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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"

19605 results found.

  1. GRB 130925A: Swift detection of a burst
  2. IPN Triangulation of SGR-like burst 130913 - probable association with SGR/AXP 1E1841-045
  3. GRB 130831A: RATIR Confirmation of NIR/Optical Afterglow Flattening
  4. GRB 130907A: Maidanak optical observations
  5. GRB 130912A: AAO optical upper limit
  6. GRB 130831A: Maidanak optical observations, possible emerging Supernova
  7. GRB 130919A: Skynet PROMPT-CTIO optical upper limits
  8. GRB 130919A, Swift-BAT refined analysis
  9. GRB 130913A detected in ground analysis of Swift-BAT data
  10. GRB 130919A: Swift detection of a burst
  11. GRB 130903A: Further Swift XRT observations.
  12. GRB 130606A: Chandra observation
  13. GRB 130912A: Swift/UVOT Upper Limits
  14. GRB 130912A: RATIR Optical and NIR Upper Limits
  15. Konus-Wind observation of GRB 130912A
  16. GRB 130912A: P60 Observations
  17. GRB 130912A: Swift-XRT refined Analysis
  18. GRB 130907A: MASTER refined analysis
  19. GRB 130912A: Fermi GBM detection
  20. GRB 130912A: Skynet DSO-14/Yerkes-41/PROMPT-CTIO observations
  21. GRB 130912A: Enhanced Swift-XRT position
  22. GRB 130912A, Swift-BAT refined analysis
  23. GRB 130912A: GROND observations
  24. GRB 130912A: Swift detection of a short burst
  25. GRB 120419A: Swift XRT confirmation of the afterglow
  26. GRB 130828A: Further Swift XRT observations
  27. GRB 130907A: Further Swift-BAT refined analysis
  28. GRB 130907A: INTEGRAL/SPI-ACS light curve
  29. Konus-Wind observation of GRB 130907A
  30. GRB 130907A, Swift-BAT refined analysis
  31. GRB 130907A: Swift-XRT refined Analysis
  32. GRB 130907A: Enhanced Swift-XRT position
  33. GRB 120916A: Fermi-LAT detection of a burst
  34. GRB 130907A: Swift/UVOT Detection
  35. GRB 130907A: Early Tautenburg detections, red afterglow
  36. GRB 130907A: Skynet DSO-14/Yerkes-41/GORT confirmation of a fading afterglow
  37. GRB 130907A: RATIR Optical and NIR Afterglow Confirmation
  38. GRB 130907A: Skynet DSO-14/Yerkes-41 detections of a possible afterglow
  39. GRB 130831A: Maidanak optical observations
  40. GRB 130831A: optical observation in Chuguev AO
  41. GRB 130831A: ISON-Kislovodsk optical observations
  42. GRB 130831A: optical observation in Gissar AO
  43. GRB 130831A: ISON-UAFO optical observations
  44. GRB 130907A: MASTER early OT observations
  45. GRB 130907A: Swift detection of a burst with an optical counterpart
  46. Swift follow-up results of the possible weak INTEGRAL GRB
  47. GRB 130903A: Swift/UVOT Upper Limits
  48. Swift follow-up of an INTEGRAL possible weak GRB
  49. GRB 130831A: RATIR Optical and NIR Upper Limits
  50. GRB 130903A: Fermi GBM observation
  51. GRB 130903A: Swift-XRT observations
  52. Swift trigger 569022 is a new Galactic source Swift J1734.5-3027
  53. GRB 130831A: Swift/UVOT Observations
  54. GRB 130831A: Montarrenti Observatory optical follow-up
  55. GRB 130831A: RATIR Optical and NIR Observations
  56. GRB 130831A: Continued Skynet/PROMPT-SSO, PROMPT-CTIO and Yerkes-41 detections
  57. GRB 130831B, Swift-BAT refined analysis
  58. GRB 130831A: VLA Observations
  59. GRB 130831A: T100 observations
  60. GRB 130831B: Swift/UVOT Upper Limits
  61. GRB 130831B: GROND upper limits
  62. Swift Trigger 569022: a possible GRB
  63. GRB 130831A: THO optical observation
  64. GRB 130831A, Swift-BAT refined analysis
  65. GRB 130831B: Swift-XRT refined Analysis
  66. GRB 130831A: Swift-XRT refined Analysis
  67. GRB 130831A: Montarrenti Observatory optical observations
  68. GRB 130831B: Enhanced Swift-XRT position
  69. GRB 130831A: Skynet/PROMPT-SSO detections
  70. GRB 130831A: Enhanced Swift-XRT position
  71. Konus-Wind observation of GRB 130831A
  72. GRB 130831B: Swift detection of a burst
  73. GRB 130831A: Faulkes Telescope North and South optical afterglow
  74. GRB 130831A: Swift detection of a burst with an optical counterpart
  75. IPN triangulation of GRB 130828A - error box
  76. GRB 130822A: optical upper limits
  77. GRB 130829A: AAO optical observations
  78. GRB 130828A: Swift XRT and UVOT observations
  79. IPN triangulation of GRB 130828A
  80. GRB 130829A: Swift detection of a burst
  81. GRB 130828A Tiled Swift observations
  82. IPN triangulation of GRB130821A
  83. GRB 130822A Swift-BAT Spectral lag analysis
  84. GRB 130821A: Swift-XRT observation
  85. GRB 130822A: Gemini Observations
  86. GRB 130822A: Swift-XRT refined Analysis
  87. GRB 130822A: Swift/UVOT Upper Limits
  88. GRB 130822A: Enhanced Swift-XRT position
  89. GRB 130822A, Swift-BAT refined analysis
  90. GRB 130821A: Fermi-LAT detection of a burst
  91. GRB 130822A: Swift detection of a short burst
  92. GRB 130816A: Swift/UVOT Upper Limits
  93. GRB 130816B: Swift/UVOT Upper Limits
  94. GRB 130816B, Swift-BAT refined analysis
  95. GRB 130816B: GROND afterglow candidate
  96. GRB 130816A: Swift-XRT refined Analysis
  97. GRB 130816A, Swift-BAT refined analysis
  98. GRB 130816A: Fermi GBM observation
  99. GRB 130816B: Swift-XRT refined Analysis
  100. GRB 130816B: Enhanced Swift-XRT position

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