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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"

19668 results found.

  1. Konus-Wind and Konus-A observation of GRB 070508
  2. Swift-BAT trigger 278987 is not a GRB
  3. GRB 070510: Swift detection of a possible burst
  4. GRB070509: Swift-XRT Refined Analysis
  5. GRB 070509, Swift-BAT refined analysis
  6. GRB 070508: Suzaku/WAM observation of the prompt emission
  7. GRB 070509: REM observations
  8. GRB 070509: Swift detection of a burst
  9. GRB 070509: ROTSE-III Optical Limits
  10. GRB070508: Swift/UVOT Observations
  11. GRB 070508, Swift-BAT refined analysis
  12. GRB 070508: Swift-XRT refined analysis
  13. GRB 070508: TAROT La Silla observatory optical observations
  14. GRB 070508: Swift detection of an intense burst with an optical counterpart
  15. GRB070412: MAGIC telescope GeV observation
  16. Swift-BAT trigger 278809 is not a GRB
  17. GRB 070507: Swift detection of a possible cosmic ray shower event or a possible burst
  18. GRB070506: Swift/UVOT Observations
  19. GRB070506: Swift XRT refined analysis
  20. GRB 070506, Swift-BAT Refined Analysis
  21. GRB 070506: Swift detection of a burst with optical afterglow
  22. GRB 070429A: Swift XRT further analysis
  23. GRB 070309: Swift-XRT afterglow confirmation
  24. VLA observation of GRB 070429B
  25. Swift/UVOT observations of GRB070429B
  26. GRB 070429B, Swift-BAT refined analysis
  27. Swift/UVOT observations of GRB070429A
  28. GRB 070429A: Swift XRT refined analysis
  29. GRB 070429A, Swift-BAT refined analysis
  30. GRB 070429B: Swift XRT refined analysis
  31. GRB 070429B: ROTSE-III Optical Limits
  32. GRB 070429B: Swift detection of a short burst
  33. GRB 070429: ROTSE-III Optical Limits
  34. GRB 070429: Swift detection of a burst
  35. GRB 070427, Swift-BAT Refined Analysis
  36. GRB 070427: Swift detection of a burst
  37. GRB070419B: Suzaku WAM observation of the prompt emission
  38. GRB 070411, deep LBT photometry
  39. GRB 070420: pseudo-z~1.56 from spectral parameters of the prompt
  40. GRB 070420 Swift-BAT Refined Analysis
  41. GRB070419A: Kuiper Optical detection
  42. GRB070419a: Swift UVOT observations
  43. GRB 070419A: MARGE Observations
  44. GRB 070420: optical rebrightening observed at Mt. John
  45. GRB 070420: Swift XRT refined analysis
  46. GRB070420: Swift UVOT continuing observations
  47. GRB 070420: Faulkes Telescope South Observations
  48. GBR 070419A: Swift/XRT refined analysis
  49. GRB 070420: TAROT La Silla observatory optical observations
  50. GRB 070420: NIR and optical afterglow confirmed
  51. GRB 070420: Swift detection of a burst with optical afterglow
  52. GRB 070419A: Early Super-LOTIS Observations
  53. GRB 070419B, Swift-BAT refined analysis
  54. GRB 070419A Swift-BAT Refined Analysis
  55. GRB 070419A: RAPTOR Detection of Early Emission
  56. GRB 070419B: Swift XRT refined analysis
  57. GRB 070419A, Optical observations
  58. GRB070419 - SDSS Pre-Burst Observations
  59. GRB 070419A: Faulkes Telescope North Optical Observations
  60. GRB 070419B optical afterglow candidate
  61. GRB 070419B: optical afterglow candidate
  62. GRB070419A, optical observation
  63. GRB070330: Correction to UVOT position
  64. GRB 070419B: Swift detection of a burst
  65. GRB 070419A: ROTSE-III Optical Limits
  66. GRB 070419: Swift detection of a burst
  67. Swift-BAT Trigger 276045 is a Cosmic Ray Shower event
  68. Trigger 276045: Swift detection of a possible burst
  69. GRB 070406: Swift XRT refined analysis
  70. GRB 070411: TLS data shows plateau, flares
  71. GRB070412: Swift UVOT observations
  72. GRB 070411: Swift/UVOT observations
  73. GRB 070412, Swift-BAT refined analysis
  74. GRB 070412: Swift-XRT refined analysis
  75. GRB 070411: Swift-XRT refined analysis
  76. GRB 070412: Optical observations at Crni Vrh
  77. GRB 070412: Swift-XRT refined position
  78. GRB 070411, Swift-BAT refined analysis
  79. GRB 070412: Swift detection of a burst
  80. GRB 070411: ROTSE-III Detection of Optical Counterpart
  81. GRB 070411: Tautenburg RRM Afterglow Confirmation
  82. GRB 070411: Swift detection of a burst with optical afterglow
  83. GRB 070406: Swift XRT team further analysis
  84. GRB 070406: Astrometrically Refined XRT Position, Unfading Source
  85. GRB 070406, Swift-BAT refined analysis
  86. GRB070406: Swift UVOT observations
  87. GRB 070406: Swift XRT Team analysis - Possible X-ray counterpart
  88. GRB 070406: SARA upper limit
  89. GRB 070406: Xinglong TNT optical Upper Limit
  90. GRB 070406: Swift detection of a burst
  91. INTEGRAL ToO Observation of SGR1806-20
  92. UVOT observations of GRB070330
  93. GRB 070330, Swift-BAT refined analysis
  94. GRB 070330: TAROT La Silla observatory optical observations
  95. GRB 070330: Swift-XRT refined analysis
  96. GRB 070330: Swift detection of a burst
  97. GRB 070328: pseudo-z~2.75 from spectral parameters of the prompt
  98. Konus-Wind observation of GRB 070328
  99. GRB 070328: Swift/UVOT Upper Limits
  100. GRB 070328: Swift/XRT Refined Analysis

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