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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"

19609 results found.

  1. GRB 070531: Swift-BAT refined analysis
  2. GRB 070531: Swift-XRT position
  3. GRB 070531: Liverpool Telescope Optical Observations
  4. GRB 070531: Swift detection of a burst
  5. Swift/UVOT refined analysis of GRB070529
  6. GRB 070529: MARGE Observations
  7. GRB 070529: Optical aterglow from MIRO
  8. GRB 070529: Swift-XRT refined analysis
  9. GRB 070529, Swift-BAT refined analysis
  10. GRB 070529: Swift detection of a burst with an optical aterglow
  11. GRB 070412: Deep Keck imaging
  12. Swift Triggers 280447, 280450 and 280451 are invalid
  13. Swift trigger 280447 is probably a Galactic transient
  14. GRB 070518: MARGE Observations
  15. GRB 070521: pseudo-z ~ 2.28 from prompt emission spectrum
  16. Konus-Wind observation of GRB 070521
  17. GRB 070521: Swift/UVOT Upper Limits
  18. GRB 070521: Swift-XRT refined analysis
  19. GROND upper limits of GRB 070521
  20. GRB 070521 Milagro GeV/TeV Observations
  21. GRB 070520B: Swift/UVOT Upper Limits
  22. GRB 070521, Swift-BAT refined analysis
  23. GRB 070520A: Swift UVOT Upper Limits
  24. GRB 070520B: Swift-XRT refined analysis
  25. GRB 070521: TAROT La Silla observatory optical observations
  26. GRB070521 - SDSS Pre-Burst Observations
  27. GRB 070521: Swift detection of a burst
  28. GRB 070520B, Swift-BAT refined analysis
  29. GRB 070520A, Swift-BAT refined analysis
  30. GRB 070520A: Swift-XRT refined analysis
  31. GRB 070520B: Swift detection of a burst
  32. GRB 070520: Swift detection of a burst
  33. VLA observation of GRB 070518
  34. GRB 070518: Swift-XRT refined analysis
  35. GRB070518: UVOT refined analysis
  36. GRB 070518, Swift-BAT refined analysis
  37. GRB 070518: Swift detection of a burst with optical afterglow
  38. GRB070517: Swift-XRT Refined Analysis
  39. GRB 070517, Swift-BAT refined analysis
  40. GRB 070517: Swift detection of a burst
  41. GRB 070509: objects inside XRT error circle
  42. GRB 070512: IPN localization and Konus spectrum of a bright burst
  43. GRB 070508: pseudo-z from 4 different spectral analyses
  44. GRB 070509: Swift/UVOT Upper Limits
  45. Konus-Wind and Konus-A observation of GRB 070508
  46. Swift-BAT trigger 278987 is not a GRB
  47. GRB 070510: Swift detection of a possible burst
  48. GRB070509: Swift-XRT Refined Analysis
  49. GRB 070509, Swift-BAT refined analysis
  50. GRB 070508: Suzaku/WAM observation of the prompt emission
  51. GRB 070509: REM observations
  52. GRB 070509: Swift detection of a burst
  53. GRB 070509: ROTSE-III Optical Limits
  54. GRB070508: Swift/UVOT Observations
  55. GRB 070508, Swift-BAT refined analysis
  56. GRB 070508: Swift-XRT refined analysis
  57. GRB 070508: TAROT La Silla observatory optical observations
  58. GRB 070508: Swift detection of an intense burst with an optical counterpart
  59. GRB070412: MAGIC telescope GeV observation
  60. Swift-BAT trigger 278809 is not a GRB
  61. GRB 070507: Swift detection of a possible cosmic ray shower event or a possible burst
  62. GRB070506: Swift/UVOT Observations
  63. GRB070506: Swift XRT refined analysis
  64. GRB 070506, Swift-BAT Refined Analysis
  65. GRB 070506: Swift detection of a burst with optical afterglow
  66. GRB 070429A: Swift XRT further analysis
  67. GRB 070309: Swift-XRT afterglow confirmation
  68. VLA observation of GRB 070429B
  69. Swift/UVOT observations of GRB070429B
  70. GRB 070429B, Swift-BAT refined analysis
  71. Swift/UVOT observations of GRB070429A
  72. GRB 070429A: Swift XRT refined analysis
  73. GRB 070429A, Swift-BAT refined analysis
  74. GRB 070429B: Swift XRT refined analysis
  75. GRB 070429B: ROTSE-III Optical Limits
  76. GRB 070429B: Swift detection of a short burst
  77. GRB 070429: ROTSE-III Optical Limits
  78. GRB 070429: Swift detection of a burst
  79. GRB 070427, Swift-BAT Refined Analysis
  80. GRB 070427: Swift detection of a burst
  81. GRB070419B: Suzaku WAM observation of the prompt emission
  82. GRB 070411, deep LBT photometry
  83. GRB 070420: pseudo-z~1.56 from spectral parameters of the prompt
  84. GRB 070420 Swift-BAT Refined Analysis
  85. GRB070419A: Kuiper Optical detection
  86. GRB070419a: Swift UVOT observations
  87. GRB 070419A: MARGE Observations
  88. GRB 070420: optical rebrightening observed at Mt. John
  89. GRB 070420: Swift XRT refined analysis
  90. GRB070420: Swift UVOT continuing observations
  91. GRB 070420: Faulkes Telescope South Observations
  92. GBR 070419A: Swift/XRT refined analysis
  93. GRB 070420: TAROT La Silla observatory optical observations
  94. GRB 070420: NIR and optical afterglow confirmed
  95. GRB 070420: Swift detection of a burst with optical afterglow
  96. GRB 070419A: Early Super-LOTIS Observations
  97. GRB 070419B, Swift-BAT refined analysis
  98. GRB 070419A Swift-BAT Refined Analysis
  99. GRB 070419A: RAPTOR Detection of Early Emission
  100. GRB 070419B: Swift XRT refined analysis

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