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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"

32718 results found.

  1. GRB 060926: MASTER: first minutes decay
  2. GRB 060927: optical afterglow confirmation
  3. GRB 060927A: ROTSE-III Detection of Optical Counterpart
  4. GRB060926: VLT redshift
  5. GRB 060926: Swift-UVOT Detections
  6. GRB 060923A: Schedule of Spitzer Space Telescope Observations
  7. GRB 060926: OPTIMA-Burst -- further observations
  8. GRB 060926: Swift XRT refined analysis
  9. GRB 060926, Swift-BAT refined analysis
  10. GRB 060923A: Radio Observations
  11. GRB 060926: MASTER OT alert observation
  12. GRB 060912A: Redshift of probable host galaxy
  13. GRB 060926: BOOTES-IR observations
  14. GRB060926 OPTIMA-Burst optical observation
  15. GRB 060926: MASTER optical observation
  16. GRB 060923C, Swift-BAT refined analysis
  17. GRB 060923C: VLA Observation
  18. GRB 060923C: NIR afterglow confirmed
  19. GRB060923C: AROMA optical obsevation
  20. GRB 060923C: Gemini Observations and Afterglow Candidate
  21. GRB 060923C, optical observation
  22. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  23. GRB 060923C: VLT J-band observations
  24. GRB060923B: Swift/UVOT upper limits
  25. GRB 060923B: Swift XRT Refined Analysis
  26. GRB 060923C: Swift XRT refined analysis
  27. GRB 060923C, Swift-BAT partial refined analysis
  28. GRB 060923A: Swift XRT refined analysis
  29. GRB 060923C: Keck Observations
  30. GRB 060923A: Keck and Gemini Observations
  31. GRB 060923B, Swift-BAT refined analysis
  32. GRB060923C : Faulkes Telescope South optical limits
  33. GRB060923C: Faulkes Telescope North optical observations
  34. GRB 060923C: optical observation
  35. GRB 060923, Swift-BAT refined analysis
  36. GRB 060923: Early Super-LOTIS Observations
  37. GRB 060923: UKIRT nIR observations - candidate afterglow
  38. GRB060923: Faulkes Telescope North optical observations
  39. GRB060923 - SDSS Pre-Burst Observations
  40. GRB 060923: KAIT observations
  41. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  42. GRB060919: Swift/UVOT optical observations
  43. GRB 060919 : Faulkes South Telescope Observations
  44. GRB 060919, Swift-BAT refined analysis
  45. GRB060919: XRT refined analysis
  46. GRB 060912A: VLA Observation
  47. GRB 060912A: Probable Host Galaxy
  48. GRB060825: MAGIC telescope GeV observation
  49. Konus-Wind observation of GRB 060912
  50. GRB 060912: Redshift of nearby 2MASS galaxy
  51. GRB060912: optical observations
  52. GRB060912: Swift/UVOT Observations
  53. GRB060912: OPTIMA-Burst optical observations
  54. GRB 060912: Swift XRT Team Refined Analysis
  55. GRB 060912, Swift-BAT refined analysis
  56. GRB 060912: Correction to GCN 5559
  57. VLA observations of GRB 060908
  58. GRB 060908: redshift
  59. GRB 060908, Swift/XRT refined analysis
  60. GRB 060908: Swift/UVOT Observations
  61. GRB 060908: Danish/DFOSC optical observations
  62. GRB 060908, Swift-BAT refined analysis
  63. GRB 060904B : CFHT/WIRCam NIR afterglow observations
  64. GRB 060908: REM optical prompt observation
  65. GRB 060904A: Suzaku/WAM observation of the prompt emission
  66. GRB060906 , optical observation
  67. GRB060904b optical detections (delayed report due to internet outage)
  68. GRB 060906: optical observation
  69. GRB 060906: Early RAPTOR optical limits
  70. GRB 060906, Swift-BAT refined spectral analysis
  71. GRB 060906: Swift/XRT Refined Analysis
  72. GRB 060906: Swift-UVOT observations
  73. VLT redshift of GRB 060906
  74. GRB 060906, Swift-BAT refined analysis
  75. GRB 060906: FRAM observations - flash determination (airplane)
  76. GRB 060906: KAIT observations
  77. GRB 060906: Confirmation of P60 Optical Afterglow
  78. GRB 060906: observations with FRAM
  79. GRB 060904A Milagro GeV/TeV Observations
  80. GRB060904b, optical observations
  81. GRB 060904b: SMARTS optical/IR afterglow observations
  82. GRB 060904B: RTT150 optical observations
  83. GRB060904A: Swift/UVOT optical observations
  84. GRB 060904A: Subaru NIR observation
  85. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  86. GRB 060904B: Swift-BAT refined analysis
  87. GRB060904b: Optical observations with Swift/UVOT
  88. Konus-Wind observation of GRB 060904A
  89. GRB 060904B: Swift-XRT refined analysis
  90. GRB 060904A: Refined analysis of the Swift-BAT burst
  91. GRB 060904A: Swift-XRT refined analysis
  92. GRB 060904A: Suzaku-XIS and -HXD observation plan
  93. GRB 060904B: VLT redshift
  94. GRB 060904A: P60 Observations
  95. GRB060904B: Watcher observations
  96. GRB 060904B BOOTES-IR and 1.5m OSN observations
  97. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  98. 060901: Swift UVOT followup observations
  99. Konus-Wind observation of GRB 060901
  100. GRB 060901: SMARTS optical/IR observations update

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