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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"

27924 results found.

  1. GRB 120302A found in ground analysis of BAT data
  2. GRB 120229A, Swift-BAT refined analysis
  3. GRB 120229A: Swift detection of a short burst
  4. Konus-Wind observation of GRB 120226A
  5. GRB 120226A: Fermi-LAT data analysis
  6. IPN Triangulation of GRB 120226A
  7. GRB 120224A: VLT/X-shooter observations
  8. GRB 120226A: Fermi-LAT detection of a burst
  9. GRB 120224A: GROND detection of the afterglow candidate
  10. GRB 120224A: Swift-XRT refined Analysis
  11. Swift Trigger 516027 is CC Eri
  12. GRB 120224A: Swift/UVOT Upper Limits
  13. GRB 120224A: Swift-BAT refined analysis
  14. GRB 120224A: FTN optical observations
  15. GRB 120224A: Enhanced Swift-XRT position
  16. GRB 120224A: Swift detection of a burst
  17. GRB 120219A: MASTER prompt and early optical limit and OT discussion
  18. GRB 120219A: 1.23m CAHA optical observations
  19. GRB 120219A, optical observations
  20. GRB 120219A: Swift-XRT refined Analysis
  21. GRB 120219A: Swift/UVOT Upper Limits
  22. GRB 120219A: Swift-BAT refined analysis
  23. GRB 120219A: Enhanced Swift-XRT position
  24. GRB 120219A: MASTER-NET prompt and early optical observations
  25. GRB 120219A: Swift detection of a burst
  26. GRB 120218A: Swift-BAT refined analysis
  27. GRB 120218A: Swift detection of a burst
  28. GRB 120215A: Swift/UVOT Upper Limits
  29. GRB 120215A: Swift-XRT refined Analysis
  30. Fermi GBM detection of an SGR-like burst
  31. GRB 120215A: Enhanced Swift-XRT position
  32. GRB 120215A: Swift-BAT refined analysis
  33. GRB 120215A: Swift detection of a burst
  34. GRB 120213A: Swift-XRT refined Analysis
  35. GRB 120213A: Swift/UVOT Upper Limits
  36. GRB 120212A: Fermi GBM observation
  37. GRB 120213A: Enhanced Swift-XRT position
  38. GRB 120213A: Swift-BAT refined analysis
  39. GRB 120213A: MASTER-NET early optical observations
  40. GRB 120213A: Prompt enhanced Swift-XRT position
  41. GRB 120212A: Swift-XRT refined Analysis
  42. GRB 120213A: Swift detection of a burst
  43. GRB 120212A: Swift/UVOT Detection
  44. GRB 120212A: Swift-BAT refined analysis
  45. GRB 120212A: Enhanced Swift-XRT position
  46. GRB 120212A: Kanata/HOWPol optical observation
  47. GRB 120212A: Swift-XRT observations
  48. GRB 120212A: Swift/UVOT detection
  49. GRB 120211A: GROND Upper limits
  50. GRB 120212A: Swift detection of a burst
  51. GRB 120211A, optical observations
  52. GRB 120211A: Swift-XRT refined Analysis
  53. GRB 120211A: Swift/UVOT Upper Limits
  54. GRB 120211A: MASTER early optical observations
  55. GRB 120211A: Swift-BAT refined analysis
  56. GRB 120211A: Enhanced Swift-XRT position
  57. GRB 120211A - Faulkes Telescope South Observations
  58. GRB 120211A: Swift detection of a burst
  59. LS I +61 303: Swift-BAT refined analysis
  60. GRB 120202A: D50 optical limits
  61. Swift detection of a burst from LS I +61 303
  62. GRB 120202A: GROND observations
  63. GRB 120202A: WHT, Gemini & UKIRT candidate afterglow
  64. GRB 120202A: Swift/XRT and UVOT observations
  65. GRB 111228A: Possible host detected by Swift/UVOT
  66. GRB 120129A: MASTER optical observations
  67. IPN Triangulation of GRB 120129A (long/intense)
  68. GRB 120127A: MAXI/GSC detection of a probable GRB
  69. GRB 120118B: optical upper limit
  70. GRB 120116A: optical upper limit
  71. GRB 120119A: EVLA observations
  72. GRB 120119A: GRT detection of early afterglow
  73. GRB 111225A: optical observations
  74. GRB 120119A: optical upper limit
  75. GRB 120121A: Swift/UVOT Upper Limits
  76. GRB 120121A: Swift-XRT refined Analysis
  77. GRB 120121A: Swift-BAT refined analysis
  78. GRB 120121A: Enhanced Swift-XRT position
  79. GRB 120121A: ISON-NM optical observations
  80. GRB 120121A: Swift-XRT position
  81. GRB 120121A: Swift detection of a burst
  82. GRB 120119A, Swift-BAT refined analysis
  83. GRB 120119A: TAROT La Silla observatory optical observations
  84. GRB120119A: REM NIR observations
  85. GRB 120119A: optical observations
  86. GRB 120119A: Swift/UVOT Observations
  87. GRB 120119A: Swift-XRT refined Analysis
  88. GRB 120119A: Enhanced Swift-XRT position
  89. GRB 120119A: Fermi GBM observation
  90. GRB 120118B, Swift-BAT refined analysis
  91. Konus-Wind observation of GRB 120119A
  92. GRB 120119A: optical observations
  93. GRB 120118B: Swift-XRT refined Analysis
  94. GRB 120118B : Lulin Optical limit
  95. GRB 120119A: GROND Detection of the Optical/NIR Afterglow
  96. GRB 120118B: Swift/UVOT Upper Limits
  97. GRB 120119A: Liverpool Telescope afterglow detection
  98. GRB 120119A: PAIRITEL NIR Detection
  99. GRB 120119A: Swift detection of a burst with an optical counterpart
  100. GRB 120118B: NOT observations

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