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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"

37798 results found.

  1. GRB060206: Swift XRT observations of an unbroken powerlaw decay
  2. Konus-Wind observation of bright hard GRB 060213
  3. GRB 060213: IPN localization
  4. GRB 060210: Radio Observations
  5. GRB 060211a: WIRO NIR Observations
  6. GRB060211B: REM optical and NIR observations
  7. GRB 060211B: BAT detects no additional burst emission beyond T + 122 sec
  8. GRB 060211A: Further refined analysis of the Swift burst
  9. GRB060121: optical observations
  10. GRB060110: optical observations
  11. GRB060105: optical observations
  12. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  13. GRB 060211b: P60 Observations
  14. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  15. GRB 060206: SOAR Detections
  16. GRB 050826: Optical Afterglow and Host Galaxy
  17. GRB 060210: Further refined analysis of the Swift-BAT burst
  18. GRB 060211B: Swift/BAT refined analysis
  19. GRB060210: Swift/UVOT Upper Limits
  20. GRB 060211B: Swift-XRT Team refined analysis
  21. GRB060211b: optical observation
  22. GRB060211B: Swift/XRT position
  23. GRB 060210: Optical Observations
  24. GRB060211.7: MASTER_optical_observation under the snow
  25. GRB 060211A: Swift XRT Team Refined Analysis
  26. GRB 060211B: Swift-BAT detection of a burst
  27. GRB060211: Faulkes North observation
  28. GRB 060211: ROTSE-III Optical Limits
  29. GRB 060211: Swift detection of a long burst
  30. GRB 060210: Refined analysis of the Swift-BAT burst
  31. GRB060210: Swift XRT Refined Analysis
  32. GRB060206, optical observations
  33. GRB 060210 : Xinglong and Lulin optical limit
  34. GRB060210: Gemini absorption spectroscopy
  35. GRB060210: Early Optical Observations
  36. GRB 060210: optical evolution
  37. GRB060210:Faulkes Telescope North Afterglow Confirmation
  38. GRB 060210: candidate afterglow
  39. GRB 060210: Swift detection of a burst
  40. GRB060210: Optical afterglow
  41. GRB 060206: Swift/UVOT Observations
  42. Swift-BAT trigger 180931 is not a GRB
  43. GRB060209: RTT150 optical observations
  44. GRB 060209 : TAROT optical observation
  45. GRB060209A: MASTER optical observation
  46. GRB 060209(?): Swift-BAT detection of a possible burst
  47. GRB 060206: near-infrared observations (JK' imaging)
  48. GRB 060206: WSRT Radio Observations
  49. GRB 060203: Swift/UVOT upper limits
  50. GRB 060206: TTT Observations
  51. GRB 060206: More PROMPT Detections
  52. GRB 060121 : WIDGET Pre-trigger limit
  53. GRB 060206: Tenagra II Observations
  54. GRB 060206: PROMPT Detections
  55. Retraction of orphan GRB afterglow candidate
  56. GRB060204a: Swift XRT Source is not GRB Afterglow
  57. GRB 060206: optical observations at Asiago
  58. Orphan GRB Afterglow candidate
  59. GRB 060204b: pseudo-z from spectral parameters of the prompt emission
  60. GRB 060206: Subaru/FOCAS optical spectroscopy
  61. GRB 060206: IR Detection of the Afterglow
  62. GRB 060206: Lick 3m Spectroscopy
  63. GRB 060204A: ROSAT Pointing
  64. GRB 060206: Super-LOTIS observations
  65. GRB060204A: Swift/UVOT observations
  66. GRB 060206: Swift-BAT refined analysis
  67. GRB 060206 : Lulin optical observations
  68. GRB060206: SDSS Pre-Burst Observations
  69. GRB060206: Swift XRT Refined Analysis
  70. GRB060206: Liverpool Telescope observation
  71. GRB 060206: Spectroscopic Redshift
  72. GRB060206: P60 Optical Observations
  73. GRB 060206: KAIT observations
  74. GRB060206: Swift XRT Position
  75. GRB060206: SARA Detection
  76. GRB 060206: RAPTOR observations of afterglow candidate variability.
  77. GRB 060206: High redshift burst
  78. GRB060204a: Swift XRT Detection of an Afterglow Candidate
  79. GRB060206 - Swift UVOT Confirmation of Optical Afterglow
  80. GRB060206: Swift-BAT detection of a burst
  81. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  82. BAT GRB 060204C is probably not a GRB
  83. GRB060204C: optical observation
  84. GRB 060204B: BVRi-band detections of optical afterglow
  85. GRB 060204A: Swift XRT upper limit
  86. GRB 060204A: FRAM optical observations
  87. GRB060204B: Swift/UVOT refined analysis
  88. GRB 060204C: optical observations
  89. Swift XRT Observation of GRB 060204C
  90. GRB 060204B: Swift-BAT refined analysis
  91. GRB 060204B: ART early limit
  92. GRB060204B: Swift XRT Team Refined Analysis
  93. GRB 060204C: OSN limits
  94. GRB 060204b: Keck/LRIS Afterglow Confirmation
  95. GRB 060204C: BOOTES-IR optical limits
  96. GRB 060204C: Liverpool Telescopes optical limit
  97. GRB 060204C: ROTSE-III Optical Limits
  98. GRB 060204C: Swift-BAT detection of a burst
  99. GRB 060124: Radio Observations
  100. GRB060204B: Faulkes OT candidate

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