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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"

28099 results found.

  1. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  2. GRB 100413A: Radio Afterglow Detection with the EVLA
  3. GRB 100414A: Suzaku WAM observation of the prompt emission
  4. GRB 100414A: Swift/UVOT Observations
  5. GRB 100414A: GROND Detection of the Optical Afterglow
  6. GRB 100414A: Gemini-N candidate and redshift
  7. GRB 100414A: Enhanced Swift-XRT position of candidate afterglow
  8. GRB 100413A: Suzaku WAM observation of the prompt emission
  9. GRB 100414A: Palomar Transient Factory Observations
  10. GRB 100413B: Swift Confirmation of Burst
  11. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  12. GRB 100413A: Swift-BAT final refined analysis
  13. GRB 100414A: Fermi GBM detection
  14. GRB100414A: Fermi LAT detection
  15. GRB 100413A: GROND Upper limits
  16. GRB 100413A: Swift/UVOT Upper Limits
  17. Konus-Wind observation of GRB 100413A
  18. GRB 100413A: Faulkes Telescope South observations
  19. GRB 100413A: SARA upper limit
  20. GRB 100413A: Swift-XRT Refined Analysis
  21. GRB 100413A: Swift-BAT initial refined analysis
  22. GRB 100413A: Enhanced Swift-XRT position
  23. GRB 100413A: Swift detection of a burst
  24. Spin down rate and inferred dipole magnetic field of the new soft gamma-ray repeater SGR 1833-0832
  25. Trigger 419015 is probably not a GRB
  26. GRB100401A: GROND Upper Limits
  27. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  28. GRB 100331B: GROND Upper limits
  29. GRB 100401A: Fermi GBM detection
  30. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  31. GRB 100331B: BOOTES-3 observations
  32. GRB 100324B: Suzaku WAM observation of the prompt emission
  33. GRB 100331B: Swift/UVOT Upper Limits
  34. GRB 100331B: Swift/XRT possible afterglow candidate
  35. Swift detection of LS V +44 17
  36. GRB 100331B: SuperAGILE Localization of a Long GRB
  37. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  38. GRB 100331A: BOOTES-3 observations
  39. GRB 100331A: A long GRB detected by INTEGRAL
  40. GRB 100322A: Suzaku WAM observation of the prompt emission
  41. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  42. GRB 100325A: Fermi LAT detection
  43. GROND observations of GRB100316D/SN2010bh
  44. GRB 100325A: Fermi GBM detection
  45. GRB 100324A: GROND observations
  46. GRB 100324A found in ground analysis of BAT data
  47. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  48. SGR 1833-0832: Swift/UVOT Upper Limits
  49. GRB 100322A: Fermi GBM detection
  50. SGR 1833-0832: Archival Chandra Observations
  51. Discovery of the Spin Period of SGR 1833-0832
  52. GRB 100316D: ATCA radio observations
  53. Probable SGR 1833-0832: Swift-XRT refined analysis
  54. Probable SGR 1833-0832: Enhanced Swift-XRT position
  55. Swift-BAT refined analysis of the probable new SGR 1833-0832
  56. GRB 100219A: MASTER-Net optical alert observations
  57. GRB 100319A: Swift detection of a burst; possible SGR
  58. GRB 100316D: Possible Supernova
  59. GRB 100219A: optical upper limit
  60. GRB 100316A: optical observations in CrAO
  61. GRB 100316D: Swift/UVOT Observations
  62. GRB 100316D: Swift XRT enhanced position and further refined analysis
  63. GRB 100316B: Swift-XRT refined analysis
  64. Tentative redshift of GRB100316D from X-ray data
  65. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  66. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  67. GRB 100316D: Gemini/GMOS and VLT/X-shooter observations
  68. GRB 100316D: VLT/X-shooter observations
  69. GRB 100316D: Swift-BAT refined analysis
  70. GRB100316C: Swift/UVOT Upper Limits
  71. GRB 100316C: Swift-BAT refined analysis
  72. GRB 100316B: Swift/UVOT observations
  73. GRB 100316C: Swift-XRT team refined analysis
  74. GRB 100316C: Enhanced Swift-XRT position
  75. GRB 100316D: Swift XRT refined analysis
  76. GRB 100316A: TAROT Calern observatory optical observations
  77. GRB 100316A: Swift-XRT refined analysis
  78. GRB 100316B: Enhanced Swift-XRT position
  79. GRB 100316A: Swift-BAT refined analysis
  80. GRB 100316B: Swift-BAT refined analysis
  81. GRB100316A: Swift/UVOT Upper Limits
  82. Trigger 416140 is almost certainly not a GRB
  83. GRB 100316C: BOOTES-3 observations
  84. GRB 100316D: Swift detection of a burst
  85. GRB 100316B: GROND Detection of the Optical/NIR Afterglow Candidate
  86. XRF 100315A: MAXI/GSC detection of a short X-ray transient
  87. GRB 100316C: Swift detection of a burst
  88. GRB 100316A: Enhanced Swift-XRT position
  89. GRB 100316B: Swift detection of a burst with optical counterpart
  90. GRB100305A: Optical upper limits at IAO
  91. GRB 100305A: Super-LOTIS early observations
  92. GRB100302A : LOAO observations and Lulin afterglow analysis
  93. GRB 100305A, Swift-BAT refined analysis
  94. GRB 100305A: Swift/UVOT Upper Limits
  95. GRB 100305A: Swift-XRT refined analysis
  96. GRB 100305A Optical Observations
  97. GRB 100305A: Enhanced Swift-XRT position
  98. GRB 100305A: Gemini-N OT candidate
  99. GRB 100305A: PAIRITEL NIR Upper Limits
  100. GRB 100305A: P60 Observations

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