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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"

23623 results found.

  1. GRB 100418A: RTT150 optical observations
  2. GRB100420A: MITSuME optical upper limits
  3. GRB 100420A: Swift/UVOT Upper Limits
  4. GRB 100418A: RTT150 observations during the optical afterglow maximum
  5. GRB 100418A: MASTER-Net optical observations
  6. GRB 100418A: SMA submm detection
  7. GRB 100420A: Swift detection of a burst
  8. GRB 100418A: Swift/UVOT Observations
  9. GRB 100418A: Gemini-N redshift confirmation
  10. GRB 100418A: Swift-BAT refined analysis
  11. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  12. GRB 100414A: Suzaku WAM observation of the prompt emission
  13. GRB 100414A: GROND Detection of the Optical Afterglow
  14. GRB 100414A: Gemini-N candidate and redshift
  15. GRB 100413A: Suzaku WAM observation of the prompt emission
  16. GRB 100413B: Swift Confirmation of Burst
  17. GRB 100413A: Swift-BAT final refined analysis
  18. GRB 100414A: IPN Localization
  19. Konus-Wind observation of GRB 100414B
  20. GRB 100415A: MAXI/GSC detection of a probable GRB
  21. GRB 100414A: Fermi GBM detection
  22. GRB 100413B : Swift detection of a burst
  23. GRB 100413A: GROND Upper limits
  24. Konus-Wind observation of GRB 100413A
  25. GRB 100413A: Faulkes Telescope South observations
  26. GRB 100413A: Swift-BAT initial refined analysis
  27. GRB 100413A: MASTER-Net optical observations
  28. GRB 100413A: Swift detection of a burst
  29. Spin down rate and inferred dipole magnetic field of the new soft gamma-ray repeater SGR 1833-0832
  30. Trigger 419015 is probably not a GRB
  31. GRB100401A: GROND Upper Limits
  32. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  33. MASTER observations on the Swift second trigger on LS V +44 17
  34. GRB 100331B: GROND Upper limits
  35. Master-Net observations on the Swift trigger on LS V +44 17
  36. GRB 100331B: BOOTES-3 observations
  37. GRB 100316A: R-band limit
  38. GRB 100324B: Suzaku WAM observation of the prompt emission
  39. GRB 100331B: Swift/UVOT Upper Limits
  40. Swift detection of LS V +44 17
  41. GRB 100331B: SuperAGILE Localization of a Long GRB
  42. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  43. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  44. GRB 100331A: BOOTES-3 observations
  45. Konus-Wind observation of GRB 100324B
  46. GRB 100331A: A long GRB detected by INTEGRAL
  47. IPN triangulation of GRB100324B
  48. Konus-Wind observation of GRB 100322A
  49. Short X-ray Transient detected by MAXI/GSC
  50. GRB 100322A: Suzaku WAM observation of the prompt emission
  51. GROND observations of GRB100316D/SN2010bh
  52. GRB 100324A: GROND observations
  53. GRB 100324A found in ground analysis of BAT data
  54. Emerging Supernova in the Afterglow of GRB 100316D
  55. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  56. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  57. SGR 1833-0832 is pulsed at 7.56 seconds
  58. SGR 1833-0832 is pulsed at 7.56 seconds
  59. Swift-BAT refined analysis of the probable new SGR 1833-0832
  60. GRB 100219A: MASTER-Net optical alert observations
  61. GRB 100319A: Swift detection of a burst; possible SGR
  62. GRB 100316D: Pre-burst emission measured by BAT
  63. GRB 100316D: Swift/UVOT Observations
  64. GRB 100316D: Swift XRT enhanced position and further refined analysis
  65. GRB 100316B: Swift-XRT refined analysis
  66. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  67. Trigger 416226 is probably not a GRB
  68. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  69. GRB 100316D: Swift-BAT refined analysis
  70. GRB100316C: Swift/UVOT Upper Limits
  71. GRB 100316C: Swift-BAT refined analysis
  72. GRB 100316C: Swift-XRT team refined analysis
  73. GRB 100316D: Swift XRT refined analysis
  74. GRB 100316A: TAROT Calern observatory optical observations
  75. GRB 100316A: Swift-BAT refined analysis
  76. GRB 100316B: Swift-BAT refined analysis
  77. Trigger 416140 is almost certainly not a GRB
  78. GRB 100316C: BOOTES-3 observations
  79. GRB 100316D: Swift detection of a burst
  80. GRB 100316B: Skynet/PROMPT Observations of Fading
  81. GRB 100316B: GROND Detection of the Optical/NIR Afterglow Candidate
  82. XRF 100315A: MAXI/GSC detection of a short X-ray transient
  83. GRB 100316C: Swift detection of a burst
  84. GRB 100316B: Swift detection of a burst with optical counterpart
  85. GRB 100316A: Swift/UVOT Observations
  86. GRB 100316A: Swift detection of a burst
  87. IBAS Alert 5992 is not a GRB, but XTE J1855-026
  88. GRB100305A: Optical upper limits at IAO
  89. GRB100302A : LOAO observations and Lulin afterglow analysis
  90. GRB 100305A, Swift-BAT refined analysis
  91. GRB 100305A: Swift/UVOT Upper Limits
  92. GRB 100305A: Enhanced Swift-XRT position
  93. GRB 100305A: Swift detection of a burst
  94. GRB 100302A: Swift/UVOT Upper Limits
  95. GRB 100302A: Swift-XRT refined analysis
  96. GRB 100302A: MASTER-Net optical alert observations
  97. GRB 100302A, Swift-BAT refined analysis
  98. GRB 1000302A : A possible afterglow candidate
  99. GRB 100302A: Skynet/DAO Observations
  100. GRB 100302A: Swift detection of a burst

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