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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"

19663 results found.

  1. GRB 070510: Swift detection of a possible burst
  2. GRB070509: Swift-XRT Refined Analysis
  3. GRB 070509, Swift-BAT refined analysis
  4. GRB 070508: Suzaku/WAM observation of the prompt emission
  5. GRB 070509: REM observations
  6. GRB 070509: Swift detection of a burst
  7. GRB 070509: ROTSE-III Optical Limits
  8. GRB070508: Swift/UVOT Observations
  9. GRB 070508, Swift-BAT refined analysis
  10. GRB 070508: Swift-XRT refined analysis
  11. GRB 070508: TAROT La Silla observatory optical observations
  12. GRB 070508: Swift detection of an intense burst with an optical counterpart
  13. GRB070412: MAGIC telescope GeV observation
  14. Swift-BAT trigger 278809 is not a GRB
  15. GRB 070507: Swift detection of a possible cosmic ray shower event or a possible burst
  16. GRB070506: Swift/UVOT Observations
  17. GRB070506: Swift XRT refined analysis
  18. GRB 070506, Swift-BAT Refined Analysis
  19. GRB 070506: Swift detection of a burst with optical afterglow
  20. GRB 070429A: Swift XRT further analysis
  21. GRB 070309: Swift-XRT afterglow confirmation
  22. VLA observation of GRB 070429B
  23. Swift/UVOT observations of GRB070429B
  24. GRB 070429B, Swift-BAT refined analysis
  25. Swift/UVOT observations of GRB070429A
  26. GRB 070429A: Swift XRT refined analysis
  27. GRB 070429A, Swift-BAT refined analysis
  28. GRB 070429B: Swift XRT refined analysis
  29. GRB 070429B: ROTSE-III Optical Limits
  30. GRB 070429B: Swift detection of a short burst
  31. GRB 070429: ROTSE-III Optical Limits
  32. GRB 070429: Swift detection of a burst
  33. GRB 070427, Swift-BAT Refined Analysis
  34. GRB 070427: Swift detection of a burst
  35. GRB070419B: Suzaku WAM observation of the prompt emission
  36. GRB 070411, deep LBT photometry
  37. GRB 070420: pseudo-z~1.56 from spectral parameters of the prompt
  38. GRB 070420 Swift-BAT Refined Analysis
  39. GRB070419A: Kuiper Optical detection
  40. GRB070419a: Swift UVOT observations
  41. GRB 070419A: MARGE Observations
  42. GRB 070420: optical rebrightening observed at Mt. John
  43. GRB 070420: Swift XRT refined analysis
  44. GRB070420: Swift UVOT continuing observations
  45. GRB 070420: Faulkes Telescope South Observations
  46. GBR 070419A: Swift/XRT refined analysis
  47. GRB 070420: TAROT La Silla observatory optical observations
  48. GRB 070420: NIR and optical afterglow confirmed
  49. GRB 070420: Swift detection of a burst with optical afterglow
  50. GRB 070419A: Early Super-LOTIS Observations
  51. GRB 070419B, Swift-BAT refined analysis
  52. GRB 070419A Swift-BAT Refined Analysis
  53. GRB 070419A: RAPTOR Detection of Early Emission
  54. GRB 070419B: Swift XRT refined analysis
  55. GRB 070419A, Optical observations
  56. GRB070419 - SDSS Pre-Burst Observations
  57. GRB 070419A: Faulkes Telescope North Optical Observations
  58. GRB 070419B optical afterglow candidate
  59. GRB 070419B: optical afterglow candidate
  60. GRB070419A, optical observation
  61. GRB070330: Correction to UVOT position
  62. GRB 070419B: Swift detection of a burst
  63. GRB 070419A: ROTSE-III Optical Limits
  64. GRB 070419: Swift detection of a burst
  65. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  66. Trigger 276045: Swift detection of a possible burst
  67. GRB 070406: Swift XRT refined analysis
  68. GRB 070411: TLS data shows plateau, flares
  69. GRB070412: Swift UVOT observations
  70. GRB 070411: Swift/UVOT observations
  71. GRB 070412, Swift-BAT refined analysis
  72. GRB 070412: Swift-XRT refined analysis
  73. GRB 070411: Swift-XRT refined analysis
  74. GRB 070412: Optical observations at Crni Vrh
  75. GRB 070412: Swift-XRT refined position
  76. GRB 070411, Swift-BAT refined analysis
  77. GRB 070412: Swift detection of a burst
  78. GRB 070411: ROTSE-III Detection of Optical Counterpart
  79. GRB 070411: Tautenburg RRM Afterglow Confirmation
  80. GRB 070411: Swift detection of a burst with optical afterglow
  81. GRB 070406: Swift XRT team further analysis
  82. GRB 070406: Astrometrically Refined XRT Position, Unfading Source
  83. GRB 070406, Swift-BAT refined analysis
  84. GRB070406: Swift UVOT observations
  85. GRB 070406: Swift XRT Team analysis - Possible X-ray counterpart
  86. GRB 070406: SARA upper limit
  87. GRB 070406: Xinglong TNT optical Upper Limit
  88. GRB 070406: Swift detection of a burst
  89. INTEGRAL ToO Observation of SGR1806-20
  90. UVOT observations of GRB070330
  91. GRB 070330, Swift-BAT refined analysis
  92. GRB 070330: TAROT La Silla observatory optical observations
  93. GRB 070330: Swift-XRT refined analysis
  94. GRB 070330: Swift detection of a burst
  95. GRB 070328: pseudo-z~2.75 from spectral parameters of the prompt
  96. Konus-Wind observation of GRB 070328
  97. GRB 070328: Swift/UVOT Upper Limits
  98. GRB 070328: Swift/XRT Refined Analysis
  99. GRB 070328, Swift-BAT refined analysis
  100. GRB 070328: Swift detection of a burst

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