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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"

19611 results found.

  1. GRB 130701A: Swift detection of a burst
  2. GRB 130627B, Swift-BAT refined analysis
  3. GRB 130627A, Swift-BAT refined analysis
  4. GRB 130627B: Swift/UVOT Upper Limits
  5. GRB 130627A: Swift/UVOT Upper Limits
  6. GRB 130627A: Swift-XRT refined Analysis
  7. GRB 130627B: Possible Swift-XRT afterglow detection
  8. Swift trigger 559221 is likely a false trigger coincident with IGR J17544-2619
  9. GRB 130627A: Enhanced Swift-XRT position
  10. GRB 130626A: RATIR Optical Observations
  11. GRB 130626A, Swift-BAT refined analysis
  12. GRB 130627A: Fermi GBM detection
  13. GRB 130623A: Fermi GBM detection
  14. GRB130627B: Swift/UVOT Observations
  15. GRB 130627B: Swift-XRT observations
  16. GRB 130626A: Swift-XRT possible detection and UVOT upper limits
  17. GRB 130627B: Swift detection of a burst
  18. GRB 130627A: Swift-XRT observations
  19. GRB 130627A: Swift/UVOT Observation
  20. GRB 130627A: Swift detection of a burst
  21. Swift Trigger 559108 is not astrophysical
  22. GRB 130626A: Swift detection of a short burst
  23. GRB 130625A: Swift-XRT refined Analysis
  24. GRB 130625A: MASTER afterglow limit
  25. GRB 130625A: Swift/UVOT Upper Limits
  26. GRB 130623A: Swift-XRT and UVOT observations
  27. GRB 130625A: Swift-BAT refined analysis
  28. GRB 130625A: Enhanced Swift-XRT position
  29. GRB 130625A: Swift detection of a burst
  30. GRB 130603B: First epoch of XMM-Newton observations
  31. GRB 130623A detected in ground analysis of Swift-BAT data
  32. Swift Trigger 558828 is not an interesting event
  33. Swift Trigger 558631: AAO optical observations
  34. GRB 130614A: Suzaku WAM observation of the prompt emission
  35. Swift Trigger 558631 is not a real source
  36. GRB 130612A: Swift-BAT refined analysis
  37. GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations
  38. Fermi/GBM observation of the Soft Gamma Repeater SGR J1550-5418
  39. Trigger 558399: Swift detection of the Soft Gamma Repeater AXP 1E1547.0-5408
  40. Swift Trigger 557910 is not astrophysical
  41. GRB 130615A: Continued Skynet/PROMPT Observations
  42. GRB 130610A: TAROT La Silla observatory optical observations
  43. GRB 130610A: CrAO optical observations
  44. GRB 130615A: Zadko observatory - Gingin optical observations
  45. GRB 130615A: TAROT La Silla observatory optical observations
  46. GRB 130615A: Swift-XRT refined Analysis
  47. GRB 130615A: Swift/UVOT Upper Limits
  48. GRB 130615A: Skynet/PROMPT Observations
  49. GRB 130615A: Enhanced Swift-XRT position
  50. GRB 130615A: Swift-BAT refined analysis
  51. GRB 130615A: GROND afterglow candidate
  52. GRB 130615A: Swift detection of a burst
  53. GRB 130612A: Fermi GBM observation
  54. GRB 130603B: Detection of possible afterglow/kilonova in HST observations
  55. GRB 130606B: Suzaku WAM observation of the prompt emission
  56. GRB 130612A: ISON-NM optical observations
  57. GRB 130612A: Swift/UVOT Detection
  58. GRB 130612A: Swift-XRT refined Analysis
  59. GRB 130612A: Zadko observatory - Gingin optical observations
  60. GRB 130612A: Enhanced Swift-XRT position
  61. GRB 130612A: TAROT La Silla observatory optical observations
  62. GRB 130612A: RATIR Optical Observations
  63. GRB 130612A: P60 Observations
  64. GRB 130612A: Skynet/PROMPT detection of the optical afterglow
  65. GRB 130612A: PAIRITEL NIR Afterglow Observations
  66. GRB 130612A: Liverpool Telescope Afterglow detection
  67. GRB 130612A: Swift detection of a burst with an optical counterpart
  68. GRB 130609A: Swift/UVOT Upper Limits
  69. GRB 130608A: Swift/UVOT Upper Limits
  70. GRB 130609B: Fermi GBM observation
  71. GRB 130609B, Further Swift-BAT refined analysis
  72. GRB 130609B: GROND observations
  73. GRB 130606A: CrAO optical upper limit
  74. GRB 130609A: Radio Observations (5.8, 22 and 85 GHz)
  75. GRB 130609B, Swift-BAT refined analysis
  76. GRB 130610A: ISON-NM optical observations
  77. GRB 130610A: Swift/UVOT Observations
  78. GRB 130610A: Fermi GBM Observation
  79. GRB 130609B: Swift/UVOT Observations
  80. Konus-Wind observation of GRB 130609B
  81. GRB 130606B: Swift/UVOT Upper Limit
  82. GRB 130610A: Swift-XRT refined Analysis
  83. GRB 130609B: Swift-XRT refined Analysis
  84. GRB 130610A: Enhanced Swift-XRT position
  85. GRB 130608A: Further Swift-BAT analysis
  86. GRB 130610A, Swift-BAT refined analysis
  87. GRB 130609B: Enhanced Swift-XRT position
  88. GRB 130610A: P60 Observations
  89. GRB 130610A: PAIRITEL NIR Afterglow Observations
  90. GRB 130610A: Skynet/PROMPT detection of the optical afterglow
  91. GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation
  92. GRB 130610A: Swift detection of a burst with an optical counterpart
  93. GRB 130609B: Swift detection of a burst with an optical counterpart
  94. GRB 130609A: Fermi GBM observation
  95. GRB 130608A: Swift-XRT refined Analysis
  96. GRB 130609A: Swift-XRT refined Analysis
  97. GRB 130608A: RATIR Optical and NIR Observations
  98. GRB 130609A: Enhanced Swift-XRT position
  99. GRB 130609A, Swift-BAT refined analysis
  100. GRB 130608A: Swift-BAT refined analysis

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