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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"

36215 results found.

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

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