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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"

19610 results found.

  1. GRB 060319: Swift detection of a burst
  2. Konus-Wind observation of GRB 060313
  3. GRB 060313: Further analysis of the Swift-BAT bright short hard burst
  4. GRB 060313: Swift/UVOT Observations
  5. GRB 060313: Swift-XRT team refined analysis
  6. GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
  7. GRB 060313: Swift XRT position
  8. GRB060313: optical and near infrared observations with REM
  9. GRB 060313: Swift-BAT detection of a bright short hard burst
  10. GRB060312: Swift UVOT observation
  11. GRB 060312: Refined analysis of the Swift-BAT burst
  12. GRB 060312: Swift XRT team refined analysis
  13. GRB060306: APO Ks-band Imaging Observations
  14. GRB 060312: ROTSE-III Optical Limits
  15. GRB 060312: Swift detection of a burst
  16. Bright short hard GRB 060303: IPN localization and Konus spectrum
  17. GRB060218: analysis of the XMM-Newton observation
  18. Swift/UVOT observations of GRB060306
  19. GRB 060306: Swift-BAT refined analysis
  20. GRB 060306: Swift-XRT team refined analysis
  21. GRB 060306: Swift detection of a bright burst
  22. GRB060218: Ep,i - Eiso correlation
  23. GRB 060223b: Swift/UVOT Upper Limits
  24. GRB 060223B: Swift XRT possible afterglow
  25. GRB 060223B: Swift-BAT refined analysis
  26. GRB 060223a: Swift/UVOT refined analysis
  27. GRB 060223: Swift XRT Team preliminary analysis
  28. GRB 060218/SN 2006aj: Swift-BAT fluence and peak flux
  29. GRB 060223B: Swift detection of a bright burst
  30. GRB 060223: Swift-BAT refined analysis
  31. GRB 060223: Swift/UVOT Confirmation of Optical Afterglow
  32. GRB 060223: Swift detection of a burst
  33. GRB 060219: Swift-BAT refined analysis
  34. GRB 060218: Further refined analysis of the Swift-BAT burst
  35. GRB 060218: Likely an underluminous GRB
  36. GRB 060219: SDSS galaxy inside XRT error circle
  37. GRB060218: UV Detection and Light Curves
  38. GRB 060219: Swift/UVOT Upper Limits
  39. GRB 060219: Swift-XRT Team refined analysis
  40. GRB 051221B: Swift-XRT Team Refined Analysis
  41. GRB 060219: Partial refined analysis of the Swift-BAT burst
  42. GRB 060219: Swift-XRT position typo correction
  43. GRB 060219: Swift-XRT position
  44. GRB 060218: optical/nIR observations at La Palma
  45. GRB 060219: Swift-BAT detection of a weak burst
  46. Oddball GRB 060218, transient or GRB?
  47. GRB060218: Swift/XRT Team preliminary analysis of the possible burst
  48. Brightening of the Optical Counterpart of the Possible GRB 060218
  49. GRB 060218: MDM Observations
  50. GRB 060218A: ROTSE-III Possible Optical Flare
  51. GRB060218: Swift/XRT refined position of a possible burst
  52. Preliminary refined analysis of the Swift-BAT trigger 191157
  53. Further UVOT Observations of the Candidate Optical Afterglow for GRB 060218
  54. GRB 060211B: Swift/UVOT Upper Limits
  55. GRB 060218: Swift XRT Position
  56. GRB 060218: Swift-BAT detection of a possible burst
  57. GRB 060213: optical afterglow not confirmed
  58. Swift UVOT observations of GRB060213
  59. GRB060213: Swift XRT observations and possible afterglow candidate
  60. GRB 060211b: WIRO NIR Observations
  61. GRB060206: Swift XRT observations of an unbroken powerlaw decay
  62. GRB 060213: IPN localization
  63. GRB 060211a: WIRO NIR Observations
  64. GRB 060211B: BAT detects no additional burst emission beyond T + 122 sec
  65. GRB 060211A: Further refined analysis of the Swift burst
  66. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  67. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  68. GRB 050826: Optical Afterglow and Host Galaxy
  69. GRB 060210: Further refined analysis of the Swift-BAT burst
  70. GRB 060211B: Swift/BAT refined analysis
  71. GRB060210: Swift/UVOT Upper Limits
  72. GRB 060211B: Swift-XRT Team refined analysis
  73. GRB060211B: Swift/XRT position
  74. GRB 060210: Optical Observations
  75. GRB 060211A: Swift XRT Team Refined Analysis
  76. GRB 060211B: Swift-BAT detection of a burst
  77. GRB060211: Faulkes North observation
  78. GRB 060211: Swift detection of a long burst
  79. GRB 060210: Refined analysis of the Swift-BAT burst
  80. GRB060210: Swift XRT Refined Analysis
  81. GRB060210: Early Optical Observations
  82. GRB060210:Faulkes Telescope North Afterglow Confirmation
  83. GRB 060210: candidate afterglow
  84. GRB 060210: Swift detection of a burst
  85. GRB060210: Optical afterglow
  86. GRB 060206: Swift/UVOT Observations
  87. Swift-BAT trigger 180931 is not a GRB
  88. GRB060209: RTT150 optical observations
  89. GRB 060209 : TAROT optical observation
  90. GRB 060209(?): Swift-BAT detection of a possible burst
  91. GRB 060206: WSRT Radio Observations
  92. GRB 060203: Swift/UVOT upper limits
  93. GRB060204a: Swift XRT Source is not GRB Afterglow
  94. GRB 060204b: pseudo-z from spectral parameters of the prompt emission
  95. GRB 060204A: ROSAT Pointing
  96. GRB060204A: Swift/UVOT observations
  97. GRB 060206: Swift-BAT refined analysis
  98. GRB060206: Swift XRT Refined Analysis
  99. GRB060206: Swift XRT Position
  100. GRB060204a: Swift XRT Detection of an Afterglow Candidate

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