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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"

36313 results found.

  1. GRB 100418A: Swift-BAT refined analysis
  2. GRB 100418A: Enhanced Swift-XRT position
  3. GRB 100418A: ROTSE-III Optical Limits
  4. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  5. GRB 100413A: Radio Afterglow Detection with the EVLA
  6. GRB 100414A: Suzaku WAM observation of the prompt emission
  7. GRB 100414A: Swift/UVOT Observations
  8. GRB 100414A: Gemini-N observation (correction)
  9. GRB 100414A: GROND Detection of the Optical Afterglow
  10. GRB 100414A: Gemini-N candidate and redshift
  11. GRB 100414A: Enhanced Swift-XRT position of candidate afterglow
  12. GRB 100413A: Suzaku WAM observation of the prompt emission
  13. GRB 100414A: Palomar Transient Factory Observations
  14. GRB 100413B: Swift Confirmation of Burst
  15. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  16. GRB 100413A: Swift-BAT final refined analysis
  17. GRB 100414A: IPN Localization
  18. Konus-Wind observation of GRB 100414A (correction to GCN 10597)
  19. Konus-Wind observation of GRB 100414B
  20. GRB 100415A: MAXI/GSC detection of a probable GRB
  21. GRB 100414A: Fermi GBM detection
  22. GRB100414A: Fermi LAT detection
  23. GRB 100413B : Swift detection of a burst
  24. GRB 100413A: GROND Upper limits
  25. GRB 100413A: Swift/UVOT Upper Limits
  26. Konus-Wind observation of GRB 100413A
  27. GRB 100413A: Faulkes Telescope South observations
  28. Tentative redshift of GRB100413A from X-ray data
  29. GRB 100413A: SARA upper limit
  30. GRB 100413A: Swift-XRT Refined Analysis
  31. GRB 100413A: Swift-BAT initial refined analysis
  32. GRB 100413A: Enhanced Swift-XRT position
  33. GRB 100413: xinglong TNT optical upper limit
  34. GRB 100413A: MASTER-Net optical observations
  35. GRB 100413A: Swift detection of a burst
  36. Swift-BAT trigger 419015 is not astrophysical
  37. Trigger 419015 is probably not a GRB
  38. GRB100401A: GROND Upper Limits
  39. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  40. IBAS Alert n. 5996: not a GRB
  41. IBAS Alert n. 5995: not a GRB
  42. GRB 100331B: GROND Upper limits
  43. GRB 100401A: Swift/UVOT Upper Limit
  44. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  45. GRB 100401A: Fermi GBM detection
  46. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  47. GRB 100331B: BOOTES-3 observations
  48. GRB 100316A: R-band limit
  49. GRB 100324B: Suzaku WAM observation of the prompt emission
  50. GRB 100331B: Swift/UVOT Upper Limits
  51. GRB 100331B: Swift/XRT possible afterglow candidate
  52. GRB 100331B: SuperAGILE Localization of a Long GRB
  53. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  54. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  55. GRB 100331A: BOOTES-3 observations
  56. Konus-Wind observation of GRB 100324B
  57. GRB 100331A: A long GRB detected by INTEGRAL
  58. IPN triangulation of GRB100324B
  59. Konus-Wind observation of GRB 100322A
  60. GRB 100322A: Suzaku WAM observation of the prompt emission
  61. GRB 100325A: Fermi LAT detection
  62. GROND observations of GRB100316D/SN2010bh
  63. GRB 100325A: Fermi GBM detection
  64. GRB 100324A: GROND observations
  65. GRB 100324A found in ground analysis of BAT data
  66. Emerging Supernova in the Afterglow of GRB 100316D
  67. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  68. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  69. GRB 100322A: Fermi GBM detection
  70. GRB 100316D: ATCA radio observations
  71. GRB 100319A: correction to GCN 10527
  72. Probable SGR 1833-0832: Swift-XRT refined analysis
  73. GRB 100219A: MASTER-Net optical alert observations
  74. GRB 100319A: Swift detection of a burst; possible SGR
  75. GRB 100316D: Possible Supernova
  76. GRB 100316D: Pre-burst emission measured by BAT
  77. GRB 100316D: Further Gemini observations
  78. GRB 100219A: optical upper limit
  79. GRB 100316A: optical observations in CrAO
  80. GRB 100316D: Swift/UVOT Observations
  81. GRB 100316D: Swift XRT enhanced position and further refined analysis
  82. GRB 100316B: Swift-XRT refined analysis
  83. Tentative redshift of GRB100316D from X-ray data
  84. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  85. Trigger 416226 is probably not a GRB
  86. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  87. GRB 100316D: Gemini/GMOS and VLT/X-shooter observations
  88. GRB 100316D: VLT/X-shooter observations
  89. GRB 100316D: Swift-BAT refined analysis
  90. GRB100316C: Swift/UVOT Upper Limits
  91. GRB 100316C: Swift-BAT refined analysis
  92. GRB 100316B: Swift/UVOT observations
  93. GRB 100316C: Swift-XRT team refined analysis
  94. GRB 100316C: Enhanced Swift-XRT position
  95. GRB 100316D: Swift XRT refined analysis
  96. GRB 100316A: TAROT Calern observatory optical observations
  97. GRB 100316A: Swift-XRT refined analysis
  98. GRB 100316B: Enhanced Swift-XRT position
  99. GRB 100316A: Swift-BAT refined analysis
  100. GRB 100316B: Swift-BAT refined analysis

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