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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"

20523 results found.

  1. IGR J08408-4503 (= V* LM Vel): Swift detection of a transient
  2. GRB 060928: Swift observations
  3. GRB 060928: RHESSI Spectral Fit
  4. IPN triangulation of GRB060928 (long, exceptionally bright)
  5. GRB 060930: near-IR afterglow candidate
  6. GRB 061002: Swift-XRT Team Refined Analysis
  7. VLA observations of GRB 060926
  8. GRB061002 - SDSS Pre-Burst Observations
  9. GRB 060908: Detection of a possible host
  10. GRB 060807: Detection of a possible host galaxy
  11. GRB 060923A: VLA K-band Observations
  12. GRB 060930: Xinglong TNT optical observations
  13. GRB 060929: Swift/UVOT Optical Observations
  14. GRB 060929: TNG K-band observations
  15. GRB060929: Optical limit
  16. Liverpool Telescope observations of GRB 060929
  17. GRB060908: optical observations
  18. GRB 060927: Swift/UVOT Optical Observations
  19. GRB 060927: Swift XRT Team refined analysis
  20. GRB 060927 optical limit
  21. GRB 060927: Xinglong TNT optical observations
  22. GRB 060927, optical observation
  23. GRB 060926: MASTER: first minutes decay
  24. GRB060927 - SDSS Pre-Burst Observations
  25. GRB 060926: Swift-UVOT Detections
  26. GRB 060926: OPTIMA-Burst -- further observations
  27. GRB 060923A: Radio Observations
  28. GRB 060926: RTT150, UVOT afterglow candidate confirmation
  29. GRB 060923C: VLA Observation
  30. GRB 060923C: NIR afterglow confirmed
  31. GRB060923C: AROMA optical obsevation
  32. GRB 060923C, optical observation
  33. GRB 060923C: VLT J-band observations
  34. GRB 060923A: Keck and Gemini Observations
  35. GRB 060923C: Xinglong TNT optical observations
  36. GRB 060923C: Swift detection of a burst
  37. GRB 060923B: Swift detection of a burst
  38. GRB 060923: UKIRT nIR observations - candidate afterglow
  39. GRB060923 - SDSS Pre-Burst Observations
  40. GRB 060923: Swift detection of a burst
  41. GRB 060919 : Faulkes South Telescope Observations
  42. GRB 060919, Swift-BAT refined analysis
  43. GRB060919: XRT refined analysis
  44. GRB 060919: TAROT optical observations
  45. GRB 060912A: VLA Observation
  46. GRB 060912A: Probable Host Galaxy
  47. GRB 060912: Correction to GCN 5559
  48. VLA observations of GRB 060908
  49. GRB 060908 - SDSS Pre-burst Observations
  50. GRB 060904B: Kiso Optical observation
  51. GRB 060904A : Optical limit
  52. GRB 060908: REM optical prompt observation
  53. GRB 060908: Swift detection of a burst with a bright optical counterpart
  54. GRB060906 , optical observation
  55. GRB 060906: Early RAPTOR optical limits
  56. GRB 060906, Swift-BAT refined spectral analysis
  57. GRB 060906: Swift/XRT Refined Analysis
  58. GRB 060906, Swift-BAT refined analysis
  59. GRB 060906: Confirmation of P60 Optical Afterglow
  60. GRB 060906 (?): P60 Optical Afterglow Candidate
  61. GRB060904b, optical observations
  62. GRB 060904b: SMARTS optical/IR afterglow observations
  63. GRB060904A: Swift/UVOT optical observations
  64. GRB 060904A: Subaru NIR observation
  65. GRB 060904A: Refined analysis of the Swift-BAT burst
  66. GRB 060904A: Suzaku-XIS and -HXD observation plan
  67. GRB 060904A: P60 Observations
  68. GRB 060904B: TAROT optical counterpart observations
  69. GRB060904B - SDSS Pre-Burst Observations
  70. GRB 060904: TAROT optical observations
  71. GRB 060904B: Swift detection of a burst with optical counterpart
  72. GRB060904 - SDSS Pre-Burst Observations
  73. GRB 060904: Swift detection of a bright burst
  74. GRB060901: Optical observations
  75. 060901: Swift UVOT followup observations
  76. GRB 060901: Swift/XRT Refined Analysis
  77. GRB 060605, observations using an Integral Field Unit
  78. GRB 060604: VLA Observation
  79. GRB 060605: VLA Observation
  80. GRB 060707: VLA observation
  81. GRB 060825: VLA observations
  82. GRB060826 - SDSS Pre-Burst Observations
  83. GRB 060826(?): Swift detection of a possible burst
  84. GRB 060825: XRT Team Refined Analysis
  85. GRB 060825: Swift-BAT Refined Analysis
  86. GRB 060825: TNG optical observations
  87. GRB 060825: TAROT optical observations
  88. GRB 060825: P60 Observations
  89. GRB 060729, SMARTS optical/IR observations
  90. Konus-Wind observation of GRB 060814
  91. GRB 060814: P60 Observations
  92. GRB 060814: P200 NIR Observations
  93. GRB 060814: Swift XRT refined analysis
  94. GRB 060814: VLT optical limits
  95. GRB 060814 - SDSS Pre-Burst Observations
  96. GRB 060814: TAROT optical observations
  97. GRB 060814: Swift detection of a bright burst
  98. GRB 060813: Swift XRT refined analysis
  99. GRB 060813: Swift detection of a burst
  100. GRB051109B: Late-time Radio Observations

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