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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"

27817 results found.

  1. GRB 100401A: Fermi GBM detection
  2. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  3. GRB 100331B: BOOTES-3 observations
  4. GRB 100331B: Swift/UVOT Upper Limits
  5. GRB 100331B: Swift/XRT possible afterglow candidate
  6. Swift detection of LS V +44 17
  7. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  8. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  9. Short X-ray Transient detected by MAXI/GSC
  10. Fermi GBM detection of four Solar Flares
  11. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  12. GRB 100325A: Fermi LAT detection
  13. GROND observations of GRB100316D/SN2010bh
  14. GRB 100325A: Fermi GBM detection
  15. GRB 100324A: GROND observations
  16. GRB 100324A found in ground analysis of BAT data
  17. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  18. SGR 1833-0832: Swift/UVOT Upper Limits
  19. GRB 100322A: Fermi GBM detection
  20. SGR 1833-0832: Archival Chandra Observations
  21. SGR 1833-0832 is pulsed at 7.56 seconds
  22. SGR 1833-0832 is pulsed at 7.56 seconds
  23. Discovery of the Spin Period of SGR 1833-0832
  24. GRB 100319A: correction to GCN 10527
  25. Probable SGR 1833-0832: Swift-XRT refined analysis
  26. Probable SGR 1833-0832: Enhanced Swift-XRT position
  27. Swift-XRT refined position of the probable new SGR 1833-0832
  28. Swift-BAT refined analysis of the probable new SGR 1833-0832
  29. GRB 100219A: MASTER-Net optical alert observations
  30. GRB 100319A: Swift detection of a burst; possible SGR
  31. GRB 100316D: Pre-burst emission measured by BAT
  32. GRB 100219A: optical upper limit
  33. GRB 100316A: optical observations in CrAO
  34. GRB 100316D: Swift/UVOT Observations
  35. GRB 100316D: Swift XRT enhanced position and further refined analysis
  36. GRB 100316B: Swift-XRT refined analysis
  37. Tentative redshift of GRB100316D from X-ray data
  38. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  39. Trigger 416226 is probably not a GRB
  40. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  41. GRB 100316D: Swift-BAT refined analysis
  42. GRB100316C: Swift/UVOT Upper Limits
  43. GRB 100316C: Swift-BAT refined analysis
  44. GRB 100316B: Swift/UVOT observations
  45. GRB 100316C: Swift-XRT team refined analysis
  46. GRB 100316C: Enhanced Swift-XRT position
  47. GRB 100316D: Swift XRT refined analysis
  48. GRB 100316A: TAROT Calern observatory optical observations
  49. GRB 100316A: Swift-XRT refined analysis
  50. GRB 100316B: Enhanced Swift-XRT position
  51. GRB 100316A: Swift-BAT refined analysis
  52. GRB 100316B: Swift-BAT refined analysis
  53. GRB100316A: Swift/UVOT Upper Limits
  54. Trigger 416140 is almost certainly not a GRB
  55. GRB 100316D: Swift detection of a burst
  56. GRB 100316B: Skynet/PROMPT Observations of Fading
  57. GRB 100316B: GROND Detection of the Optical/NIR Afterglow Candidate
  58. XRF 100315A: MAXI/GSC detection of a short X-ray transient
  59. GRB 100316C: Swift detection of a burst
  60. GRB 100316A: Enhanced Swift-XRT position
  61. GRB 100316B: Swift detection of a burst with optical counterpart
  62. GRB 100316A: Swift/UVOT Observations
  63. GRB 100316A: Swift-XRT detection
  64. GRB 100316A: Swift detection of a burst
  65. GRB100302A : LOAO observations and Lulin afterglow analysis
  66. GRB 100305A, Swift-BAT refined analysis
  67. GRB 100305A: Swift/UVOT Upper Limits
  68. GRB 100305A: Swift-XRT refined analysis
  69. GRB 100305A Optical Observations
  70. GRB 100305A: Enhanced Swift-XRT position
  71. GRB 100305A: PAIRITEL NIR Upper Limits
  72. GRB 100305A: Swift detection of a burst
  73. GRB 100302A: Swift/UVOT Upper Limits
  74. GRB 100302A: Swift-XRT refined analysis
  75. GRB 100302A: Gemini-N OT confirmation
  76. GRB 100302A: Optical observations at Crni Vrh
  77. GRB 100302A: MASTER-Net optical alert observations
  78. GRB 100302A, Swift-BAT refined analysis
  79. GRB 100302A: Enhanced Swift-XRT position
  80. GRB 100302A: Skynet/DAO Observations
  81. GRB 100302A: Swift detection of a burst
  82. GRB 100224B: Fermi GBM detection
  83. GRB 100206A: optical observations in CrAO
  84. GRB 100206A: optical observations in Terskol
  85. GRB 100219A: optical observations
  86. GRB 100224A SHB found in ground analysis of BAT data
  87. GRB 100225A: Fermi LAT detection
  88. GRB 100225A: Fermi GBM detection
  89. GRB 100223A: Fermi GBM detection
  90. Swift Triggers 413744 and 413745 are not GRBs
  91. GRB
  92. GRB 100219A: XRT refined analysis
  93. GRB 100216A: Swift/UVOT Observations
  94. GRB 100219A: GROND observations
  95. GRB 100219A: Enhanced Swift-XRT position
  96. GRB 100219A: Swift/UVOT Detection of the Optical Afterglow
  97. GRB 100216A: XRT Refined Analysis
  98. GRB 100219A: Swift-BAT refined analysis
  99. GRB 100219A: Swift/UVOT Detection of a Source near the XRT Position
  100. GRB 100218A : Fermi GBM detection

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