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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"

45493 results found.

  1. Swift follow-up results of the possible weak INTEGRAL GRB
  2. GRB 130903A: Swift/UVOT Upper Limits
  3. Swift follow-up of an INTEGRAL possible weak GRB
  4. GRB 130831A: RATIR Optical and NIR Upper Limits
  5. GRB 130822A: nearby galaxy redshifts
  6. GRB 130903A: GROND Afterglow Discovery
  7. GRB 130903A: MASTER early optical limit
  8. GRB 130903A: Fermi GBM observation
  9. GRB 130831A: JCMT SCUBA-2 sub-mm observation
  10. GRB 130903A: Swift-XRT observations
  11. Swift trigger 569022 is a new Galactic source Swift J1734.5-3027
  12. GRB 130903A: ISON-Kislovodsk optical Upper Limits
  13. GRB 130903A: GROND Upper Limits
  14. GRB 130903A: A long GRB detected by INTEGRAL
  15. GRB 130831A: Swift/UVOT Observations
  16. GRB 130831A: Montarrenti Observatory optical follow-up
  17. GRB 130831A: Optical Observations via Virtual Telescope, follow-up
  18. GRB 130831A: RATIR Optical and NIR Observations
  19. GRB 130831A: Continued Skynet/PROMPT-SSO, PROMPT-CTIO and Yerkes-41 detections
  20. GRB 130831B, Swift-BAT refined analysis
  21. GRB 130831A: VLA Observations
  22. GRB 130831A: T100 observations
  23. GRB 130831B: Swift/UVOT Upper Limits
  24. GRB 130831A: CARMA mm upper limit
  25. GRB 130831B: GROND upper limits
  26. Swift Trigger 569022: a possible GRB
  27. GRB 130831A: THO optical observation
  28. GRB 130831A, Swift-BAT refined analysis
  29. GRB 130831B: Swift-XRT refined Analysis
  30. GRB 130831A: optical observations
  31. GRB 130831A: Optical Observations via Virtual Telescope
  32. GRB 130831A: Swift-XRT refined Analysis
  33. GRB 130831A: Montarrenti Observatory optical observations
  34. GRB 130831B: Enhanced Swift-XRT position
  35. GRB 130831A: Skynet/PROMPT-SSO detections
  36. GRB 130831A: Enhanced Swift-XRT position
  37. GRB 130831A : Xinglong 60cm optical observation
  38. Konus-Wind observation of GRB 130831A
  39. GRB 130831A: Gemini-North Redshift
  40. GRB 130831A: MITSuME Akeno Optical observation
  41. GRB 130831A: Weihai optical observations
  42. GRB 130831B: Swift detection of a burst
  43. GRB 130831A: Faulkes Telescope North and South optical afterglow
  44. GRB 130831A: Swift detection of a burst with an optical counterpart
  45. IPN triangulation of GRB 130828A - error box
  46. GRB 130822A: optical upper limits
  47. GRB 130829A: AAO optical observations
  48. GRB 130828A: Swift XRT and UVOT observations
  49. GRB 130829A: NOT optical observations
  50. Correction to GCN 15132 - GRB 130828A
  51. IPN triangulation of GRB 130828A
  52. GRB 130829A: Swift detection of a burst
  53. GRB 130828A Tiled Swift observations
  54. GRB 130828A: Fermi GBM detection
  55. GRB 130828A: Fermi-LAT detection of a burst
  56. IPN triangulation of GRB130821A
  57. Konus-Wind observation of GRB 130821A
  58. GRB 130821A: Weihai optical upper limit
  59. GRB 130821A: Swift-XRT observation
  60. GRB 130822A: 5.8 GHz VLA upper limit
  61. GRB 130822A: Gemini Observations
  62. GRB 130822A: Swift-XRT refined Analysis
  63. GRB 130822A: WHT ACAM observations
  64. GRB 130822A: Swift/UVOT Upper Limits
  65. GRB 130822A: Enhanced Swift-XRT position
  66. GRB 130822A, Swift-BAT refined analysis
  67. GRB 130821A: Fermi-LAT detection of a burst
  68. GRB 130822A: Weihai optical upper limit
  69. GRB 130821A: Fermi GBM Detection
  70. GRB 130822A: Swift detection of a short burst
  71. GRB 130816A: Swift/UVOT Upper Limits
  72. GRB 130816B: Swift/UVOT Upper Limits
  73. Fermi Gamma-ray Burst Monitor trigger 398555975 / 130818916 is not a GRB
  74. GRB 130816B, Swift-BAT refined analysis
  75. GRB 130816B: GROND afterglow candidate
  76. GRB 130816A: Swift-XRT refined Analysis
  77. GRB 130816A, Swift-BAT refined analysis
  78. GRB 130816A: Fermi GBM observation
  79. GRB 130816B: Swift-XRT refined Analysis
  80. GRB 130816B: Enhanced Swift-XRT position
  81. GRB 130816A: GROND confirmation of afterglow
  82. GRB 130816A: Enhanced Swift-XRT position
  83. GRB 130816B: Swift detection of a burst
  84. GRB 130816A: REM NIR candidate afterglow
  85. GRB 130816A: Swift detection of a burst
  86. Refined IPN Triangulation of GRB 130812B
  87. Konus-Wind observation of GRB 130812B
  88. IPN Triangulation of GRB 130812B (long/soft)
  89. GRB 130812A: Swift/UVOT Upper Limits
  90. GRB 130812A, Swift-BAT refined analysis
  91. GRB 130812A: GROND upper limits
  92. GRB 130812A: Swift-XRT refined Analysis
  93. GRB 130812A: Enhanced Swift-XRT position
  94. GRB 130812A: Swift detection of a burst
  95. Correction to GCN Circ. 15086 "GRB130807A: Swift/UVOT observations"
  96. GRB130807A: Swift/UVOT observations
  97. GRB 130807A: Swift-XRT refined analysis
  98. GRB 130806A: Swift/UVOT Upper Limits
  99. GRB 130807A, Swift-BAT refined analysis
  100. GRB 130807A: Swift detection of a GRB or Galactic transient

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