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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"

38684 results found.

  1. GRB 060213: optical afterglow candidate
  2. GRB060213: Swift XRT observations and possible afterglow candidate
  3. GRB 060206: Confirmation of Rapid Fading at Optical Wavelengths
  4. GRB060213: MASTER final result
  5. GRB060213:_MASTER_optical_observation
  6. GRB060206: Swift XRT observations of an unbroken powerlaw decay
  7. Konus-Wind observation of bright hard GRB 060213
  8. GRB 060213: IPN localization
  9. GRB 060210: Radio Observations
  10. GRB060211B: REM optical and NIR observations
  11. GRB 060211B: BAT detects no additional burst emission beyond T + 122 sec
  12. GRB 060211A: Further refined analysis of the Swift burst
  13. GRB060121: optical observations
  14. GRB060110: optical observations
  15. GRB060105: optical observations
  16. GRB 060210: ARC NIR Detection of Afterglow and Possible Host Galaxy
  17. GRB 060211b: P60 Observations
  18. GRB 060211A: Partial refined analysis on the Swift-BAT burst
  19. GRB 060206: SOAR Detections
  20. GRB 050826: Optical Afterglow and Host Galaxy
  21. GRB 060210: Further refined analysis of the Swift-BAT burst
  22. GRB 060211B: Swift/BAT refined analysis
  23. GRB060210: Swift/UVOT Upper Limits
  24. GRB 060211B: Swift-XRT Team refined analysis
  25. GRB060211b: optical observation
  26. GRB060211B: Swift/XRT position
  27. GRB 060210: Optical Observations
  28. GRB 060211A: Swift XRT Team Refined Analysis
  29. GRB 060211B: Swift-BAT detection of a burst
  30. GRB060211: Faulkes North observation
  31. GRB 060211: ROTSE-III Optical Limits
  32. GRB 060211: Swift detection of a long burst
  33. GRB 060210: Refined analysis of the Swift-BAT burst
  34. GRB060210: Swift XRT Refined Analysis
  35. GRB 060210 : Xinglong and Lulin optical limit
  36. GRB060210: Optical Observations
  37. GRB060210: Gemini absorption spectroscopy
  38. GRB060210: Early Optical Observations
  39. GRB 060210: optical evolution
  40. GRB 060210: candidate afterglow
  41. GRB 060210: Swift detection of a burst
  42. GRB060210: Optical afterglow
  43. GRB 060206: Swift/UVOT Observations
  44. Swift-BAT trigger 180931 is not a GRB
  45. GRB060209: RTT150 optical observations
  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 060206: Subaru/FOCAS optical spectroscopy
  60. GRB 060206: Lick 3m Spectroscopy
  61. GRB 060206: Super-LOTIS observations
  62. GRB060204A: Swift/UVOT observations
  63. GRB 060206: Swift-BAT refined analysis
  64. GRB 060206 : Lulin optical observations
  65. GRB060206: SDSS Pre-Burst Observations
  66. GRB060206: Swift XRT Refined Analysis
  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. GRB060206 - Swift UVOT Confirmation of Optical Afterglow
  76. GRB060206: Optical afterglow
  77. GRB060206: Swift-BAT detection of a burst
  78. GRB 060204C: XRT analysis of Swift J061223.0+701243.9
  79. GRB060203: WHT Z-band observations
  80. BAT GRB 060204C is probably not a GRB
  81. GRB060204C: optical observation
  82. GRB 060204B: BVRi-band detections of optical afterglow
  83. GRB 060204A: Swift XRT upper limit
  84. GRB060204B: Swift/UVOT refined analysis
  85. GRB 060204C: optical observations
  86. Swift XRT Observation of GRB 060204C
  87. GRB 060204B: Swift-BAT refined analysis
  88. GRB 060204B: ART early limit
  89. GRB060204B: Swift XRT Team Refined Analysis
  90. GRB 060204b: Keck/LRIS Afterglow Confirmation
  91. GRB 060204C: BOOTES-IR optical limits
  92. GRB 060204C: Liverpool Telescopes optical limit
  93. GRB 060204C: ROTSE-III Optical Limits
  94. GRB 060204C: Swift-BAT detection of a burst
  95. GRB 060124: Radio Observations
  96. GRB 060204B: ART optical limit
  97. GRB 060204A: further INTEGRAL results
  98. GRB060204B, optical observation
  99. GRB060204B - SDSS pre-burst observations
  100. GRB 060203: Swift-BAT refined analysis

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