift-BAT refined analysis
  46. GRB 120521B: Swift-XRT refined Analysis
  47. Swift starts a new program to find fainter transients
  48. IPN Triangulation of GRB 120519A (short/hard)
  49. GRB 120521A: Swift/UVOT Upper Limits
  50. GRB 120521B: Enhanced Swift-XRT position
  51. GRB 120521A: Swift-BAT refined analysis
  52. GRB 120521B/Fermi Trigger 359284074: early MASTER-ICATE optical limit
  53. GRB120521B: Faulkes Telescope South observations
  54. GRB 120521B: TAROT La Silla observatory optical observations
  55. GRB 120521B: Swift detection of a burst
  56. GRB 120521A: Enhanced Swift-XRT position
  57. GRB 120521A: TAROT La Silla observatory optical observations
  58. GRB 120521A: Swift detection of a short burst
  59. GRB 120514A : Suzaku WAM observation of the prompt emission
  60. Swift Trigger 522245 is a noise fluctuation near IGR J17091-3624
  61. GRB 120514A: Swift/UVOT Upper Limits
  62. GRB 120514A: Swift-XRT refined Analysis
  63. GRB 120514A: Enhanced Swift-XRT position
  64. GRB 120514A: Swift-BAT refined analysis
  65. GRB 120514A: TAROT Calern observatory optical observations
  66. GRB 120514A: Swift detection of a burst
  67. GRB 120510A: Swift XRT and UVOT observations
  68. Fermi/GBM detection of a burst from the magnetar 1E 2259+5
  69. Swift detection of 4U 1630-47
  70. IPN Triangulation of bright GRB 120426A
  71. Swift Trigger 520928 is a noise event
  72. Swift Trigger 520928 is probably not a burst
  73. GRB 120422A: RAPTOR Limits During Gamma-ray Emitting Interval
  74. GRB 120422A GROND observations
  75. GRB 120422A: EVLA Detection
  76. GRB 120422A: Gemini redshift of candidate host
  77. GRB 120422A: Zadko observatory - Gingin optical observations
  78. GRB 120422A: Swift-XRT refined Analysis
  79. GRB 120422A: A Swift/UVOT Detection
  80. GRB 120422A: Enhanced Swift-XRT position
  81. GRB 120422A: Swift-BAT refined analysis
  82. GRB 120422A: Swift detection of a burst
  83. GRB 120419A: Swift-XRT and UVOT observations
  84. Swift Trigger 519874 is a noise event
  85. SGR1806-20, Swift-BAT refined analysis (Trigger 519868)
  86. Swift Trigger 519874 is probably a noise event
  87. Trigger 519868: Swift detection of SGR1806-20
  88. GRB 120404A: optical observations in Mondy observatory
  89. GRB 120404A: optical observations
  90. GRB 120404A, Optical Observations
  91. GRB 120404A: EVLA Detection
  92. GRB120404A: GROND observations show steeply decaying afterglow
  93. GRB120404A: MOA optical observations of the initial rise afterglow
  94. GRB 120404A: VLT/X-shooter redshift confirmation
  95. GRB 120404A: Swift/UVOT Detection
  96. GRB 120403B: Swift-XRT refined Analysis
  97. GRB 120404A: Swift-XRT refined Analysis
  98. GRB 120404A: Swift-BAT refined analysis
  99. GRB 120401A: GROND Detection of an optical/NIR afterglow candidate
  100. GRB 120404A: Enhanced Swift-XRT position

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