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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"

36195 results found.

  1. Konus-Wind observation of GRB 100414B
  2. GRB 100415A: MAXI/GSC detection of a probable GRB
  3. GRB 100414A: Fermi GBM detection
  4. GRB100414A: Fermi LAT detection
  5. GRB 100413B : Swift detection of a burst
  6. GRB 100413A: GROND Upper limits
  7. GRB 100413A: Swift/UVOT Upper Limits
  8. Konus-Wind observation of GRB 100413A
  9. GRB 100413A: Faulkes Telescope South observations
  10. Tentative redshift of GRB100413A from X-ray data
  11. GRB 100413A: SARA upper limit
  12. GRB 100413A: Swift-XRT Refined Analysis
  13. GRB 100413A: Swift-BAT initial refined analysis
  14. GRB 100413A: Enhanced Swift-XRT position
  15. GRB 100413: xinglong TNT optical upper limit
  16. GRB 100413A: MASTER-Net optical observations
  17. GRB 100413A: Swift detection of a burst
  18. Swift-BAT trigger 419015 is not astrophysical
  19. Trigger 419015 is probably not a GRB
  20. GRB100401A: GROND Upper Limits
  21. INTEGRAL Alert n. 5995: MASTER-Net optical observations
  22. IBAS Alert n. 5996: not a GRB
  23. IBAS Alert n. 5995: not a GRB
  24. GRB 100331B: GROND Upper limits
  25. GRB 100401A: Swift/UVOT Upper Limit
  26. Swift/BAT trigger 417974 (GRB100401A): Swift/XRT observations
  27. GRB 100401A: Fermi GBM detection
  28. GRB 100401A Burst, possibly short, detected in ground analysis of BAT data
  29. GRB 100331B: BOOTES-3 observations
  30. GRB 100316A: R-band limit
  31. GRB 100324B: Suzaku WAM observation of the prompt emission
  32. GRB 100331B: Swift/UVOT Upper Limits
  33. GRB 100331B: Swift/XRT possible afterglow candidate
  34. GRB 100331B: SuperAGILE Localization of a Long GRB
  35. INTEGRAL trigger 5994 (GRB100331A): Swift/XRT observations
  36. INTEGRAL trigger 5994 / GRB 100331A: GROND detection of a variable source
  37. GRB 100331A: BOOTES-3 observations
  38. Konus-Wind observation of GRB 100324B
  39. GRB 100331A: A long GRB detected by INTEGRAL
  40. IPN triangulation of GRB100324B
  41. Konus-Wind observation of GRB 100322A
  42. GRB 100322A: Suzaku WAM observation of the prompt emission
  43. GRB 100325A: Fermi LAT detection
  44. GROND observations of GRB100316D/SN2010bh
  45. GRB 100325A: Fermi GBM detection
  46. GRB 100324A: GROND observations
  47. GRB 100324A found in ground analysis of BAT data
  48. Emerging Supernova in the Afterglow of GRB 100316D
  49. GRB 100322B or possible Galactic transient detected in ground analysis of BAT data
  50. GRB 100316D: Spectroscopic Discovery of a Supernova from Magellan
  51. GRB 100322A: Fermi GBM detection
  52. GRB 100316D: ATCA radio observations
  53. GRB 100319A: correction to GCN 10527
  54. Probable SGR 1833-0832: Swift-XRT refined analysis
  55. GRB 100219A: MASTER-Net optical alert observations
  56. GRB 100319A: Swift detection of a burst; possible SGR
  57. GRB 100316D: Possible Supernova
  58. GRB 100316D: Pre-burst emission measured by BAT
  59. GRB 100316D: Further Gemini observations
  60. GRB 100219A: optical upper limit
  61. GRB 100316A: optical observations in CrAO
  62. GRB 100316D: Swift/UVOT Observations
  63. GRB 100316D: Swift XRT enhanced position and further refined analysis
  64. GRB 100316B: Swift-XRT refined analysis
  65. Tentative redshift of GRB100316D from X-ray data
  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: Gemini/GMOS and VLT/X-shooter observations
  70. GRB 100316D: VLT/X-shooter observations
  71. GRB 100316D: Swift-BAT refined analysis
  72. GRB100316C: Swift/UVOT Upper Limits
  73. GRB 100316C: Swift-BAT refined analysis
  74. GRB 100316B: Swift/UVOT observations
  75. GRB 100316C: Swift-XRT team refined analysis
  76. GRB 100316C: Enhanced Swift-XRT position
  77. GRB 100316D: Swift XRT refined analysis
  78. GRB 100316A: TAROT Calern observatory optical observations
  79. GRB 100316A: Swift-XRT refined analysis
  80. GRB 100316B: Enhanced Swift-XRT position
  81. GRB 100316A: Swift-BAT refined analysis
  82. GRB 100316B: Swift-BAT refined analysis
  83. GRB100316A: Swift/UVOT Upper Limits
  84. Trigger 416140 is almost certainly not a GRB
  85. GRB 100316C: BOOTES-3 observations
  86. GRB 100316D: Swift detection of a burst
  87. GRB 100316B: VLT/X-shooter redshift
  88. GRB 100316B: Skynet/PROMPT Observations of Fading
  89. GRB 100316B: GROND Detection of the Optical/NIR Afterglow Candidate
  90. GRB 100316C: Swift detection of a burst
  91. GRB 100316A: Enhanced Swift-XRT position
  92. GRB 100316B: Swift detection of a burst with optical counterpart
  93. GRB 100316 optical candidate from 1.23m CAHA telescope
  94. GRB 100316 optical candidate from 1.23m CAHA telescope
  95. GRB 100316A: Swift/UVOT Observations
  96. GRB 100316A: Swift-XRT detection
  97. GRB 100316A: Swift detection of a burst
  98. IBAS Alert 5992 is not a GRB, but XTE J1855-026
  99. GRB100305A: Optical upper limits at IAO
  100. GRB 100305A: Super-LOTIS early observations

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