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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"

28111 results found.

  1. GRB 100418A: SMA submm detection
  2. GRB 100420A: Swift detection of a burst
  3. GRB 100418A PAIRITEL NIR Observations
  4. GRB 100418A: Swift/UVOT Observations
  5. GRB 100418A: Gemini-N redshift confirmation
  6. GRB 100418A: Swift-XRT Refined Analysis
  7. GRB100418A: VLT/X-shooter redshift and photometry
  8. GRB 100418A: SARA observations
  9. GRB 100418A: GROND observations; missing author list added
  10. GRB 100418A: GROND observations
  11. GRB 100418A: Swift-BAT refined analysis
  12. GRB 100418A: Enhanced Swift-XRT position
  13. GRB 100418A: Swift detection of a burst with a possible optical afterglow
  14. GRB 100413A: Radio Afterglow Detection with the EVLA
  15. GRB 100414A: Suzaku WAM observation of the prompt emission
  16. GRB 100414A: Swift/UVOT Observations
  17. GRB 100414A: GROND Detection of the Optical Afterglow
  18. GRB 100414A: Gemini-N candidate and redshift
  19. GRB 100414A: Enhanced Swift-XRT position of candidate afterglow
  20. GRB 100413A: Suzaku WAM observation of the prompt emission
  21. GRB 100414A: Palomar Transient Factory Observations
  22. GRB 100413B: Swift Confirmation of Burst
  23. GRB 100414A: Swift-XRT detection of a possible X-ray afterglow
  24. GRB 100413A: Swift-BAT final refined analysis
  25. GRB 100414A: Fermi GBM detection
  26. GRB100414A: Fermi LAT detection
  27. GRB 100413A: GROND Upper limits
  28. GRB 100413A: Swift/UVOT Upper Limits
  29. Konus-Wind observation of GRB 100413A
  30. GRB 100413A: Faulkes Telescope South observations
  31. GRB 100413A: SARA upper limit
  32. GRB 100413A: Swift-XRT Refined Analysis
  33. GRB 100413A: Swift-BAT initial refined analysis
  34. GRB 100413A: Enhanced Swift-XRT position
  35. GRB 100413A: Swift detection of a burst
  36. Spin down rate and inferred dipole magnetic field of the new soft gamma-ray repeater SGR 1833-0832
  37. Trigger 419015 is probably not a GRB
  38. GRB100401A: GROND Upper Limits
  39. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  40. GRB 100331B: GROND Upper limits
  41. GRB 100401A: Fermi GBM detection
  42. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  43. GRB 100331B: BOOTES-3 observations
  44. GRB 100324B: Suzaku WAM observation of the prompt emission
  45. GRB 100331B: Swift/UVOT Upper Limits
  46. GRB 100331B: Swift/XRT possible afterglow candidate
  47. Swift detection of LS V +44 17
  48. GRB 100331B: SuperAGILE Localization of a Long GRB
  49. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  50. GRB 100331A: BOOTES-3 observations
  51. GRB 100331A: A long GRB detected by INTEGRAL
  52. GRB 100322A: Suzaku WAM observation of the prompt emission
  53. Fermi/GBM and Swift/BAT detection of a burst from SGR 1806-20
  54. GRB 100325A: Fermi LAT detection
  55. GROND observations of GRB100316D/SN2010bh
  56. GRB 100325A: Fermi GBM detection
  57. GRB 100324A: GROND observations
  58. GRB 100324A found in ground analysis of BAT data
  59. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  60. SGR 1833-0832: Swift/UVOT Upper Limits
  61. GRB 100322A: Fermi GBM detection
  62. SGR 1833-0832: Archival Chandra Observations
  63. Discovery of the Spin Period of SGR 1833-0832
  64. GRB 100316D: ATCA radio observations
  65. Probable SGR 1833-0832: Swift-XRT refined analysis
  66. Probable SGR 1833-0832: Enhanced Swift-XRT position
  67. Swift-BAT refined analysis of the probable new SGR 1833-0832
  68. GRB 100219A: MASTER-Net optical alert observations
  69. GRB 100319A: Swift detection of a burst; possible SGR
  70. GRB 100316D: Possible Supernova
  71. GRB 100219A: optical upper limit
  72. GRB 100316A: optical observations in CrAO
  73. GRB 100316D: Swift/UVOT Observations
  74. GRB 100316D: Swift XRT enhanced position and further refined analysis
  75. GRB 100316B: Swift-XRT refined analysis
  76. Tentative redshift of GRB100316D from X-ray data
  77. GRB 100316C: GROND Detection of a Optical/NIR Afterglow Candidate
  78. GRB 100316D: GROND Detection of the Optical/NIR Afterglow Candidate
  79. GRB 100316D: Gemini/GMOS and VLT/X-shooter observations
  80. GRB 100316D: VLT/X-shooter observations
  81. GRB 100316D: Swift-BAT refined analysis
  82. GRB100316C: Swift/UVOT Upper Limits
  83. GRB 100316C: Swift-BAT refined analysis
  84. GRB 100316B: Swift/UVOT observations
  85. GRB 100316C: Swift-XRT team refined analysis
  86. GRB 100316C: Enhanced Swift-XRT position
  87. GRB 100316D: Swift XRT refined analysis
  88. GRB 100316A: TAROT Calern observatory optical observations
  89. GRB 100316A: Swift-XRT refined analysis
  90. GRB 100316B: Enhanced Swift-XRT position
  91. GRB 100316A: Swift-BAT refined analysis
  92. GRB 100316B: Swift-BAT refined analysis
  93. GRB100316A: Swift/UVOT Upper Limits
  94. Trigger 416140 is almost certainly not a GRB
  95. GRB 100316C: BOOTES-3 observations
  96. GRB 100316D: Swift detection of a burst
  97. GRB 100316B: GROND Detection of the Optical/NIR Afterglow Candidate
  98. XRF 100315A: MAXI/GSC detection of a short X-ray transient
  99. GRB 100316C: Swift detection of a burst
  100. GRB 100316A: Enhanced Swift-XRT position

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