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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"

32706 results found.

  1. GRB 060926: BOOTES-IR observations
  2. GRB060926 OPTIMA-Burst optical observation
  3. GRB 060926: MASTER optical observation
  4. GRB 060923C, Swift-BAT refined analysis
  5. GRB 060923C: VLA Observation
  6. GRB 060923C: NIR afterglow confirmed
  7. GRB060923C: AROMA optical obsevation
  8. GRB 060923C: Gemini Observations and Afterglow Candidate
  9. GRB 060923C, optical observation
  10. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  11. GRB 060923C: VLT J-band observations
  12. GRB060923B: Swift/UVOT upper limits
  13. GRB 060923B: Swift XRT Refined Analysis
  14. GRB 060923C: Swift XRT refined analysis
  15. GRB 060923C, Swift-BAT partial refined analysis
  16. GRB 060923A: Swift XRT refined analysis
  17. GRB 060923C: Keck Observations
  18. GRB 060923A: Keck and Gemini Observations
  19. GRB 060923B, Swift-BAT refined analysis
  20. GRB060923C : Faulkes Telescope South optical limits
  21. GRB060923C: Faulkes Telescope North optical observations
  22. GRB 060923C: optical observation
  23. GRB 060923, Swift-BAT refined analysis
  24. GRB 060923: Early Super-LOTIS Observations
  25. GRB 060923: UKIRT nIR observations - candidate afterglow
  26. GRB060923: Faulkes Telescope North optical observations
  27. GRB060923 - SDSS Pre-Burst Observations
  28. GRB 060923: KAIT observations
  29. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  30. GRB060919: Swift/UVOT optical observations
  31. GRB 060919 : Faulkes South Telescope Observations
  32. GRB 060919, Swift-BAT refined analysis
  33. GRB060919: XRT refined analysis
  34. GRB 060912A: VLA Observation
  35. GRB 060912A: Probable Host Galaxy
  36. GRB060825: MAGIC telescope GeV observation
  37. Konus-Wind observation of GRB 060912
  38. GRB 060912: Redshift of nearby 2MASS galaxy
  39. GRB060912: optical observations
  40. GRB060912: Swift/UVOT Observations
  41. GRB060912: OPTIMA-Burst optical observations
  42. GRB 060912: Swift XRT Team Refined Analysis
  43. GRB 060912, Swift-BAT refined analysis
  44. GRB 060912: Correction to GCN 5559
  45. VLA observations of GRB 060908
  46. GRB 060908: redshift
  47. GRB 060908, Swift/XRT refined analysis
  48. GRB 060908: Swift/UVOT Observations
  49. GRB 060908: Danish/DFOSC optical observations
  50. GRB 060908, Swift-BAT refined analysis
  51. GRB 060904B : CFHT/WIRCam NIR afterglow observations
  52. GRB 060908: REM optical prompt observation
  53. GRB 060904A: Suzaku/WAM observation of the prompt emission
  54. GRB060906 , optical observation
  55. GRB060904b optical detections (delayed report due to internet outage)
  56. GRB 060906: optical observation
  57. GRB 060906: Early RAPTOR optical limits
  58. GRB 060906, Swift-BAT refined spectral analysis
  59. GRB 060906: Swift/XRT Refined Analysis
  60. GRB 060906: Swift-UVOT observations
  61. VLT redshift of GRB 060906
  62. GRB 060906, Swift-BAT refined analysis
  63. GRB 060906: FRAM observations - flash determination (airplane)
  64. GRB 060906: KAIT observations
  65. GRB 060906: Confirmation of P60 Optical Afterglow
  66. GRB 060906: observations with FRAM
  67. GRB 060904A Milagro GeV/TeV Observations
  68. GRB060904b, optical observations
  69. GRB 060904b: SMARTS optical/IR afterglow observations
  70. GRB 060904B: RTT150 optical observations
  71. GRB060904A: Swift/UVOT optical observations
  72. GRB 060904A: Subaru NIR observation
  73. GRB 060904A: pseudo-z from spectral parameters of the prompt emission
  74. GRB 060904B: Swift-BAT refined analysis
  75. GRB060904b: Optical observations with Swift/UVOT
  76. Konus-Wind observation of GRB 060904A
  77. GRB 060904B: Swift-XRT refined analysis
  78. GRB 060904A: Refined analysis of the Swift-BAT burst
  79. GRB 060904A: Swift-XRT refined analysis
  80. GRB 060904A: Suzaku-XIS and -HXD observation plan
  81. GRB 060904B: VLT redshift
  82. GRB 060904A: P60 Observations
  83. GRB060904B: Watcher observations
  84. GRB 060904B BOOTES-IR and 1.5m OSN observations
  85. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  86. 060901: Swift UVOT followup observations
  87. Konus-Wind observation of GRB 060901
  88. GRB 060901: SMARTS optical/IR observations update
  89. GRB 060901: Swift/XRT Refined Analysis
  90. GRB 060901: SMARTS optical/IR observations
  91. GRB 060901: Swift/XRT Position
  92. GRB 060901: Watcher observations
  93. GRB 060605, observations using an Integral Field Unit
  94. GRB 060604: VLA Observation
  95. GRB 060814: Suzaku/WAM observation of the prompt emission
  96. GRB 060605: VLA Observation
  97. GRB 060707: VLA observation
  98. GRB 060825: VLA observations
  99. Swift-BAT trigger 226614 is not a GRB
  100. GRB 060825: XRT Team Refined Analysis

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