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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"

19666 results found.

  1. GRB 130615A: Swift-XRT refined Analysis
  2. GRB 130615A: Swift/UVOT Upper Limits
  3. GRB 130615A: Skynet/PROMPT Observations
  4. GRB 130615A: Enhanced Swift-XRT position
  5. GRB 130615A: Swift-BAT refined analysis
  6. GRB 130615A: GROND afterglow candidate
  7. GRB 130615A: Swift detection of a burst
  8. GRB 130612A: Fermi GBM observation
  9. GRB 130603B: Detection of possible afterglow/kilonova in HST observations
  10. GRB 130606B: Suzaku WAM observation of the prompt emission
  11. GRB 130612A: ISON-NM optical observations
  12. GRB 130612A: Swift/UVOT Detection
  13. GRB 130612A: Swift-XRT refined Analysis
  14. GRB 130612A: Zadko observatory - Gingin optical observations
  15. GRB 130612A: Enhanced Swift-XRT position
  16. GRB 130612A: TAROT La Silla observatory optical observations
  17. GRB 130612A: RATIR Optical Observations
  18. GRB 130612A: P60 Observations
  19. GRB 130612A: Skynet/PROMPT detection of the optical afterglow
  20. GRB 130612A: PAIRITEL NIR Afterglow Observations
  21. GRB 130612A: Liverpool Telescope Afterglow detection
  22. GRB 130612A: Swift detection of a burst with an optical counterpart
  23. GRB 130609A: Swift/UVOT Upper Limits
  24. GRB 130608A: Swift/UVOT Upper Limits
  25. GRB 130609B: Fermi GBM observation
  26. GRB 130609B, Further Swift-BAT refined analysis
  27. GRB 130609B: GROND observations
  28. GRB 130606A: CrAO optical upper limit
  29. GRB 130609A: Radio Observations (5.8, 22 and 85 GHz)
  30. GRB 130609B, Swift-BAT refined analysis
  31. GRB 130610A: ISON-NM optical observations
  32. GRB 130610A: Swift/UVOT Observations
  33. GRB 130610A: Fermi GBM Observation
  34. GRB 130609B: Swift/UVOT Observations
  35. Konus-Wind observation of GRB 130609B
  36. GRB 130606B: Swift/UVOT Upper Limit
  37. GRB 130610A: Swift-XRT refined Analysis
  38. GRB 130609B: Swift-XRT refined Analysis
  39. GRB 130610A: Enhanced Swift-XRT position
  40. GRB 130608A: Further Swift-BAT analysis
  41. GRB 130610A, Swift-BAT refined analysis
  42. GRB 130609B: Enhanced Swift-XRT position
  43. GRB 130610A: P60 Observations
  44. GRB 130610A: PAIRITEL NIR Afterglow Observations
  45. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  46. GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation
  47. GRB 130610A: Swift detection of a burst with an optical counterpart
  48. GRB 130609B: Swift detection of a burst with an optical counterpart
  49. GRB 130609A: Fermi GBM observation
  50. GRB 130608A: Swift-XRT refined Analysis
  51. GRB 130609A: Swift-XRT refined Analysis
  52. GRB 130608A: RATIR Optical and NIR Observations
  53. GRB 130609A: Enhanced Swift-XRT position
  54. GRB 130609A, Swift-BAT refined analysis
  55. GRB 130608A: Swift-BAT refined analysis
  56. GRB 130608A: Enhanced Swift-XRT position
  57. GRB 130609A: RATIR Optical and NIR Observations
  58. GRB 130609A: Swift detection of a burst
  59. GRB 130608A: Swift detection of a burst
  60. GRB 130606A: Continued Skynet/PROMPT observations
  61. Swift Trigger 557674 was due to an onboard position error
  62. Swift Trigger 557674 is a probable new Galactic transient
  63. GRB 130606B: Swift-XRT observations
  64. GRB 130606A, Swift-BAT refined analysis
  65. GRB 130606A: TAROT Calern observatory early optical observations
  66. GRB 130606A: Skynet/PROMPT detection of the optical afterglow
  67. GRB 130606A: Swift/UVOT Upper Limits
  68. GRB 130603A: AAO optical observations
  69. GRB 130606A: Swift-XRT refined Analysis
  70. GRB 130606A: Enhanced Swift-XRT position
  71. Konus-Wind observation of GRB 130605A
  72. Konus-Wind observation of GRB 130606A
  73. GRB 130606A: GROND Detection of the Optical/NIR Afterglow
  74. GRB 130606A: AAO optical observations
  75. Trigger 557640: Swift detection of burst from SGR J1745-29
  76. GRB 130606A: PAIRITEL NIR Afterglow Observations
  77. GRB 130606A:T100 observations
  78. GRB 130606B: Fermi-LAT detection of a bright hard burst
  79. GRB130606A: Montarrenti Observatory afterglow detection
  80. GRB 130605A: Swift-XRT refined Analysis
  81. GRB 130605A: Swift-BAT refined analysis
  82. Swift Trigger 557466 is not astrophysical
  83. GRB 130606A - Liverpool Telescope Optical Afterglow Confirmation
  84. GRB 130606A: optical afterglow with BOOTES-2/TELMA and 1.23m CAHA
  85. GRB 130606A: Swift detection of a burst
  86. GRB 130605A: Swift/UVOT Detection
  87. GRB 130604A: Swift-BAT refined analysis
  88. GRB 130605A: Continued Skynet/PROMPT observations
  89. GRB 130605A: Skynet/PROMPT detection of a fading afterglow
  90. GRB 130605A: TAROT La Silla observatory optical detection of the afterglow
  91. GRB 130605A: GROND afterglow candidate
  92. GRB 130605A: Swift detection of a burst
  93. Konus-Wind observation of GRB 130603B
  94. GRB 130603B: MASTER-Net early observations and optical sloap limit
  95. GRB 130604A: Swift/UVOT Upper Limits
  96. Swift Trigger 557466 is probably not real.
  97. GRB 130604A: Swift-XRT refined Analysis
  98. GRB 130604A: Enhanced Swift-XRT position
  99. GRB 130604A: Gemini North Spectroscopy
  100. GRB 130603B: P60 Observations

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